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• Linux Mint 10 LXDE computer to act as LTSP Server without luck

  - by Rautamiekka

  So I've tried to make our screen-broken HP laptop to also serve as LTSP Server in addition to various other tasks, without luck, which may be cuz I'm running LM10 LXDE while the instructions are for Ubuntu. Excuse my ignorance. The entire output from Terminal after installing LTSP stuff along with a Server kernel and a load of other packages: administrator@rauta-mint-turion ~ $ sudo lt ltrace ltsp-build-client ltsp-chroot ltspfs ltspfsmounter ltsp-info ltsp-localapps ltsp-update-image ltsp-update-kernels ltsp-update-sshkeys administrator@rauta-mint-turion ~ $ sudo ltsp-update-sshkeys administrator@rauta-mint-turion ~ $ sudo ltsp-update-kernels find: `/opt/ltsp/': No such file or directory administrator@rauta-mint-turion ~ $ sudo ltsp-build-client /usr/share/ltsp/plugins/ltsp-build-client/common/010-chroot-tagging: line 3: /opt/ltsp/i386/etc/ltsp_chroot: No such file or directory error: LTSP client installation ended abnormally administrator@rauta-mint-turion ~ $ sudo ltsp-update-image Cannot determine assigned port. Assigning to port 2000. mkdir: cannot create directory `/opt/ltsp/i386/etc/ltsp': No such file or directory /usr/sbin/ltsp-update-image: 274: cannot create /opt/ltsp/i386/etc/ltsp/update-kernels.conf: Directory nonexistent /usr/sbin/ltsp-update-image: 274: cannot create /opt/ltsp/i386/etc/ltsp/update-kernels.conf: Directory nonexistent Regenerating kernel... chroot: failed to run command `/usr/share/ltsp/update-kernels': No such file or directory Done. Configuring inetd... Done. Updating pxelinux default configuration...Done. Skipping invalid chroot: /opt/ltsp/i386 chroot: failed to run command `test': No such file or directory administrator@rauta-mint-turion ~ $ sudo ltsp-chroot chroot: failed to run command `/bin/bash': No such file or directory administrator@rauta-mint-turion ~ $ bash administrator@rauta-mint-turion ~ $ exit exit administrator@rauta-mint-turion ~ $ sudo ls /opt/ltsp i386 administrator@rauta-mint-turion ~ $ sudo ls /opt/ltsp/i386/ administrator@rauta-mint-turion ~ $ sudo ltsp-build-client NOTE: Root directory /opt/ltsp/i386 already exists, this will lead to problems, please remove it before trying again. Exiting. error: LTSP client installation ended abnormally administrator@rauta-mint-turion ~ $ sudo rm -rv /opt/ltsp/i386 removed directory: `/opt/ltsp/i386' administrator@rauta-mint-turion ~ $ sudo ltsp-build-client /usr/share/ltsp/plugins/ltsp-build-client/common/010-chroot-tagging: line 3: /opt/ltsp/i386/etc/ltsp_chroot: No such file or directory error: LTSP client installation ended abnormally administrator@rauta-mint-turion ~ $ aptitude search ltsp p fts-ltsp-ldap - LDAP LTSP module for the TFTP/Fuse supplicant p ltsp-client - LTSP client environment p ltsp-client-core - LTSP client environment (core) p ltsp-cluster-accountmanager - Account creation and management daemon for LTSP p ltsp-cluster-control - Web based thin-client configuration management p ltsp-cluster-lbagent - LTSP loadbalancer agent offers variables about the state of the ltsp server p ltsp-cluster-lbserver - LTSP loadbalancer server returns the optimal ltsp server to terminal p ltsp-cluster-nxloadbalancer - Minimal NX loadbalancer for ltsp-cluster p ltsp-cluster-pxeconfig - LTSP-Cluster symlink generator p ltsp-controlaula - Classroom management tool with ltsp clients p ltsp-docs - LTSP Documentation p ltsp-livecd - starts an LTSP live server on an Ubuntu livecd session p ltsp-manager - Ubuntu LTSP server management GUI i A ltsp-server - Basic LTSP server environment i ltsp-server-standalone - Complete LTSP server environment i A ltspfs - Fuse based remote filesystem for LTSP thin clients p ltspfsd - Fuse based remote filesystem hooks for LTSP thin clients p ltspfsd-core - Fuse based remote filesystem daemon for LTSP thin clients p python-ltsp - provides ltsp related functions administrator@rauta-mint-turion ~ $ sudo aptitude purge ltsp-server ltsp-server-standalone ltspfs The following packages will be REMOVED: debconf-utils{u} debootstrap{u} dhcp3-server{u} gstreamer0.10-pulseaudio{u} ldm-server{u} libpulse-browse0{u} ltsp-server{p} ltsp-server-standalone{p} ltspfs{p} nbd-server{u} openbsd-inetd{u} pulseaudio{u} pulseaudio-esound-compat{u} pulseaudio-module-x11{u} pulseaudio-utils{u} squashfs-tools{u} tftpd-hpa{u} 0 packages upgraded, 0 newly installed, 17 to remove and 0 not upgraded. Need to get 0B of archives. After unpacking 6,996kB will be freed. Do you want to continue? [Y/n/?] (Reading database ... 158454 files and directories currently installed.) Removing ltsp-server-standalone ... Purging configuration files for ltsp-server-standalone ... Removing ltsp-server ... Purging configuration files for ltsp-server ... dpkg: warning: while removing ltsp-server, directory '/var/lib/tftpboot/ltsp' not empty so not removed. dpkg: warning: while removing ltsp-server, directory '/var/lib/tftpboot' not empty so not removed. Processing triggers for man-db ... (Reading database ... 158195 files and directories currently installed.) Removing debconf-utils ... Removing debootstrap ... Removing dhcp3-server ... * Stopping DHCP server dhcpd3 [ OK ] Removing gstreamer0.10-pulseaudio ... Removing ldm-server ... Removing pulseaudio-module-x11 ... Removing pulseaudio-esound-compat ... Removing pulseaudio ... * PulseAudio configured for per-user sessions Removing pulseaudio-utils ... Removing libpulse-browse0 ... Processing triggers for man-db ... Processing triggers for ureadahead ... ureadahead will be reprofiled on next reboot Processing triggers for libc-bin ... ldconfig deferred processing now taking place (Reading database ... 157944 files and directories currently installed.) Removing ltspfs ... Processing triggers for man-db ... (Reading database ... 157932 files and directories currently installed.) Removing nbd-server ... Stopping Network Block Device server: nbd-server. Removing openbsd-inetd ... * Stopping internet superserver inetd [ OK ] Removing squashfs-tools ... Removing tftpd-hpa ... tftpd-hpa stop/waiting Processing triggers for ureadahead ... Processing triggers for man-db ... administrator@rauta-mint-turion ~ $ sudo aptitude purge ~c The following packages will be REMOVED: dhcp3-server{p} libpulse-browse0{p} nbd-server{p} openbsd-inetd{p} pulseaudio{p} tftpd-hpa{p} 0 packages upgraded, 0 newly installed, 6 to remove and 0 not upgraded. Need to get 0B of archives. After unpacking 0B will be used. Do you want to continue? [Y/n/?] (Reading database ... 157881 files and directories currently installed.) Removing dhcp3-server ... Purging configuration files for dhcp3-server ... Removing libpulse-browse0 ... Purging configuration files for libpulse-browse0 ... Removing nbd-server ... Purging configuration files for nbd-server ... Removing openbsd-inetd ... Purging configuration files for openbsd-inetd ... Removing pulseaudio ... Purging configuration files for pulseaudio ... Removing tftpd-hpa ... Purging configuration files for tftpd-hpa ... Processing triggers for ureadahead ... administrator@rauta-mint-turion ~ $ sudo aptitude install ltsp-server-standalone The following NEW packages will be installed: debconf-utils{a} debootstrap{a} ldm-server{a} ltsp-server{a} ltsp-server-standalone ltspfs{a} nbd-server{a} openbsd-inetd{a} squashfs-tools{a} The following packages are RECOMMENDED but will NOT be installed: dhcp3-server pulseaudio-esound-compat tftpd-hpa 0 packages upgraded, 9 newly installed, 0 to remove and 0 not upgraded. Need to get 0B/498kB of archives. After unpacking 2,437kB will be used. Do you want to continue? [Y/n/?] Preconfiguring packages ... Selecting previously deselected package openbsd-inetd. (Reading database ... 157868 files and directories currently installed.) Unpacking openbsd-inetd (from .../openbsd-inetd_0.20080125-4ubuntu2_i386.deb) ... Processing triggers for man-db ... Processing triggers for ureadahead ... Setting up openbsd-inetd (0.20080125-4ubuntu2) ... * Stopping internet superserver inetd [ OK ] * Starting internet superserver inetd [ OK ] Selecting previously deselected package ldm-server. (Reading database ... 157877 files and directories currently installed.) Unpacking ldm-server (from .../ldm-server_2%3a2.1.3-0ubuntu1_all.deb) ... Selecting previously deselected package debconf-utils. Unpacking debconf-utils (from .../debconf-utils_1.5.32ubuntu3_all.deb) ... Selecting previously deselected package debootstrap. Unpacking debootstrap (from .../debootstrap_1.0.23ubuntu1_all.deb) ... Selecting previously deselected package nbd-server. Unpacking nbd-server (from .../nbd-server_1%3a2.9.14-2ubuntu1_i386.deb) ... Selecting previously deselected package squashfs-tools. Unpacking squashfs-tools (from .../squashfs-tools_1%3a4.0-8_i386.deb) ... Selecting previously deselected package ltsp-server. GNU nano 2.2.4 File: /etc/ltsp/ltsp-update-image.conf # Configuration file for ltsp-update-image # By default, do not compress the image # as it's reported to make it unstable NO_COMP="-noF -noD -noI -no-exports" [ Switched to /etc/ltsp/ltsp-update-image.conf ] administrator@rauta-mint-turion ~ $ ls /opt/ firefox/ ltsp/ mint-flashplugin/ administrator@rauta-mint-turion ~ $ ls /opt/ltsp/i386/ administrator@rauta-mint-turion ~ $ ls /opt/ltsp/ i386 administrator@rauta-mint-turion ~ $ sudo ltsp ltsp-build-client ltsp-chroot ltspfs ltspfsmounter ltsp-info ltsp-localapps ltsp-update-image ltsp-update-kernels ltsp-update-sshkeys administrator@rauta-mint-turion ~ $ sudo ltsp-build-client NOTE: Root directory /opt/ltsp/i386 already exists, this will lead to problems, please remove it before trying again. Exiting. error: LTSP client installation ended abnormally administrator@rauta-mint-turion ~ $ ^C administrator@rauta-mint-turion ~ $ sudo aptitude purge ltsp ltspfs ltsp-server ltsp-server-standalone administrator@rauta-mint-turion ~ $ sudo aptitude purge ltsp-server The following packages will be REMOVED: ltsp-server{p} 0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded. Need to get 0B of archives. After unpacking 1,073kB will be freed. The following packages have unmet dependencies: ltsp-server-standalone: Depends: ltsp-server but it is not going to be installed. The following actions will resolve these dependencies: Remove the following packages: 1) ltsp-server-standalone Accept this solution? [Y/n/q/?] The following packages will be REMOVED: debconf-utils{u} debootstrap{u} ldm-server{u} ltsp-server{p} ltsp-server-standalone{a} ltspfs{u} nbd-server{u} openbsd-inetd{u} squashfs-tools{u} 0 packages upgraded, 0 newly installed, 9 to remove and 0 not upgraded. Need to get 0B of archives. After unpacking 2,437kB will be freed. Do you want to continue? [Y/n/?] (Reading database ... 158244 files and directories currently installed.) Removing ltsp-server-standalone ... (Reading database ... 158240 files and directories currently installed.) Removing ltsp-server ... Purging configuration files for ltsp-server ... dpkg: warning: while removing ltsp-server, directory '/var/lib/tftpboot/ltsp' not empty so not removed. dpkg: warning: while removing ltsp-server, directory '/var/lib/tftpboot' not empty so not removed. Processing triggers for man-db ... (Reading database ... 157987 files and directories currently installed.) Removing debconf-utils ... Removing debootstrap ... Removing ldm-server ... Removing ltspfs ... Removing nbd-server ... Stopping Network Block Device server: nbd-server. Removing openbsd-inetd ... * Stopping internet superserver inetd [ OK ] Removing squashfs-tools ... Processing triggers for man-db ... Processing triggers for ureadahead ... administrator@rauta-mint-turion ~ $ sudo aptitude purge ~c The following packages will be REMOVED: ltsp-server-standalone{p} nbd-server{p} openbsd-inetd{p} 0 packages upgraded, 0 newly installed, 3 to remove and 0 not upgraded. Need to get 0B of archives. After unpacking 0B will be used. Do you want to continue? [Y/n/?] (Reading database ... 157871 files and directories currently installed.) Removing ltsp-server-standalone ... Purging configuration files for ltsp-server-standalone ... Removing nbd-server ... Purging configuration files for nbd-server ... Removing openbsd-inetd ... Purging configuration files for openbsd-inetd ... Processing triggers for ureadahead ... administrator@rauta-mint-turion ~ $ sudo rm -rv /var/lib/t teamspeak-server/ tftpboot/ transmission-daemon/ administrator@rauta-mint-turion ~ $ sudo rm -rv /var/lib/tftpboot removed `/var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default' removed directory: `/var/lib/tftpboot/ltsp/i386/pxelinux.cfg' removed directory: `/var/lib/tftpboot/ltsp/i386' removed directory: `/var/lib/tftpboot/ltsp' removed directory: `/var/lib/tftpboot' administrator@rauta-mint-turion ~ $ sudo find / -name "ltsp" /opt/ltsp administrator@rauta-mint-turion ~ $ sudo rm -rv /opt/ltsp removed directory: `/opt/ltsp/i386' removed directory: `/opt/ltsp' administrator@rauta-mint-turion ~ $ sudo aptitude install ltsp-server-standalone The following NEW packages will be installed: debconf-utils{a} debootstrap{a} ldm-server{a} ltsp-server{a} ltsp-server-standalone ltspfs{a} nbd-server{a} openbsd-inetd{a} squashfs-tools{a} The following packages are RECOMMENDED but will NOT be installed: dhcp3-server pulseaudio-esound-compat tftpd-hpa 0 packages upgraded, 9 newly installed, 0 to remove and 0 not upgraded. Need to get 0B/498kB of archives. After unpacking 2,437kB will be used. Do you want to continue? [Y/n/?] Preconfiguring packages ... Selecting previously deselected package openbsd-inetd. (Reading database ... 157868 files and directories currently installed.) Unpacking openbsd-inetd (from .../openbsd-inetd_0.20080125-4ubuntu2_i386.deb) ... Processing triggers for man-db ... GNU nano 2.2.4 New Buffer GNU nano 2.2.4 File: /etc/ltsp/dhcpd.conf # # Default LTSP dhcpd.conf config file. # authoritative; subnet 192.168.2.0 netmask 255.255.255.0 { range 192.168.2.70 192.168.2.79; option domain-name "jarvinen"; option domain-name-servers 192.168.2.254; option broadcast-address 192.168.2.255; option routers 192.168.2.254; # next-server 192.168.0.1; # get-lease-hostnames true; option subnet-mask 255.255.255.0; option root-path "/opt/ltsp/i386"; if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" { filename "/ltsp/i386/pxelinux.0"; } else { filename "/ltsp/i386/nbi.img"; } } [ Wrote 22 lines ] administrator@rauta-mint-turion ~ $ sudo service dhcp3-server start * Starting DHCP server dhcpd3 [ OK ] administrator@rauta-mint-turion ~ $ sudo ltsp-build-client /usr/share/ltsp/plugins/ltsp-build-client/common/010-chroot-tagging: line 3: /opt/ltsp/i386/etc/ltsp_chroot: No such file or directory error: LTSP client installation ended abnormally administrator@rauta-mint-turion ~ $ sudo cat /usr/share/ltsp/plugins/ltsp-build-client/common/010-chroot-tagging case "$MODE" in after-install) echo LTSP_CHROOT=$ROOT >> $ROOT/etc/ltsp_chroot ;; esac administrator@rauta-mint-turion ~ $ cd $ROOT/etc/ltsp_chroot bash: cd: /etc/ltsp_chroot: No such file or directory administrator@rauta-mint-turion ~ $ cd $ROOT/etc/ administrator@rauta-mint-turion /etc $ ls acpi chatscripts emacs group insserv.conf.d logrotate.conf mysql php5 rc6.d smbnetfs.conf UPower adduser.conf ConsoleKit environment group- iproute2 logrotate.d nanorc phpmyadmin rc.local snmp usb_modeswitch.conf alternatives console-setup esound grub.d issue lsb-base nbd-server pm rcS.d sound usb_modeswitch.d anacrontab cron.d firefox gshadow issue.net lsb-base-logging.sh ndiswrapper pnm2ppa.conf request-key.conf ssh ushare.conf apache2 cron.daily firefox-3.5 gshadow- java lsb-release netscsid.conf polkit-1 resolvconf ssl vga apm cron.hourly firestarter gtk-2.0 java-6-sun ltrace.conf network popularity-contest.conf resolv.conf sudoers vim apparmor cron.monthly fonts gtkmathview kbd ltsp NetworkManager ppp rmt sudoers.d vlc apparmor.d crontab foomatic gufw kernel lxdm networks printcap rpc su-to-rootrc vsftpd.conf apport cron.weekly fstab hal kernel-img.conf magic nsswitch.conf profile rsyslog.conf sweeprc w3m apt crypttab ftpusers hdparm.conf kerneloops.conf magic.mime ntp.conf profile.d rsyslog.d sysctl.conf wgetrc at.deny cups fuse.conf host.conf kompozer mailcap obex-data-server protocols samba sysctl.d wildmidi auto-apt dbconfig-common gai.conf hostname ldap mailcap.order ODBCDataSources psiconv sane.d teamspeak-server wodim.conf avahi dbus-1 gamin hosts ld.so.cache manpath.config odbc.ini pulse screenrc terminfo wpa_supplicant bash.bashrc debconf.conf gconf hosts.allow ld.so.conf menu openal purple securetty thunderbird X11 bash_completion debian_version gdb hosts.deny ld.so.conf.d menu-methods openoffice python security timezone xdg bash_completion.d default gdm hp legal mime.types opt python2.6 sensors3.conf transmission-daemon xml bindresvport.blacklist defoma ghostscript ifplugd lftp.conf mke2fs.conf pam.conf python2.7 sensors.d ts.conf xulrunner-1.9.2 blkid.conf deluser.conf gimp inetd.conf libpaper.d modprobe.d pam.d python3.1 services ucf.conf zsh_command_not_found blkid.tab depmod.d gnome init libreoffice modules pango rc0.d sgml udev bluetooth dhcp gnome-system-tools init.d linuxmint motd papersize rc1.d shadow ufw bonobo-activation dhcp3 gnome-vfs-2.0 initramfs-tools locale.alias mplayer passwd rc2.d shadow- updatedb.conf ca-certificates dictionaries-common gnome-vfs-mime-magic inputrc localtime mtab passwd- rc3.d shells update-manager ca-certificates.conf doc-base gre.d insserv logcheck mtab.fuselock pcmcia rc4.d skel update-motd.d calendar dpkg groff insserv.conf login.defs mtools.conf perl rc5.d smb2www update-notifier administrator@rauta-mint-turion /etc $ cd ltsp/ administrator@rauta-mint-turion /etc/ltsp $ ls dhcpd.conf ltsp-update-image.conf administrator@rauta-mint-turion /etc/ltsp $ cat dhcpd.conf # # Default LTSP dhcpd.conf config file. # authoritative; subnet 192.168.2.0 netmask 255.255.255.0 { range 192.168.2.70 192.168.2.79; option domain-name "jarvinen"; option domain-name-servers 192.168.2.254; option broadcast-address 192.168.2.255; option routers 192.168.2.254; # next-server 192.168.0.1; # get-lease-hostnames true; option subnet-mask 255.255.255.0; option root-path "/opt/ltsp/i386"; if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" { filename "/ltsp/i386/pxelinux.0"; } else { filename "/ltsp/i386/nbi.img"; } } administrator@rauta-mint-turion /etc/ltsp $

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• Is Your ASP.NET Development Server Not Working?

  - by Paulo Morgado

  Since Visual Studio 2005, Visual Studio comes with a development web server: the ASP.NET Development Server. I’ve been using this web server for simple test projects since than with Visual Studio 2005 and Visual Studio 2008 in Windows XP Professional on my work laptop and Windows XP Professional, Windows Vista 64bit Ultimate and Windows 7 64bit Ultimate at my home desktop without any problems (apart the known custom identity problem, that is). When I received my new work laptop, I installed Windows Vista 64bit Enterprise and Visual Studio 2008 and, for my surprise, the ASP.NET Development Server wasn’t working. I started looking for differences between the laptop environment and the desktop environment and the most notorious differences were: System Laptop Desktop SKU Windows Vista 64bit Enterprise Windows Vista 64bit Ultimate Joined to a Domain Yes No Anti-Virus McAffe ESET After asserting that no domain policies were being applied to my laptop and domain user and nothing was being logged by the ant-virus, my suspicions turned to the fact that the laptop was running an Enterprise SKU and the desktop was running an Ultimate SKU. After having problems with other applications I was sure that problem was the Enterprise SKU, but never found a solution to the problem. Because I wasn’t doing any web development at the time, I left it alone. After upgrading to Windows 7, the problem persisted but, because I wasn’t doing any web development at the time, once again, I left it alone. Now that I installed Visual Studio 2010 I had to solve this. After searching around forums and blogs that either didn’t offer an answer or offered very complicated workarounds that, sometimes, involved messing with the registry, I came to the conclusion that the solution is, in fact, very simple. When Windows Vista is installed, hosts file, according to this contains this definition: 127.0.0.1 localhost ::1 localhost This was not what I had on my laptop hosts file. What I had was this: #127.0.0.1 localhost #::1 localhost I might have changed it myself, but from the amount of people that I found complaining about this problem on Windows Vista, this was probably the way it was. The installation of Windows 7 leaves the hosts file like this: #127.0.0.1 localhost #::1 localhost And although the ASP.NET Development Server works fine on Windows 7 64bit Ultimate, on Windows 7 64bit Enterprise it needs to be change to this: 127.0.0.1 localhost ::1 localhost And I suspect it’s the same with Windows Vista 64bit Enterprise.

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• Example WLST Script to Obtain JDBC and JTA MBean Values

  - by Daniel Mortimer

  Introduction Following on from the blog entry "Get an Offline or Online WebLogic Domain Summary Using WLST!", I have had a request to create a smaller example which only collects a selection of JDBC (System Resource) and JTA configuration and runtime MBeans values. So, here it is. Download Sample Script You can grab the sample script by clicking here. Instructions to Run: 1. After download, extract the zip to the machine hosting the WebLogic environment. You should have three directories along with a readme.txt output Sample_Output scripts 2. In the scripts directory, find the start wrapper script startWLSTJDBCSummarizer.sh (Unix) or startWLSTJDBCSummarizer.cmd (MS Windows). Open the appropriate file in an editor and change the environment variable settings to suit your system. Example - startWLSTDomainSummarizer.cmd set WL_HOME=D:\product\FMW11g\wlserver_10.3 set DOMAIN_HOME=D:\product\FMW11g\user_projects\domains\MyDomain set WLST_OUTPUT_PATH=D:\WLSTDomainSummarizer\output\ set WLST_OUTPUT_FILE=WLST_JDBC_Summary_Via_MBeans.html call "%WL_HOME%\common\bin\wlst.cmd" WLS_JDBC_Summary_Online.py Note: The WLST_OUTPUT_PATH directory value must have a trailing slash. If there is no trailing slash, the script will error and not continue.  3. Run the shell / command line wrapper script. It should launch WLST and kick off "WLS_JDBC_Summary_Online.py". This will hit you with some prompts e.g. Is your domain Admin Server up and running and do you have the connection details? (Y /N ): Y Enter connection URL to Admin Server e.g t3://mymachine.acme.com:7001 : t3://localhost:7001 Enter weblogic username: weblogic Enter weblogic username password (function prompt 1): welcome1 (Note: the value typed in for password will not be echoed back to the console). 4. If the scripts run successfully, you should get a HTML summary in the specified output directory. See example screenshots below: Screenshot 1 - JDBC System Resource Tab Page  Screenshot 2 - JTA Tab Page 5. For the HTML to render correctly, ensure the .js and .css files provided (review the output directory created by the zip file extraction) are accessible. For example, to view the HTML locally (without using a web server), place the HTML output, jquery-ui.js, spry.js and wlstsummarizer.css in the same directory. Disclaimer This is a sample script. I have tested it against WebLogic Server 10.3.6 domains on MS Windows and Unix.  I cannot guarantee that the script will run error free or produce the expected output on your system. If you have any feedback add a comment to the blog. I will endeavour to fix any problems with my WLST code. Credits JQuery: http://jquery.com/ Spry (Adobe) : https://github.com/adobe/Spryhttp://www.red-team-design.com/cool-headings-with-pseudo-elements

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• Migrating from IBM AIX/DB2 Power systems to Oracle Technologies

  - by zeynep.koch(at)oracle.com

  If you are planning to migrate from  IBM DB2 on AIX Power Systems to more open and better-performing computing environment--one that offers enhanced flexibility, clustering, availability, and security, as well as lower maintenance than download this guide that outlines migrating to Oracle Database 11g and Oracle Linux running on Oracle's Sun Fire X4800 server.This guide shows you how to:Move sample applications with an IBM DB2 on an IBM Power System to Oracle Database 11g Release 2Install Oracle Linux and Oracle Database Release 2 on the Oracle's Sun Fire X4800 serverMigrate user databases from the IBM Power System to Oracle's Sun Fire X4800 serverDownload

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• How to configure XRDP to start cinnamon as default desktop session

  - by Jeff

  I was wondering if there is a way to make Cinnamon 1.4 the default environment upon logging in to Ubuntu 12.04. I can install Cinnamon 1.4 without any problems, but I am trying to run XRDP to log in from a Windows machine and would like it to start "Cinnamon session" instead of a Unity session by default. The question is, How can I tell XRDP to use Cinnamon instead of Unity upon logging in? XRDP seems to work much better than any VNC based servers.

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• Q&amp;A: Can you develop for the Windows Azure Platform using Windows XP?

  - by Eric Nelson

  This question has come up several times recently as we take several hundred UK developers through 6 Weeks of Windows Azure training (sorry – we are full). Short answer: In the main, yes Longer answer: The question is sparked by the requirements as stated on the Windows Azure SDK download page. Namely: Supported Operating Systems: Windows 7; Windows Vista; Windows Vista 64-bit Editions Service Pack 1; Windows Vista Business; Windows Vista Business 64-bit edition; Windows Vista Enterprise; Windows Vista Enterprise 64-bit edition; Windows Vista Home Premium; Windows Vista Home Premium 64-bit edition; Windows Vista Service Pack 1; Windows Vista Service Pack 2; Windows Vista Ultimate; Windows Vista Ultimate 64-bit edition Notice there is no mention of Windows XP. However things are not quite that simple. The Windows Azure Platform consists of three released technologies Windows Azure SQL Azure Windows Azure platform AppFabric The Windows Azure SDK is only for one of the three technologies, Windows Azure. What about SQL Azure and AppFabric? Well it turns out that you can develop for both of these technologies just fine with Windows XP: SQL Azure development is really just SQL Server development with a few gotchas – and for local development you can simply use SQL Server 2008 R2 Express (other versions will also work). AppFabric also has no local simulation environment and the SDK will install fine on Windows XP (SDK download) Actually it is also possible to do Windows Azure development on Windows XP if you are willing to always work directly against the real Azure cloud running in Microsoft datacentres. However in practice this would be painful and time consuming, hence why the Windows Azure SDK installs a local simulation environment. Therefore if you want to develop for Windows Azure I would recommend you either upgrade from Windows XP to Windows 7 or… you use a virtual machine running Windows 7. If this is a temporary requirement, then you could consider building a virtual machine using the Windows 7 Enterprise 90 day eval. Or you could download a pre-configured VHD – but I can’t quite find the link for a Windows 7 VHD. Pointers welcomed. Thanks.

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• Oracle Linux Training Calendar

  - by Antoinette O'Sullivan

  The Oracle Linux System Administrator Curriculum is designed to provide you with the knowledge and skills necessary to effectively administer an Oracle Linux environment. These classes will help you prepare to install, configure, and manage your enterprise Linux environment as well as prepare you for the Oracle Linux Certification. You can take these courses as a: Live-Virtual event: Following the instructor-led classes from your own desk - no travel required. There is an extensive list of events on the schedule to suit different timezones. See full list on http://oracle.com/education/linux. In-Class event: Travel to an education center to take these classes. Below is a sample of in-class events on the schedule: Unix and Linux Essentials: This 3-day class is for those new to the linux operating system. You learn to manage files & directories from the command line, perform remote connections, file transfers & more.  Location  Date  Delivery Language  Nairobi, Kenya  3 December 2012  English  Riyadh, Saudia Arabia  5 January 2013  English  Cape Town, South Africa  9 January 2013  English  Durban, South Africa  9 January 2013  English  Johannesburg, South Africa  9 January 2013  English  Woodmead, South Africa  15 July 2013  English  Denver, United States  23 January 2013  English  Columbia, United States  2 January 2013  English  East Lansing, United States  9 January 2013  English  Roseville, United States  1 April 2013  English  Morrisville, United States  11 February 2013  English  Jakarta, Indonesia  26 December 2012  English  Kuala Lumpur, Malaysia  29 January 2013  English  Auckland, New Zealand  12 December 2012  English  Makati City, Philippines  14 January 2013  English  Singapore  13 February 2013  English  North Sydney, Australia  4 February 2013  English  Brisbane, Australia  29 April 2013  English  Melbourne, Australia  29 January 2013  English Oracle Linux System Administration: This 5 day course covers a broad range of Oracle Linux system administration tasks, from installing the operating system to preparing the system for Oracle Database. The course also provides an extensive hands-on experience for key system administration tasks. You will gain comprehensive skills in installing, configuring, and managing an Oracle Linux system as well as insight into ULN, Ksplice and UEK.  Location  Date  Delivery Language  Brussels, Belgium  26 November 2012  English  Windhof, Luxembourg  17 December 2012  English  Utrecht, Netherlands  11 February 2013  Dutch  Warsaw, Poland  25 February 2013  Polish  Gabarone, Botswana  22 April 2013  English  Nairobi, Kenya  10 December 2012  English  Johannesburg, South Africa  11 March 2013  English  Belmont, CA, United States  11 February 2013  English  Irvine, CA, United States  25 March 2013  English  Roseville, MN, United States  26 November 2013  English  Irving, TX, United States  14 January 2013  English  Jakarta, Indonesia  3 December 2012  English  Singapore  26 November 2012  English  Canberra, Australia  21 January 2013  English  Sydney, Australia  21 January 2013  English  Melbourne, Australia  11 February 2013  English To test your Oracle Linux System Administration skills, take the Oracle Linux 6 Implementation Essentials Certification Exam. For more information on the Oracle Linux Curriculum or to express interest in additional events, go to http://oracle.com/education/linux.

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• Setting up a local AI server - easy with Solaris 11

  - by Stefan Hinker

  Many things are new in Solaris 11, Autoinstall is one of them.  If, like me, you've known Jumpstart for the last 2 centuries or so, you'll have to start from scratch.  Well, almost, as the concepts are similar, and it's not all that difficult.  Just new. I wanted to have an AI server that I could use for demo purposes, on the train if need be.  That answers the question of hardware requirements: portable.  But let's start at the beginning. First, you need an OS image, of course.  In the new world of Solaris 11, it is now called a repository.  The original can be downloaded from the Solaris 11 page at Oracle.   What you want is the "Oracle Solaris 11 11/11 Repository Image", which comes in two parts that can be combined using cat.  MD5 checksums for these (and all other downloads from that page) are available closer to the top of the page. With that, building the repository is quick and simple: # zfs create -o mountpoint=/export/repo rpool/ai/repo # zfs create rpool/ai/repo/s11 # mount -o ro -F hsfs /tmp/sol-11-1111-repo-full.iso /mnt # rsync -aP /mnt/repo /export/repo/s11 # umount /mnt # pkgrepo rebuild -s /export/repo/sol11/repo # zfs snapshot rpool/ai/repo/sol11@fcs # pkgrepo info -s /export/repo/sol11/repo PUBLISHER PACKAGES STATUS UPDATED solaris 4292 online 2012-03-12T20:47:15.378639Z That's all there's to it.  Let's make a snapshot, just to be on the safe side.  You never know when one will come in handy.  To use this repository, you could just add it as a file-based publisher: # pkg set-publisher -g file:///export/repo/sol11/repo solaris In case I'd want to access this repository through a (virtual) network, i'll now quickly activate the repository-service: # svccfg -s application/pkg/server \ setprop pkg/inst_root=/export/repo/sol11/repo # svccfg -s application/pkg/server setprop pkg/readonly=true # svcadm refresh application/pkg/server # svcadm enable application/pkg/server That's all you need - now point your browser to http://localhost/ to view your beautiful repository-server. Step 1 is done.  All of this, by the way, is nicely documented in the README file that's contained in the repository image. Of course, we already have updates to the original release.  You can find them in MOS in the Oracle Solaris 11 Support Repository Updates (SRU) Index.  You can simply add these to your existing repository or create separate repositories for each SRU.  The individual SRUs are self-sufficient and incremental - SRU4 includes all updates from SRU2 and SRU3.  With ZFS, you can also get both: A full repository with all updates and at the same time incremental ones up to each of the updates: # mount -o ro -F hsfs /tmp/sol-11-1111-sru4-05-incr-repo.iso /mnt # pkgrecv -s /mnt/repo -d /export/repo/sol11/repo '*' # umount /mnt # pkgrepo rebuild -s /export/repo/sol11/repo # zfs snapshot rpool/ai/repo/sol11@sru4 # zfs set snapdir=visible rpool/ai/repo/sol11 # svcadm restart svc:/application/pkg/server:default The normal repository is now updated to SRU4.  Thanks to the ZFS snapshots, there is also a valid repository of Solaris 11 11/11 without the update located at /export/repo/sol11/.zfs/snapshot/fcs . If you like, you can also create another repository service for each update, running on a separate port. But now lets continue with the AI server.  Just a little bit of reading in the dokumentation makes it clear that we will need to run a DHCP server for this.  Since I already have one active (for my SunRay installation) and since it's a good idea to have these kinds of services separate anyway, I decided to create this in a Zone.  So, let's create one first: # zfs create -o mountpoint=/export/install rpool/ai/install # zfs create -o mountpoint=/zones rpool/zones # zonecfg -z ai-server zonecfg:ai-server> create create: Using system default template 'SYSdefault' zonecfg:ai-server> set zonepath=/zones/ai-server zonecfg:ai-server> add dataset zonecfg:ai-server:dataset> set name=rpool/ai/install zonecfg:ai-server:dataset> set alias=install zonecfg:ai-server:dataset> end zonecfg:ai-server> commit zonecfg:ai-server> exit # zoneadm -z ai-server install # zoneadm -z ai-server boot ; zlogin -C ai-server Give it a hostname and IP address at first boot, and there's the Zone.  For a publisher for Solaris packages, it will be bound to the "System Publisher" from the Global Zone.  The /export/install filesystem, of course, is intended to be used by the AI server.  Let's configure it now: #zlogin ai-server root@ai-server:~# pkg install install/installadm root@ai-server:~# installadm create-service -n x86-fcs -a i386 \ -s pkg://solaris/install-image/[email protected],5.11-0.175.0.0.0.2.1482 \ -d /export/install/fcs -i 192.168.2.20 -c 3 With that, the core AI server is already done.  What happened here?  First, I installed the AI server software.  IPS makes that nice and easy.  If necessary, it'll also pull in the required DHCP-Server and anything else that might be missing.  Watch out for that DHCP server software.  In Solaris 11, there are two different versions.  There's the one you might know from Solaris 10 and earlier, and then there's a new one from ISC.  The latter is the one we need for AI.  The SMF service names of both are very similar.  The "old" one is "svc:/network/dhcp-server:default". The ISC-server comes with several SMF-services. We at least need "svc:/network/dhcp/server:ipv4".  The command "installadm create-service" creates the installation-service. It's called "x86-fcs", serves the "i386" architecture and gets its boot image from the repository of the system publisher, using version 5.11,5.11-0.175.0.0.0.2.1482, which is Solaris 11 11/11.  (The option "-a i386" in this example is optional, since the installserver itself runs on a x86 machine.) The boot-environment for clients is created in /export/install/fcs and the DHCP-server is configured for 3 IP-addresses starting at 192.168.2.20.  This configuration is stored in a very human readable form in /etc/inet/dhcpd4.conf.  An AI-service for SPARC systems could be created in the very same way, using "-a sparc" as the architecture option. Now we would be ready to register and install the first client.  It would be installed with the default "solaris-large-server" using the publisher "http://pkg.oracle.com/solaris/release" and would query it's configuration interactively at first boot.  This makes it very clear that an AI-server is really only a boot-server.  The true source of packets to install can be different.  Since I don't like these defaults for my demo setup, I did some extra config work for my clients. The configuration of a client is controlled by manifests and profiles.  The manifest controls which packets are installed and how the filesystems are layed out.  In that, it's very much like the old "rules.ok" file in Jumpstart.  Profiles contain additional configuration like root passwords, primary user account, IP addresses, keyboard layout etc.  Hence, profiles are very similar to the old sysid.cfg file. The easiest way to get your hands on a manifest is to ask the AI server we just created to give us it's default one.  Then modify that to our liking and give it back to the installserver to use: root@ai-server:~# mkdir -p /export/install/configs/manifests root@ai-server:~# cd /export/install/configs/manifests root@ai-server:~# installadm export -n x86-fcs -m orig_default \ -o orig_default.xml root@ai-server:~# cp orig_default.xml s11-fcs.small.local.xml root@ai-server:~# vi s11-fcs.small.local.xml root@ai-server:~# more s11-fcs.small.local.xml <!DOCTYPE auto_install SYSTEM "file:///usr/share/install/ai.dtd.1"> <auto_install> <ai_instance name="S11 Small fcs local"> <target> <logical> <zpool name="rpool" is_root="true"> <filesystem name="export" mountpoint="/export"/> <filesystem name="export/home"/> <be name="solaris"/> </zpool> </logical> </target> <software type="IPS"> <destination> <image> <!-- Specify locales to install --> <facet set="false">facet.locale.*</facet> <facet set="true">facet.locale.de</facet> <facet set="true">facet.locale.de_DE</facet> <facet set="true">facet.locale.en</facet> <facet set="true">facet.locale.en_US</facet> </image> </destination> <source> <publisher name="solaris"> <origin name="http://192.168.2.12/"/> </publisher> </source> <!-- By default the latest build available, in the specified IPS repository, is installed. If another build is required, the build number has to be appended to the 'entire' package in the following form: <name>pkg:/[email protected]#</name> --> <software_data action="install"> <name>pkg:/[email protected],5.11-0.175.0.0.0.2.0</name> <name>pkg:/group/system/solaris-small-server</name> </software_data> </software> </ai_instance> </auto_install> root@ai-server:~# installadm create-manifest -n x86-fcs -d \ -f ./s11-fcs.small.local.xml root@ai-server:~# installadm list -m -n x86-fcs Manifest Status Criteria -------- ------ -------- S11 Small fcs local Default None orig_default Inactive None The major points in this new manifest are: Install "solaris-small-server" Install a few locales less than the default.  I'm not that fluid in French or Japanese... Use my own package service as publisher, running on IP address 192.168.2.12 Install the initial release of Solaris 11:  pkg:/[email protected],5.11-0.175.0.0.0.2.0 Using a similar approach, I'll create a default profile interactively and use it as a template for a few customized building blocks, each defining a part of the overall system configuration.  The modular approach makes it easy to configure numerous clients later on: root@ai-server:~# mkdir -p /export/install/configs/profiles root@ai-server:~# cd /export/install/configs/profiles root@ai-server:~# sysconfig create-profile -o default.xml root@ai-server:~# cp default.xml general.xml; cp default.xml mars.xml root@ai-server:~# cp default.xml user.xml root@ai-server:~# vi general.xml mars.xml user.xml root@ai-server:~# more general.xml mars.xml user.xml :::::::::::::: general.xml :::::::::::::: <!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1"> <service_bundle type="profile" name="sysconfig"> <service version="1" type="service" name="system/timezone"> <instance enabled="true" name="default"> <property_group type="application" name="timezone"> <propval type="astring" name="localtime" value="Europe/Berlin"/> </property_group> </instance> </service> <service version="1" type="service" name="system/environment"> <instance enabled="true" name="init"> <property_group type="application" name="environment"> <propval type="astring" name="LANG" value="C"/> </property_group> </instance> </service> <service version="1" type="service" name="system/keymap"> <instance enabled="true" name="default"> <property_group type="system" name="keymap"> <propval type="astring" name="layout" value="US-English"/> </property_group> </instance> </service> <service version="1" type="service" name="system/console-login"> <instance enabled="true" name="default"> <property_group type="application" name="ttymon"> <propval type="astring" name="terminal_type" value="vt100"/> </property_group> </instance> </service> <service version="1" type="service" name="network/physical"> <instance enabled="true" name="default"> <property_group type="application" name="netcfg"> <propval type="astring" name="active_ncp" value="DefaultFixed"/> </property_group> </instance> </service> <service version="1" type="service" name="system/name-service/switch"> <property_group type="application" name="config"> <propval type="astring" name="default" value="files"/> <propval type="astring" name="host" value="files dns"/> <propval type="astring" name="printer" value="user files"/> </property_group> <instance enabled="true" name="default"/> </service> <service version="1" type="service" name="system/name-service/cache"> <instance enabled="true" name="default"/> </service> <service version="1" type="service" name="network/dns/client"> <property_group type="application" name="config"> <property type="net_address" name="nameserver"> <net_address_list> <value_node value="192.168.2.1"/> </net_address_list> </property> </property_group> <instance enabled="true" name="default"/> </service> </service_bundle> :::::::::::::: mars.xml :::::::::::::: <!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1"> <service_bundle type="profile" name="sysconfig"> <service version="1" type="service" name="network/install"> <instance enabled="true" name="default"> <property_group type="application" name="install_ipv4_interface"> <propval type="astring" name="address_type" value="static"/> <propval type="net_address_v4" name="static_address" value="192.168.2.100/24"/> <propval type="astring" name="name" value="net0/v4"/> <propval type="net_address_v4" name="default_route" value="192.168.2.1"/> </property_group> <property_group type="application" name="install_ipv6_interface"> <propval type="astring" name="stateful" value="yes"/> <propval type="astring" name="stateless" value="yes"/> <propval type="astring" name="address_type" value="addrconf"/> <propval type="astring" name="name" value="net0/v6"/> </property_group> </instance> </service> <service version="1" type="service" name="system/identity"> <instance enabled="true" name="node"> <property_group type="application" name="config"> <propval type="astring" name="nodename" value="mars"/> </property_group> </instance> </service> </service_bundle> :::::::::::::: user.xml :::::::::::::: <!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1"> <service_bundle type="profile" name="sysconfig"> <service version="1" type="service" name="system/config-user"> <instance enabled="true" name="default"> <property_group type="application" name="root_account"> <propval type="astring" name="login" value="root"/> <propval type="astring" name="password" value="noIWillNotTellYouMyPasswordNotEvenEncrypted"/> <propval type="astring" name="type" value="role"/> </property_group> <property_group type="application" name="user_account"> <propval type="astring" name="login" value="stefan"/> <propval type="astring" name="password" value="noIWillNotTellYouMyPasswordNotEvenEncrypted"/> <propval type="astring" name="type" value="normal"/> <propval type="astring" name="description" value="Stefan Hinker"/> <propval type="count" name="uid" value="12345"/> <propval type="count" name="gid" value="10"/> <propval type="astring" name="shell" value="/usr/bin/bash"/> <propval type="astring" name="roles" value="root"/> <propval type="astring" name="profiles" value="System Administrator"/> <propval type="astring" name="sudoers" value="ALL=(ALL) ALL"/> </property_group> </instance> </service> </service_bundle> root@ai-server:~# installadm create-profile -n x86-fcs -f general.xml root@ai-server:~# installadm create-profile -n x86-fcs -f user.xml root@ai-server:~# installadm create-profile -n x86-fcs -f mars.xml \ -c ipv4=192.168.2.100 root@ai-server:~# installadm list -p Service Name Profile ------------ ------- x86-fcs general.xml mars.xml user.xml root@ai-server:~# installadm list -n x86-fcs -p Profile Criteria ------- -------- general.xml None mars.xml ipv4 = 192.168.2.100 user.xml None Here's the idea behind these files: "general.xml" contains settings valid for all my clients.  Stuff like DNS servers, for example, which in my case will always be the same. "user.xml" only contains user definitions.  That is, a root password and a primary user.Both of these profiles will be valid for all clients (for now). "mars.xml" defines network settings for an individual client.  This profile is associated with an IP-Address.  For this to work, I'll have to tweak the DHCP-settings in the next step: root@ai-server:~# installadm create-client -e 08:00:27:AA:3D:B1 -n x86-fcs root@ai-server:~# vi /etc/inet/dhcpd4.conf root@ai-server:~# tail -5 /etc/inet/dhcpd4.conf host 080027AA3DB1 { hardware ethernet 08:00:27:AA:3D:B1; fixed-address 192.168.2.100; filename "01080027AA3DB1"; } This completes the client preparations.  I manually added the IP-Address for mars to /etc/inet/dhcpd4.conf.  This is needed for the "mars.xml" profile.  Disabling arbitrary DHCP-replies will shut up this DHCP server, making my life in a shared environment a lot more peaceful ;-)Now, I of course want this installation to be completely hands-off.  For this to work, I'll need to modify the grub boot menu for this client slightly.  You can find it in /etc/netboot.  "installadm create-client" will create a new boot menu for every client, identified by the client's MAC address.  The template for this can be found in a subdirectory with the name of the install service, /etc/netboot/x86-fcs in our case.  If you don't want to change this manually for every client, modify that template to your liking instead. root@ai-server:~# cd /etc/netboot root@ai-server:~# cp menu.lst.01080027AA3DB1 menu.lst.01080027AA3DB1.org root@ai-server:~# vi menu.lst.01080027AA3DB1 root@ai-server:~# diff menu.lst.01080027AA3DB1 menu.lst.01080027AA3DB1.org 1,2c1,2 < default=1 < timeout=10 --- > default=0 > timeout=30 root@ai-server:~# more menu.lst.01080027AA3DB1 default=1 timeout=10 min_mem64=0 title Oracle Solaris 11 11/11 Text Installer and command line kernel$ /x86-fcs/platform/i86pc/kernel/$ISADIR/unix -B install_media=htt p://$serverIP:5555//export/install/fcs,install_service=x86-fcs,install_svc_addre ss=$serverIP:5555 module$ /x86-fcs/platform/i86pc/$ISADIR/boot_archive title Oracle Solaris 11 11/11 Automated Install kernel$ /x86-fcs/platform/i86pc/kernel/$ISADIR/unix -B install=true,inst all_media=http://$serverIP:5555//export/install/fcs,install_service=x86-fcs,inst all_svc_address=$serverIP:5555,livemode=text module$ /x86-fcs/platform/i86pc/$ISADIR/boot_archive Now just boot the client off the network using PXE-boot.  For my demo purposes, that's a client from VirtualBox, of course.  That's all there's to it.  And despite the fact that this blog entry is a little longer - that wasn't that hard now, was it?

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• SQL Server and Hyper-V Dynamic Memory Part 3

  - by SQLOS Team

  In parts 1 and 2 of this series we looked at the basics of Hyper-V Dynamic Memory and SQL Server memory management. In this part Serdar looks at configuration guidelines for SQL Server memory management. Part 3: Configuration Guidelines for Hyper-V Dynamic Memory and SQL Server Now that we understand SQL Server Memory Management and Hyper-V Dynamic Memory basics, let’s take a look at general configuration guidelines in order to utilize benefits of Hyper-V Dynamic Memory in your SQL Server VMs. Requirements Host Operating System Requirements Hyper-V Dynamic Memory feature is introduced with Windows Server 2008 R2 SP1. Therefore in order to use Dynamic Memory for your virtual machines, you need to have Windows Server 2008 R2 SP1 or Microsoft Hyper-V Server 2008 R2 SP1 in your Hyper-V host. Guest Operating System Requirements In addition to this Dynamic Memory is only supported in Standard, Web, Enterprise and Datacenter editions of windows running inside VMs. Make sure that your VM is running one of these editions. For additional requirements on each operating system see “Dynamic Memory Configuration Guidelines” here. SQL Server Requirements All versions of SQL Server support Hyper-V Dynamic Memory. However, only certain editions of SQL Server are aware of dynamically changing system memory. To have a truly dynamic environment for your SQL Server VMs make sure that you are running one of the SQL Server editions listed below: ·         SQL Server 2005 Enterprise ·         SQL Server 2008 Enterprise / Datacenter Editions ·         SQL Server 2008 R2 Enterprise / Datacenter Editions Configuration guidelines for other versions of SQL Server are covered below in the FAQ section. Guidelines for configuring Dynamic Memory Parameters Here is how to configure Dynamic Memory for your SQL VMs in a nutshell: Hyper-V Dynamic Memory Parameter Recommendation Startup RAM 1 GB + SQL Min Server Memory Maximum RAM > SQL Max Server Memory Memory Buffer % 5 Memory Weight Based on performance needs   Startup RAM In order to ensure that your SQL Server VMs can start correctly, ensure that Startup RAM is higher than configured SQL Min Server Memory for your VMs. Otherwise SQL Server service will need to do paging in order to start since it will not be able to see enough memory during startup. Also note that Startup Memory will always be reserved for your VMs. This will guarantee a certain level of performance for your SQL Servers, however setting this too high will limit the consolidation benefits you’ll get out of your virtualization environment. Maximum RAM This one is obvious. If you’ve configured SQL Max Server Memory for your SQL Server, make sure that Dynamic Memory Maximum RAM configuration is higher than this value. Otherwise your SQL Server will not grow to memory values higher than the value configured for Dynamic Memory. Memory Buffer % Memory buffer configuration is used to provision file cache to virtual machines in order to improve performance. Due to the fact that SQL Server is managing its own buffer pool, Memory Buffer setting should be configured to the lowest value possible, 5%. Configuring a higher memory buffer will prevent low resource notifications from Windows Memory Manager and it will prevent reclaiming memory from SQL Server VMs. Memory Weight Memory weight configuration defines the importance of memory to a VM. Configure higher values for the VMs that have higher performance requirements. VMs with higher memory weight will have more memory under high memory pressure conditions on your host. Questions and Answers Q1 – Which SQL Server memory model is best for Dynamic Memory? The best SQL Server model for Dynamic Memory is “Locked Page Memory Model”. This memory model ensures that SQL Server memory is never paged out and it’s also adaptive to dynamically changing memory in the system. This will be extremely useful when Dynamic Memory is attempting to remove memory from SQL Server VMs ensuring no SQL Server memory is paged out. You can find instructions on configuring “Locked Page Memory Model” for your SQL Servers here. Q2 – What about other SQL Server Editions, how should I configure Dynamic Memory for them? Other editions of SQL Server do not adapt to dynamically changing environments. They will determine how much memory they should allocate during startup and don’t change this value afterwards. Therefore make sure that you configure a higher startup memory for your VM because that will be all the memory that SQL Server utilize Tune Maximum Memory and Memory Buffer based on the other workloads running on the system. If there are no other workloads consider using Static Memory for these editions. Q3 – What if I have multiple SQL Server instances in a VM? Having multiple SQL Server instances in a VM is not a general recommendation for predictable performance, manageability and isolation. In order to achieve a predictable behavior make sure that you configure SQL Min Server Memory and SQL Max Server Memory for each instance in the VM. And make sure that: ·         Dynamic Memory Startup Memory is greater than the sum of SQL Min Server Memory values for the instances in the VM ·         Dynamic Memory Maximum Memory is greater than the sum of SQL Max Server Memory values for the instances in the VM Q4 – I’m using Large Page Memory Model for my SQL Server. Can I still use Dynamic Memory? The short answer is no. SQL Server does not dynamically change its memory size when configured with Large Page Memory Model. In virtualized environments Hyper-V provides large page support by default. Most of the time, Large Page Memory Model doesn’t bring any benefits to a SQL Server if it’s running in virtualized environments. Q5 – How do I monitor SQL performance when I’m trying Dynamic Memory on my VMs? Use the performance counters below to monitor memory performance for SQL Server: Process - Working Set: This counter is available in the VM via process performance counters. It represents the actual amount of physical memory being used by SQL Server process in the VM. SQL Server – Buffer Cache Hit Ratio: This counter is available in the VM via SQL Server counters. This represents the paging being done by SQL Server. A rate of 90% or higher is desirable. Conclusion These blog posts are a quick start to a story that will be developing more in the near future. We’re still continuing our testing and investigations to provide more detailed configuration guidelines with example performance numbers with a white paper in the upcoming months. Now it’s time to give SQL Server and Hyper-V Dynamic Memory a try. Use this guidelines to kick-start your environment. See what you think about it and let us know of your experiences. - Serdar Sutay Originally posted at http://blogs.msdn.com/b/sqlosteam/

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• links for 2010-03-25

  - by Bob Rhubart

  Andy Mulholland: Grasping the single point that is powering a lot of the change "What has changed, and is changing our environment is a reversal of the technology model from a focus on data and the ‘pushing’ of this structured data towards users, to a ‘pull’ model based on users’ abilities to find unstructured data using search." -- Andy Mulholland (tags: enterprisearchitecture cloud) Pat Shepherd: SOA Checklist Is SOA the answer for your particular problem? Pat Shepherd's checklist might help you make the right call. (tags: otn oracle enterprisearchitecture soa)

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• jQuery Templates in ASP.NET - Blogs Series

  - by hajan

  In the previous days, I wrote several blog posts related to the great jQuery Templates plugin showing various examples that might help you get started working with the plugin in ASP.NET and VS.NET environment. Here is the list of all five blogs: Introduction to jQuery Templates jQuery Templates - tmpl(), template() and tmplItem() jQuery Templates - {Supported Tags} jQuery Templates with ASP.NET MVC jQuery Templates - XHTML Validation Thank you for reading and wait for my next blogs! All the best, Hajan

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• How can I install and use OBLogout?

  - by Uri Herrera

  OBLogout is a expandable, configurable, and theme-able logout script designed to be used in a Openbox desktop environment. This was taken from their Launchpad page, it was created to be used in Crunchabng Linux and I can find packages for Arch, Fedora and Debian but no information on how to Install it in Ubuntu, I can't find it in the repositories either and the only PPA is 3 years old. How can I install it and is there a possibility that it could work in other environments other than Openbox?

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• ASP.NET MVC Case Study on Jwaala’s Online Banking Solution

  Learn how Jwaala was able to provide a better solution to its banking and credit union customers by moving its Money Tracker application, to ASP.NET MVC and the Microsoft Web Platform from the LAMR (Linux, Apache, MySQL, Ruby on Rails) environment.

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• To Change the Default web browser to other Browser in Asp.net

  You can change the default web browser(IE,Opera,Safari) during web development in VS environment. you can test web page in different browser during development.

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• Regression testing with Selenium GRID

  - by Ben Adderson

  A lot of software teams out there are tasked with supporting and maintaining systems that have grown organically over time, and the web team here at Red Gate is no exception. We're about to embark on our first significant refactoring endeavour for some time, and as such its clearly paramount that the code be tested thoroughly for regressions. Unfortunately we currently find ourselves with a codebase that isn't very testable - the three layers (database, business logic and UI) are currently tightly coupled. This leaves us with the unfortunate problem that, in order to confidently refactor the code, we need unit tests. But in order to write unit tests, we need to refactor the code :S To try and ease the initial pain of decoupling these layers, I've been looking into the idea of using UI automation to provide a sort of system-level regression test suite. The idea being that these tests can help us identify regressions whilst we work towards a more testable codebase, at which point the more traditional combination of unit and integration tests can take over. Ending up with a strong battery of UI tests is also a nice bonus :) Following on from my previous posts (here, here and here) I knew I wanted to use Selenium. I also figured that this would be a good excuse to put my xUnit [Browser] attribute to good use. Pretty quickly, I had a raft of tests that looked like the following (this particular example uses Reflector Pro). In a nut shell the test traverses our shopping cart and, for a particular combination of number of users and months of support, checks that the price calculations all come up with the correct values. [BrowserTheory] [Browser(Browsers.Firefox3_6, "http://www.red-gate.com")] public void Purchase1UserLicenceNoSupport(SeleniumProvider seleniumProvider) {     //Arrange     _browser = seleniumProvider.GetBrowser();     _browser.Open("http://www.red-gate.com/dynamic/shoppingCart/ProductOption.aspx?Product=ReflectorPro");                  //Act     _browser = ShoppingCartHelpers.TraverseShoppingCart(_browser, 1, 0, ".NET Reflector Pro");     //Assert     var priceResult = PriceHelpers.GetNewPurchasePrice(db, "ReflectorPro", 1, 0, Currencies.Euros);         Assert.Equal(priceResult.Price, _browser.GetText("ctl00_content_InvoiceShoppingItemRepeater_ctl01_Price"));     Assert.Equal(priceResult.Tax, _browser.GetText("ctl00_content_InvoiceShoppingItemRepeater_ctl02_Tax"));     Assert.Equal(priceResult.Total, _browser.GetText("ctl00_content_InvoiceShoppingItemRepeater_ctl02_Total")); } These tests are pretty concise, with much of the common code in the TraverseShoppingCart() and GetNewPurchasePrice() methods. The (inevitable) problem arose when it came to execute these tests en masse. Selenium is a very slick tool, but it can't mask the fact that UI automation is very slow. To give you an idea, the set of cases that covers all of our products, for all combinations of users and support, came to 372 tests (for now only considering purchases in dollars). In the world of automated integration tests, that's a very manageable number. For unit tests, it's a trifle. However for UI automation, those 372 tests were taking just over two hours to run. Two hours may not sound like a lot, but those cases only cover one of the three currencies we deal with, and only one of the many different ways our systems can be asked to calculate a price. It was already pretty clear at this point that in order for this approach to be viable, I was going to have to find a way to speed things up. Up to this point I had been using Selenium Remote Control to automate Firefox, as this was the approach I had used previously and it had worked well. Fortunately,  the guys at SeleniumHQ also maintain a tool for executing multiple Selenium RC tests in parallel: Selenium Grid. Selenium Grid uses a central 'hub' to handle allocation of Selenium tests to individual RCs. The Remote Controls simply register themselves with the hub when they start, and then wait to be assigned work. The (for me) really clever part is that, as far as the client driver library is concerned, the grid hub looks exactly the same as a vanilla remote control. To create a new browser session against Selenium RC, the following C# code suffices: new DefaultSelenium("localhost", 4444, "*firefox", "http://www.red-gate.com"); This assumes that the RC is running on the local machine, and is listening on port 4444 (the default). Assuming the hub is running on your local machine, then to create a browser session in Selenium Grid, via the hub rather than directly against the control, the code is exactly the same! Behind the scenes, the hub will take this request and hand it off to one of the registered RCs that provides the "*firefox" execution environment. It will then pass all communications back and forth between the test runner and the remote control transparently. This makes running existing RC tests on a Selenium Grid a piece of cake, as the developers intended. For a more detailed description of exactly how Selenium Grid works, see this page. Once I had a test environment capable of running multiple tests in parallel, I needed a test runner capable of doing the same. Unfortunately, this does not currently exist for xUnit (boo!). MbUnit on the other hand, has the concept of concurrent execution baked right into the framework. So after swapping out my assembly references, and fixing up the resulting mismatches in assertions, my example test now looks like this: [Test] public void Purchase1UserLicenceNoSupport() {    //Arrange    ISelenium browser = BrowserHelpers.GetBrowser();    var db = DbHelpers.GetWebsiteDBDataContext();    browser.Start();    browser.Open("http://www.red-gate.com/dynamic/shoppingCart/ProductOption.aspx?Product=ReflectorPro");                 //Act     browser = ShoppingCartHelpers.TraverseShoppingCart(browser, 1, 0, ".NET Reflector Pro");    var priceResult = PriceHelpers.GetNewPurchasePrice(db, "ReflectorPro", 1, 0, Currencies.Euros);    //Assert     Assert.AreEqual(priceResult.Price, browser.GetText("ctl00_content_InvoiceShoppingItemRepeater_ctl01_Price"));     Assert.AreEqual(priceResult.Tax, browser.GetText("ctl00_content_InvoiceShoppingItemRepeater_ctl02_Tax"));     Assert.AreEqual(priceResult.Total, browser.GetText("ctl00_content_InvoiceShoppingItemRepeater_ctl02_Total")); } This is pretty much the same as the xUnit version. The exceptions are that the attributes have changed,  the //Arrange phase now has to handle setting up the ISelenium object, as the attribute that previously did this has gone away, and the test now sets up its own database connection. Previously I was using a shared database connection, but this approach becomes more complicated when tests are being executed concurrently. To avoid complexity each test has its own connection, which it is responsible for closing. For the sake of readability, I snipped out the code that closes the browser session and the db connection at the end of the test. With all that done, there was only one more step required before the tests would execute concurrently. It is necessary to tell the test runner which tests are eligible to run in parallel, via the [Parallelizable] attribute. This can be done at the test, fixture or assembly level. Since I wanted to run all tests concurrently, I marked mine at the assembly level in the AssemblyInfo.cs using the following: [assembly: DegreeOfParallelism(3)] [assembly: Parallelizable(TestScope.All)] The second attribute marks all tests in the assembly as [Parallelizable], whilst the first tells the test runner how many concurrent threads to use when executing the tests. I set mine to three since I was using 3 RCs in separate VMs. With everything now in place, I fired up the Icarus* test runner that comes with MbUnit. Executing my 372 tests three at a time instead of one at a time reduced the running time from 2 hours 10 minutes, to 55 minutes, that's an improvement of about 58%! I'd like to have seen an improvement of 66%, but I can understand that either inefficiencies in the hub code, my test environment or the test runner code (or some combination of all three most likely) contributes to a slightly diminished improvement. That said, I'd love to hear about any experience you have in upping this efficiency. Ultimately though, it was a saving that was most definitely worth having. It makes regression testing via UI automation a far more plausible prospect. The other obvious point to make is that this approach scales far better than executing tests serially. So if ever we need to improve performance, we just register additional RC's with the hub, and up the DegreeOfParallelism. *This was just my personal preference for a GUI runner. The MbUnit/Gallio installer also provides a command line runner, a TestDriven.net runner, and a Resharper 4.5 runner. For now at least, Resharper 5 isn't supported.

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• Android SDK PATH Error: doesn´t find home directory [migrated]

  - by THeo Oliveira

  I use Ubuntu 12.10 and I tried to follow this guide Install android sdk and eclipse in Ubuntu 12.04 but I keep getting this error: Error: The AVD manager normally uses the user's profile directory to store AVD files. However it failed to find the default profile directory. To fix this, please set the environment variable ANDROID_SDK_HOME to a valid path such as ¨~¨. Any ideas how can I fix this?

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• The hidden cost of interrupting knowledge workers

  - by Piet

  The November issue of pragpub has an interesting article on interruptions. The article is written by Brian Tarbox, who also mentions the article on his blog. I like the subtitle: ‘Simple Strategies for Avoiding Dumping Your Mental Stack’. Brian talks about the effective cost of interrupting a ‘knowledge worker’, often with trivial questions or distractions. In the eyes of the interruptor, the interruption only costs the time the interrupted had to listen to the question and give an answer. However, depending on what the interrupted was doing at the time, getting fully immersed in their task again might take up to 15-20 minutes. Enough interruptions might even cause a knowledge worker to mentally call it a day. According to this article interruptions can consume about 28% of a knowledge worker’s time, translating in a $588 billion loss for US companies each year. Looking for a new developer to join your team? Ever thought about optimizing your team’s environment and the way they work instead? Making non knowledge workers aware You can’t. Well, I haven’t succeeded yet. And believe me: I’ve tried. When you’ve got a simple way to really increase your productivity (’give me 2 hours of uninterrupted time a day’) it wouldn’t be right not to tell your boss or team-leader about it. The problem is: only productive knowledge workers seem to understand this. People who don’t fall into this category just seem to think you’re joking, being arrogant or anti-social when you tell them the interruptions can really have an impact on your productivity. Also, knowledge workers often work in a very concentrated mental state which is described here as: It is the same mindfulness as ecstatic lovemaking, the merging of two into a fluidly harmonious one. The hallmark of flow is a feeling of spontaneous joy, even rapture, while performing a task. Yes, coding can be addictive and if you’re interrupting a programmer at the wrong moment, you’re effectively bringing down a junkie from his high in just a few seconds. This can result in seemingly arrogant, almost aggressive reactions. How to make people aware of the production-cost they’re inflicting: I’ve been often pondering that question myself. The article suggests that solutions based on that question never seem to work. To be honest: I’ve never even been able to find a half decent solution for this question. People who are not in this situations just don’t understand the issue, no matter how you try to explain it. Fun (?) thing I’ve noticed: Programmers or IT people in general who don’t get this are often the kind of people who just don’t get anything done. Interrupt handling (interruption management?) IRL Have non-urgent questions handled in a non-interruptive way It helps a bit to educate people into using non-interruptive ways to ask questions: “duh, I have no idea, but I’m a bit busy here now could you put it in an email so I don’t forget?”. Eventually, a considerable amount of people will skip interrupting you and just send an email right away. Some stubborn-headed people however will continue to just interrupt you, saying “you’re 10 meters from my desk, why can’t we just talk?”. Just remember to disable your email notifications, it can be hard to resist opening your email client when you know a new email just arrived. Use Do Not Disturb signals When working in a group of programmers, often the unofficial sign you can only be interrupted for something important is to put on headphones. And when the environment is quiet enough, often people aren’t even listening to music. Otherwise music can help to block the indirect distractions (someone else talking on the phone or tapping their feet). You might get a “they’re all just surfing and listening to music”-reaction from outsiders though. Peopleware talks about a team where the no-interruption sign was placing a shawl on the desk. If I remember correctly, I am unable to locate my copy of this really excellent must-read book. If you have all standardized on the same IM tool, maybe that tool has a ‘do not disturb’ setting. Also some phone-systems have a ‘DND’ (do not disturb) setting. Hide Brian offers a number of good suggestions, some obvious like: hide away somewhere they can’t find you. Not sure how long it’ll be till someone thinks you’re just taking a nap somewhere though. Also, this often isn’t possible or your boss might not understand this. And if you really get caught taking a nap, make sure to explain that your were powernapping. Counter-act interruptions Another suggestion he offers is when you’re being interrupted to just hold up your hand, blocking the interruption, and at least giving you time to finish your sentence or your block/line of code. The last suggestion works more as a way to make it obvious to the interruptor that they really are interrupting your work and to offload some of the cost on the interruptor. In practice, this can also helps you cool down a bit so you don’t start saying nasty things to the interruptor. Unfortunately I’ve sometimes been confronted with people who just ignore this signal and keep talking, as if they’re sure that whatever they’ve got to say is really worth listening to and without a doubt more important than anything you might be doing. This behaviour usually leaves me speechless (not good when someone just asked a question). I’ve noticed that these people are usually also the first to complain when being interrupted themselves. They’re generally not very liked as colleagues, so try not to imitate their behaviour. TDD as a way to minimize recovery time I don’t like Test Driven Development. Mainly for only one reason: It interrupts flow. At least, that’s what it does for me, but maybe I’m just not grown used to TDD yet. BUT a positive effect TDD has on me when I have to work in an interruptive environment and can’t really get into the ‘flow’ (also supposedly called ‘the zone’ by software developers, although I’ve never heard it 1st hand), TDD helps me to concentrate on the tasks at hand and helps me to get back at work after an interruption. I feel when using TDD, I can get by without the need for being totally ‘in’ the project and I can be reasonably productive without obtaining ‘flow’. Do you have a suggestion on how to make people aware of the concept of ‘flow’ and the cost of interruptions? (without looking like an arrogant ass or a weirdo)

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• Red Gate Coder interviews: Robin Hellen

  - by Michael Williamson

  Robin Hellen is a test engineer here at Red Gate, and is also the latest coder I’ve interviewed. We chatted about debugging code, the roles of software engineers and testers, and why Vala is currently his favourite programming language. How did you get started with programming?It started when I was about six. My dad’s a professional programmer, and he gave me and my sister one of his old computers and taught us a bit about programming. It was an old Amiga 500 with a variant of BASIC. I don’t think I ever successfully completed anything! It was just faffing around. I didn’t really get anywhere with it.But then presumably you did get somewhere with it at some point.At some point. The PC emerged as the dominant platform, and I learnt a bit of Visual Basic. I didn’t really do much, just a couple of quick hacky things. A bit of demo animation. Took me a long time to get anywhere with programming, really.When did you feel like you did start to get somewhere?I think it was when I started doing things for someone else, which was my sister’s final year of university project. She called up my dad two days before she was due to submit, saying “We need something to display a graph!”. Dad says, “I’m too busy, go talk to your brother”. So I hacked up this ugly piece of code, sent it off and they won a prize for that project. Apparently, the graph, the bit that I wrote, was the reason they won a prize! That was when I first felt that I’d actually done something that was worthwhile. That was my first real bit of code, and the ugliest code I’ve ever written. It’s basically an array of pre-drawn line elements that I shifted round the screen to draw a very spikey graph.When did you decide that programming might actually be something that you wanted to do as a career?It’s not really a decision I took, I always wanted to do something with computers. And I had to take a gap year for uni, so I was looking for twelve month internships. I applied to Red Gate, and they gave me a job as a tester. And that’s where I really started having to write code well. To a better standard that I had been up to that point.How did you find coming to Red Gate and working with other coders?I thought it was really nice. I learnt so much just from other people around. I think one of the things that’s really great is that people are just willing to help you learn. Instead of “Don’t you know that, you’re so stupid”, it’s “You can just do it this way”.If you could go back to the very start of that internship, is there something that you would tell yourself?Write shorter code. I have a tendency to write massive, many-thousand line files that I break out of right at the end. And then half-way through a project I’m doing something, I think “Where did I write that bit that does that thing?”, and it’s almost impossible to find. I wrote some horrendous code when I started. Just that principle, just keep things short. Even if looks a bit crazy to be jumping around all over the place all of the time, it’s actually a lot more understandable.And how do you hold yourself to that?Generally, if a function’s going off my screen, it’s probably too long. That’s what I tell myself, and within the team here we have code reviews, so the guys I’m with at the moment are pretty good at pulling me up on, “Doesn’t that look like it’s getting a bit long?”. It’s more just the subjective standard of readability than anything.So you’re an advocate of code review?Yes, definitely. Both to spot errors that you might have made, and to improve your knowledge. The person you’re reviewing will say “Oh, you could have done it that way”. That’s how we learn, by talking to others, and also just sharing knowledge of how your project works around the team, or even outside the team. Definitely a very firm advocate of code reviews.Do you think there’s more we could do with them?I don’t know. We’re struggling with how to add them as part of the process without it becoming too cumbersome. We’ve experimented with a few different ways, and we’ve not found anything that just works.To get more into the nitty gritty: how do you like to debug code?The first thing is to do it in my head. I’ll actually think what piece of code is likely to have caused that error, and take a quick look at it, just to see if there’s anything glaringly obvious there. The next thing I’ll probably do is throw in print statements, or throw some exceptions from various points, just to check: is it going through the code path I expect it to? A last resort is to actually debug code using a debugger.Why is the debugger the last resort?Probably because of the environments I learnt programming in. VB and early BASIC didn’t have much of a debugger, the only way to find out what your program was doing was to add print statements. Also, because a lot of the stuff I tend to work with is non-interactive, if it’s something that takes a long time to run, I can throw in the print statements, set a run off, go and do something else, and look at it again later, rather than trying to remember what happened at that point when I was debugging through it. So it also gives me the record of what happens. I hate just sitting there pressing F5, F5, continually. If you’re having to find out what your code is doing at each line, you’ve probably got a very wrong mental model of what your code’s doing, and you can find that out just as easily by inspecting a couple of values through the print statements.If I were on some codebase that you were also working on, what should I do to make it as easy as possible to understand?I’d say short and well-named methods. The one thing I like to do when I’m looking at code is to find out where a value comes from, and the more layers of indirection there are, particularly DI [dependency injection] frameworks, the harder it is to find out where something’s come from. I really hate that. I want to know if the value come from the user here or is a constant here, and if I can’t find that out, that makes code very hard to understand for me.As a tester, where do you think the split should lie between software engineers and testers?I think the split is less on areas of the code you write and more what you’re designing and creating. The developers put a structure on the code, while my major role is to say which tests we should have, whether we should test that, or it’s not worth testing that because it’s a tiny function in code that nobody’s ever actually going to see. So it’s not a split in the code, it’s a split in what you’re thinking about. Saying what code we should write, but alternatively what code we should take out.In your experience, do the software engineers tend to do much testing themselves?They tend to control the lowest layer of tests. And, depending on how the balance of people is in the team, they might write some of the higher levels of test. Or that might go to the testers. I’m the only tester on my team with three other developers, so they’ll be writing quite a lot of the actual test code, with input from me as to whether we should test that functionality, whereas on other teams, where it’s been more equal numbers, the testers have written pretty much all of the high level tests, just because that’s the best use of resource.If you could shuffle resources around however you liked, do you think that the developers should be writing those high-level tests?I think they should be writing them occasionally. It helps when they have an understanding of how testing code works and possibly what assumptions we’ve made in tests, and they can say “actually, it doesn’t work like that under the hood so you’ve missed this whole area”. It’s one of those agile things that everyone on the team should be at least comfortable doing the various jobs. So if the developers can write test code then I think that’s a very good thing.So you think testers should be able to write production code?Yes, although given most testers skills at coding, I wouldn’t advise it too much! I have written a few things, and I did make a few changes that have actually gone into our production code base. They’re not necessarily running every time but they are there. I think having that mix of skill sets is really useful. In some ways we’re using our own product to test itself, so being able to make those changes where it’s not working saves me a round-trip through the developers. It can be really annoying if the developers have no time to make a change, and I can’t touch the code.If the software engineers are consistently writing tests at all levels, what role do you think the role of a tester is?I think on a team like that, those distinctions aren’t quite so useful. There’ll be two cases. There’s either the case where the developers think they’ve written good tests, but you still need someone with a test engineer mind-set to go through the tests and validate that it’s a useful set, or the correct set for that code. Or they won’t actually be pure developers, they’ll have that mix of test ability in there.I think having slightly more distinct roles is useful. When it starts to blur, then you lose that view of the tests as a whole. The tester job is not to create tests, it’s to validate the quality of the product, and you don’t do that just by writing tests. There’s more things you’ve got to keep in your mind. And I think when you blur the roles, you start to lose that end of the tester.So because you’re working on those features, you lose that holistic view of the whole system?Yeah, and anyone who’s worked on the feature shouldn’t be testing it. You always need to have it tested it by someone who didn’t write it. Otherwise you’re a bit too close and you assume “yes, people will only use it that way”, but the tester will come along and go “how do people use this? How would our most idiotic user use this?”. I might not test that because it might be completely irrelevant. But it’s coming in and trying to have a different set of assumptions.Are you a believer that it should all be automated if possible?Not entirely. So an automated test is always better than a manual test for the long-term, but there’s still nothing that beats a human sitting in front of the application and thinking “What could I do at this point?”. The automated test is very good but they follow that strict path, and they never check anything off the path. The human tester will look at things that they weren’t expecting, whereas the automated test can only ever go “Is that value correct?” in many respects, and it won’t notice that on the other side of the screen you’re showing something completely wrong. And that value might have been checked independently, but you always find a few odd interactions when you’re going through something manually, and you always need to go through something manually to start with anyway, otherwise you won’t know where the important bits to write your automation are.When you’re doing that manual testing, do you think it’s important to do that across the entire product, or just the bits that you’ve touched recently?I think it’s important to do it mostly on the bits you’ve touched, but you can’t ignore the rest of the product. Unless you’re dealing with a very, very self-contained bit, you’re almost always encounter other bits of the product along the way. Most testers I know, even if they are looking at just one path, they’ll keep open and move around a bit anyway, just because they want to find something that’s broken. If we find that your path is right, we’ll go out and hunt something else.How do you think this fits into the idea of continuously deploying, so long as the tests pass?With deploying a website it’s a bit different because you can always pull it back. If you’re deploying an application to customers, when you’ve released it, it’s out there, you can’t pull it back. Someone’s going to keep it, no matter how hard you try there will be a few installations that stay around. So I’d always have at least a human element on that path. With websites, you could probably automate straight out, or at least straight out to an internal environment or a single server in a cloud of fifty that will serve some people. But I don’t think you should release to everyone just on automated tests passing.You’ve already mentioned using BASIC and C# — are there any other languages that you’ve used?I’ve used a few. That’s something that has changed more recently, I’ve become familiar with more languages. Before I started at Red Gate I learnt a bit of C. Then last year, I taught myself Python which I actually really enjoyed using. I’ve also come across another language called Vala, which is sort of a C#-like language. It’s basically a pre-processor for C, but it has very nice syntax. I think that’s currently my favourite language.Any particular reason for trying Vala?I have a completely Linux environment at home, and I’ve been looking for a nice language, and C# just doesn’t cut it because I won’t touch Mono. So, I was looking for something like C# but that was useable in an open source environment, and Vala’s what I found. C#’s got a few features that Vala doesn’t, and Vala’s got a few features where I think “It would be awesome if C# had that”.What are some of the features that it’s missing?Extension methods. And I think that’s the only one that really bugs me. I like to use them when I’m writing C# because it makes some things really easy, especially with libraries that you can’t touch the internals of. It doesn’t have method overloading, which is sometimes annoying.Where it does win over C#?Everything is non-nullable by default, you never have to check that something’s unexpectedly null.Also, Vala has code contracts. This is starting to come in C# 4, but the way it works in Vala is that you specify requirements in short phrases as part of your function signature and they stick to the signature, so that when you inherit it, it has exactly the same code contract as the base one, or when you inherit from an interface, you have to match the signature exactly. Just using those makes you think a bit more about how you’re writing your method, it’s not an afterthought when you’ve got contracts from base classes given to you, you can’t change it. Which I think is a lot nicer than the way C# handles it. When are those actually checked?They’re checked both at compile and run-time. The compile-time checking isn’t very strong yet, it’s quite a new feature in the compiler, and because it compiles down to C, you can write C code and interface with your methods, so you can bypass that compile-time check anyway. So there’s an extra runtime check, and if you violate one of the contracts at runtime, it’s game over for your program, there’s no exception to catch, it’s just goodbye!One thing I dislike about C# is the exceptions. You write a bit of code and fifty exceptions could come from any point in your ten lines, and you can’t mentally model how those exceptions are going to come out, and you can’t even predict them based on the functions you’re calling, because if you’ve accidentally got a derived class there instead of a base class, that can throw a completely different set of exceptions. So I’ve got no way of mentally modelling those, whereas in Vala they’re checked like Java, so you know only these exceptions can come out. You know in advance the error conditions.I think Raymond Chen on Old New Thing says “the only thing you know when you throw an exception is that you’re in an invalid state somewhere in your program, so just kill it and be done with it!”You said you’ve also learnt bits of Python. How did you find that compared to Vala and C#?Very different because of the dynamic typing. I’ve been writing a website for my own use. I’m quite into photography, so I take photos off my camera, post-process them, dump them in a file, and I get a webpage with all my thumbnails. So sort of like Picassa, but written by myself because I wanted something to learn Python with. There are some things that are really nice, I just found it really difficult to cope with the fact that I’m not quite sure what this object type that I’m passed is, I might not ever be sure, so it can randomly blow up on me. But once I train myself to ignore that and just say “well, I’m fairly sure it’s going to be something that looks like this, so I’ll use it like this”, then it’s quite nice.Any particular features that you’ve appreciated?I don’t like any particular feature, it’s just very straightforward to work with. It’s very quick to write something in, particularly as you don’t have to worry that you’ve changed something that affects a different part of the program. If you have, then that part blows up, but I can get this part working right now.If you were doing a big project, would you be willing to do it in Python rather than C# or Vala?I think I might be willing to try something bigger or long term with Python. We’re currently doing an ASP.NET MVC project on C#, and I don’t like the amount of reflection. There’s a lot of magic that pulls values out, and it’s all done under the scenes. It’s almost managed to put a dynamic type system on top of C#, which in many ways destroys the language to me, whereas if you’re already in a dynamic language, having things done dynamically is much more natural. In many ways, you get the worst of both worlds. I think for web projects, I would go with Python again, whereas for anything desktop, command-line or GUI-based, I’d probably go for C# or Vala, depending on what environment I’m in.It’s the fact that you can gain from the strong typing in ways that you can’t so much on the web app. Or, in a web app, you have to use dynamic typing at some point, or you have to write a hell of a lot of boilerplate, and I’d rather use the dynamic typing than write the boilerplate.What do you think separates great programmers from everyone else?Probably design choices. Choosing to write it a piece of code one way or another. For any given program you ask me to write, I could probably do it five thousand ways. A programmer who is capable will see four or five of them, and choose one of the better ones. The excellent programmer will see the largest proportion and manage to pick the best one very quickly without having to think too much about it. I think that’s probably what separates, is the speed at which they can see what’s the best path to write the program in. More Red Gater Coder interviews

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• Accessing JMX for Oracle WebLogic 11g

  - by Anthony Shorten

  In Oracle Utilities Application Framework V4, we use the latest Oracle WebLogic release (11g). The instructions below illustrate a way of allowing a console like jconsole to remotely monitor and manage Oracle WebLogic using the JMX Mbeans. Typically management of Oracle WebLogic is done from Oracle Enterprise Manager or the Oracle Weblogic console application but you can also use JMX. To access the JMX capability for Oracle WebLogic 11g, for an Oracle Utilities Application Framework based product, using a JMX console (such as jconsole) the following process needs to be performed: Enable the JMX Management Server in the Oracle WebLogic console at splapp - Configuration - General - Advanced Settings option. Enable both Compatibility Mbean Server Enabled and Management EJB Enabled (this enables the legacy and new JMX interface). Save the changes This change will require a restart. In the startup of the Oracle WebLogic server in the $SPLSYSTEMLOGS/myserver.log (or %SPLESYSTEMLOGS%\myserver.log on Windows) you will see the BEA-149512 message indicating the Mbean servers have been started. The message will indicate the JMX URL that can be used to access the JMX Mbeans. The URL is in the format: service:jmx:iiop://host:port/jndi/mbeanserver where: host - Oracle WebLogic host name port - Oracle WebLogic port number mbeanserver - Mbean Server to access. Valid Values: weblogic.management.mbeanservers.runtime weblogic.management.mbeanservers.edit weblogic.management.mbeanservers.domainruntime For illustrative purposes we will use the domainruntime Mbean. Ensure that you execute the splenviron[.sh] utility to set the appropriate environment variables for the desired environment. Execute the following jconsole command to initiate the connection to the JMX Mbean server Windows: jconsole -J-Djava.class.path=%JAVA_HOME%\lib\jconsole.jar;%WL_HOME%\server\lib\wljmxclient.jar -J-Djmx.remote.protocol.provider.pkgs=weblogic.management.remote Linux/Unix jconsole -J-Djava.class.path=$JAVA_HOME/lib/jconsole.jar;$WL_HOME/server/lib/wljmxclient.jar -J-Djmx.remote.protocol.provider.pkgs=weblogic.management.remote You will see a New Connection Dialog. Specify the URL from the previous steps into the Remote process (i.,e. service:jmx:iiop...). The credentials are the credentials specified for the Oracle WebLogic console. You are now able to view the JMX classes available. Here is an example from my demonstration machine: Refer to the Oracle WebLogic Mbean documentation to understand the output.

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• The Case for Gnome Shell

  <b>WorksWithU:</b> "A couple weeks ago, I wrote some posts on GNOME Shell which included a number of criticisms of the desktop environment that will likely become Ubuntu'S default at some point in the future. Jon McCann, lead designer for GNOME Shell, recently got in touch to offer his responses to the problems I found with the new interface"

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• Windows Azure Use Case: Fast Acquisitions

  - by BuckWoody

  This is one in a series of posts on when and where to use a distributed architecture design in your organization's computing needs. You can find the main post here: http://blogs.msdn.com/b/buckwoody/archive/2011/01/18/windows-azure-and-sql-azure-use-cases.aspx  Description: Many organizations absorb, take over or merge with other organizations. In these cases, one of the most difficult parts of the process is the merging or changing of the IT systems that the employees use to do their work, process payments, and even get paid. Normally this means that the two companies have disparate systems, and several approaches can be used to have the two organizations use technology between them. An organization may choose to retain both systems, and manage them separately. The advantage here is speed, and keeping the profit/loss sheets separate. Another choice is to slowly “sunset” or stop using one organization’s system, and cutting to the other system immediately or at a later date. Although a popular choice, one of the most difficult methods is to extract data and processes from one system and import it into the other. Employees at the transitioning system have to be trained on the new one, the data must be examined and cleansed, and there is inevitable disruption when this happens. Still another option is to integrate the systems. This may prove to be as much work as a transitional strategy, but may have less impact on the users or the balance sheet. Implementation: A distributed computing paradigm can be a good strategic solution to most of these strategies. Retaining both systems is made more simple by allowing the users at the second organization immediate access to the new system, because security accounts can be created quickly inside an application. There is no need to set up a VPN or any other connections than just to the Internet. Having the users stop using one system and start with the other is also simple in Windows Azure for the same reason. Extracting data to Azure holds the same limitations as an on-premise system, and may even be more problematic because of the large data transfers that might be required. In a distributed environment, you pay for the data transfer, so a mixed migration strategy is not recommended. However, if the data is slowly migrated over time with a defined cutover, this can be an effective strategy. If done properly, an integration strategy works very well for a distributed computing environment like Windows Azure. If the Azure code is architected as a series of services, then endpoints can expose the service into and out of not only the Azure platform, but internally as well. This is a form of the Hybrid Application use-case documented here. References: Designing for Cloud Optimized Architecture: http://blogs.msdn.com/b/dachou/archive/2011/01/23/designing-for-cloud-optimized-architecture.aspx 5 Enterprise steps for adopting a Platform as a Service: http://blogs.msdn.com/b/davidmcg/archive/2010/12/02/5-enterprise-steps-for-adopting-a-platform-as-a-service.aspx?wa=wsignin1.0

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• Developer’s Life – Disaster Lessons – Notes from the Field #039

  - by Pinal Dave

  [Note from Pinal]: This is a 39th episode of Notes from the Field series. What is the best solution do you have when you encounter a disaster in your organization. Now many of you would answer that in this scenario you would have another standby machine or alternative which you will plug in. Now let me ask second question – What would you do if you as an individual faces disaster?  In this episode of the Notes from the Field series database expert Mike Walsh explains a very crucial issue we face in our career, which is not technical but more to relate to human nature. Read on this may be the best blog post you might read in recent times. Howdy! When it was my turn to share the Notes from the Field last time, I took a departure from my normal technical content to talk about Attitude and Communication.(http://blog.sqlauthority.com/2014/05/08/developers-life-attitude-and-communication-they-can-cause-problems-notes-from-the-field-027/) Pinal said it was a popular topic so I hope he won’t mind if I stick with Professional Development for another of my turns at sharing some information here. Like I said last time, the “soft skills” of the IT world are often just as important – sometimes more important – than the technical skills. As a consultant with Linchpin People – I see so many situations where the professional skills I’ve gained and use are more valuable to clients than knowing the best way to tune a query. Today I want to continue talking about professional development and tell you about the way I almost got myself hit by a train – and why that matters in our day jobs. Sometimes we can learn a lot from disasters. Whether we caused them or someone else did. If you are interested in learning about some of my observations in these lessons you can see more where I talk about lessons from disasters on my blog. For now, though, onto how I almost got my vehicle hit by a train… The Train Crash That Almost Was…. My family and I own a little schoolhouse building about a 10 mile drive away from our house. We use it as a free resource for families in the area that homeschool their children – so they can have some class space. I go up there a lot to check in on the property, to take care of the trash and to do work on the property. On the way there, there is a very small Stop Sign controlled railroad intersection. There is only two small freight trains a day passing there. Actually the same train, making a journey south and then back North. That’s it. This road is a small rural road, barely ever a second car driving in the neighborhood there when I am. The stop sign is pretty much there only for the train crossing. When we first bought the building, I was up there a lot doing renovations on the property. Being familiar with the area, I am also familiar with the train schedule and know the tracks are normally free of trains. So I developed a bad habit. You see, I’d approach the stop sign and slow down as I roll through it. Sometimes I’d do a quick look and come to an “almost” stop there but keep on going. I let my impatience and complacency take over. And that is because most of the time I was going there long after the train was done for the day or in between the runs. This habit became pretty well established after a couple years of driving the route. The behavior reinforced a bit by the success ratio. I saw others doing it as well from the neighborhood when I would happen to be there around the time another car was there. Well. You already know where this ends up by the title and backstory here. A few months ago I came to that little crossing, and I started to do the normal routine. I’d pretty much stopped looking in some respects because of the pattern I’d gotten into.  For some reason I looked and heard and saw the train slowly approaching and slammed on my brakes and stopped. It was an abrupt stop, and it was close. I probably would have made it okay, but I sat there thinking about lessons for IT professionals from the situation once I started breathing again and watched the cars loaded with sand and propane slowly labored down the tracks… Here are Those Lessons… It’s easy to get stuck into a routine – That isn’t always bad. Except when it’s a bad routine. Momentum and inertia are powerful. Once you have a habit and a routine developed – it’s really hard to break that. Make sure you are setting the right routines and habits TODAY. What almost dangerous things are you doing today? How are you almost messing up your production environment today? Stop doing that. Be Deliberate – (Even when you are the only one) – Like I said – a lot of people roll through that stop sign. Perhaps the neighbors or other drivers think “why is he fully stopping and looking… The train only comes two times a day!” – they can think that all they want. Through deliberate actions and forcing myself to pay attention, I will avoid that oops again. Slow down. Take a deep breath. Be Deliberate in your job. Pay attention to the small stuff and go out of your way to be careful. It will save you later. Be Observant – Keep your eyes open. By looking around, observing the situation and understanding what your servers, databases, users and vendors are doing – you’ll notice when something is out of place. But if you don’t know what is normal, if you don’t look to make sure nothing has changed – that train will come and get you. Where can you be more observant? What warning signs are you ignoring in your environment today? In the IT world – trains are everywhere. Projects move fast. Decisions happen fast. Problems turn from a warning sign to a disaster quickly. If you get stuck in a complacent pattern of “Everything is okay, it always has been and always will be” – that’s the time that you will most likely get stuck in a bad situation. Don’t let yourself get complacent, don’t let your team get complacent. That will lead to being proactive. And a proactive environment spends less money on consultants for troubleshooting problems you should have seen ahead of time. You can spend your money and IT budget on improving for your customers. If you want to get started with performance analytics and triage of virtualized SQL Servers with the help of experts, read more over at Fix Your SQL Server. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: Notes from the Field, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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• PERT shows relationships between defined tasks in a project without taking into consideration a time line

  The program evaluation and review technique (PERT) shows relationships between defined tasks in a project without taking into consideration a time line. This chart is an excellent way to identify dependencies of tasks based on other tasks. This chart allows project managers to identify the critical path of a project to minimize any time delays to the project. According to Craig Borysowich in his article “Pros & Cons of the PERT/CPM Method stated the following advantages and disadvantages: “PERT/CPM has the following advantages: A PERT/CPM chart explicitly defines and makes visible dependencies (precedence relationships) between the WBS elements, PERT/CPM facilitates identification of the critical path and makes this visible, PERT/CPM facilitates identification of early start, late start, and slack for each activity, PERT/CPM provides for potentially reduced project duration due to better understanding of dependencies leading to improved overlapping of activities and tasks where feasible.  PERT/CPM has the following disadvantages: There can be potentially hundreds or thousands of activities and individual dependency relationships, The network charts tend to be large and unwieldy requiring several pages to print and requiring special size paper, The lack of a timeframe on most PERT/CPM charts makes it harder to show status although colors can help (e.g., specific color for completed nodes), When the PERT/CPM charts become unwieldy, they are no longer used to manage the project.” (Borysowich, 2008) Traditionally PERT charts are used in the initial planning of a project like in a project that is utilizing the waterfall approach. Once the chart was created then project managers could further analyze this data to determine the earliest start time for each stage in the project. This is important because this information can be used to help forecast resource needs during a project and where in the project. However, the agile environment can approach this differently because of their constant need to be in contact with the client and the other stakeholders.  The PERT chart can also be used during project iteration to determine what is to be worked on next, such as a prioritized To-Do list a wife would give her husband at the start of a weekend. In my personal opinion, the COTS-centric environment would not really change how a company uses a PERT chart in their day to day work. The only thing I can is that there would be less tasks to include in the chart because the functionally milestones are already completed when the components are purchased. References: http://www.netmba.com/operations/project/pert/ http://web2.concordia.ca/Quality/tools/20pertchart.pdf http://it.toolbox.com/blogs/enterprise-solutions/pros-cons-of-the-pertcpm-method-22221

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• Android SDK PATH Error: doesn´t find home directory

  - by THeo Oliveira

  I use Ubuntu 12.10 and I tried to follow this guide Install android sdk and eclipse in Ubuntu 12.04 but I keep getting this error: Error: The AVD manager normally uses the user's profile directory to store AVD files. However it failed to find the default profile directory. To fix this, please set the environment variable ANDROID_SDK_HOME to a valid path such as ¨~¨. Any ideas how can I fix this?

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• links for 2010-04-27

  - by Bob Rhubart

  @oracletechnet: Oracle Technology Network Newsletters Revisited "You may find this hard to believe, but some analysts contend that email newsletters are still among the most preferred methods of "information awareness" by developers today. And in our experience, the numbers back it up: subscriptions to Oracle Technology Network newsletters grow organically by 15% every year, even after you take continual list cleanup into account. " -- Justin Kestelyn (tags: oracle otn newsletters developers architects) Sylvain Duloutre: Directory Services as a Web Service Sylvain Duloutre shares a WSDL file he created to deal with issues involved in XML binding generation. (tags: oracle sun wsdl webservices DSEE netbeans jdeveloper) Nick Wooler: Iron-Clad Cloud: Secure Cloud Computing "One solution to the security problem with cloud services can be overcome using Service Oriented Security. The Oracle approach to using Service Oriented Security allows developers to pull from a centralized, authoritative source of identity services. This allows developers to build security into every application from the inside-out. This is critical to ensuring this is done in a standardized manner and most importantly it allows developers to develop without being security experts." -- Nick Wooler (tags: oracle sun security cloud saas) Andy Mulholland: A week of visits; Cisco, HP, Oracle, SAP and VMware (in alphabetical order!) "I now am considering that we should be thinking about ‘clouds’ in virtual way, by which I mean that a succession of virtual ‘clouds’ will need to exist, each possessing specific characteristics that suit certain types of services. Really it’s no different to what we see with servers today. Adding a hypervisor to a server adds new flexibility, but creating a virtualised environment means much more. What I suspect will happen is that we will start to use vendor specific approaches to building what I will term a physical cloud solution using their technology and approach to supporting a specific objective, but with time we will find these physical clouds will interoperate as a fully virtualised cloud environment." -- Andy Mulholland (tags: entarch enterprisearchitecture cloudcomputing virtualization) @fteter: Highlights From The Bright Lights - Tuesday #c10 Oracle Ace Director Floyd Teter of JPL with one last wrap-up of Collaborate 10. (tags: oracle otn collaborate2010 las vegas) Rittman Mead India – Call for very good Oracle BI Developers/Architects "Now that we have an office in India and if you are interested in joining us, do drop us a line at [email protected], and we will be glad to have technical discussions with you. If you are also an Oracle BI, DW or EPM customer looking for help on projects in the Asia-Pacific region, again we’ll be pleased to hear from you and to let you know how we can help." -- Venkatakrishnan J (tags: otn oracle jobs india developers architects software)

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