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• What is optimal hardware configuration for heavy load LAMP application

  - by Piotr Kochanski

  I need to run Linux-Apache-PHP-MySQL application (Moodle e-learning platform) for a large number of concurrent users - I am aiming 5000 users. By concurrent I mean that 5000 people should be able to work with the application at the same time. "Work" means not only do database reads but writes as well. The application is not very typical, since it is doing a lot of inserts/updates on the database, so caching techniques are not helping to much. We are using InnoDB storage engine. In addition application is not written with performance in mind. For instance one Apache thread usually occupies about 30-50 MB of RAM. I would be greatful for information what hardware is needed to build scalable configuration that is able to handle this kind of load. We are using right now two HP DLG 380 with two 4 core processors which are able to handle much lower load (typically 300-500 concurrent users). Is it reasonable to invest in this kind of boxes and build cluster using them or is it better to go with some more high-end hardware? I am particularly curious how many and how powerful servers are needed (number of processors/cores, size of RAM) what network equipment should be used (what kind of switches, network cards) any other hardware, like particular disc storage solutions, etc, that are needed Another thing is how to put together everything, that is what is the most optimal architecture. Clustering with MySQL is rather hard (people are complaining about MySQL Cluster, even here on Stackoverflow).

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• How to set DocFlavor for printservice in Java for WIndows.

  - by om

  Hello, I have written code to run the printer programatically in Java.I have to set the value of docflavor to print the .txt file.When I set it for INPUT_STREAM.TEXT_PLAIN_UTF_8 and run my program on Linux , it prints the text file.but when i run the same code for windows.It can't print the text file.It only prints the jpeg format file.I am using HP Deskjet F735 printer for this. Following is my code . DocFlavor docflavor = DocFlavor.INPUT_STREAM.TEXT_PLAIN_UTF_8; PrintRequestAttributeSet attr_set = new HashPrintRequestAttributeSet(); attr_set.add(new Copies(2)); PrintService[] service = PrintServiceLookup.lookupPrintServices(docflavor, attr_set); if (service.length==0) { JOptionPane.showMessageDialog(null, "No Printer Selected"); } else if (service.length > 0) { System.out.println("Selected printer is " + service[0].getName()); DocPrintJob pj = service[0].createPrintJob(); { PrintService ps = pj.getPrintService(); FileInputStream fis = null; try { File file = new File("/home/ignu/Desktop/newfile"); fis = new FileInputStream(file); Doc doc = new SimpleDoc(fis, docflavor, null); pj.print(doc, attr_set);

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• Return call from ggplot object

  - by aL3xa

  I've been using ggplot2 for a while now, and I can't find a way to get formula from ggplot object. Though I can get basic info with summary(<ggplot_object>), in order to get complete formula, usually I was combing up and down through .Rhistory file. And this becomes frustrating when you experiment with new graphs, especially when code gets a bit lengthy... so searching through history file isn't quite convenient way of doing this... Is there a more efficient way of doing this? Just an illustration: p <- qplot(data = mtcars, x = factor(cyl), geom = "bar", fill = factor(cyl)) + scale_fill_manual(name = "Cylinders", value = c("firebrick3", "gold2", "chartreuse3")) + stat_bin(aes(label = ..count..), vjust = -0.2, geom = "text", position = "identity") + xlab("# of cylinders") + ylab("Frequency") + opts(title = "Barplot: # of cylinders") I can get some basic info with summary: > summary(p) data: mpg, cyl, disp, hp, drat, wt, qsec, vs, am, gear, carb [32x11] mapping: fill = factor(cyl), x = factor(cyl) scales: fill faceting: facet_grid(. ~ ., FALSE) ----------------------------------- geom_bar: stat_bin: position_stack: (width = NULL, height = NULL) mapping: label = ..count.. geom_text: vjust = -0.2 stat_bin: width = 0.9, drop = TRUE, right = TRUE position_identity: (width = NULL, height = NULL) But I want to get code I typed in to get the graph. I reckon that I'm missing something essential here... it's seems impossible that there's no way to get call from ggplot object!

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• How to convert many thousands of lines of VBScript to C#?

  - by Ross Patterson

  I have a collection of about 10,000 small VBScript programs (50-100 lines each) and a small collection of larger ones, and I'm looking for a way to convert them to C# without resorting to by-hand transliteration. The programs are automated test cases for a web application, written for HP/Mercury's QuickTest Pro, and I'm trying to turn them into test cases for Selenium. Luckily, the tests appear to be well-written, using a library of building blocks and idioms (the larger programs), so the test cases actually resemble a domain-specific language more than they do VBScript, and the QTP-ness is well-buried inside the libraries. Ideally, what I'm searching for is a tool that can do the syntactic transformation from VBScript to C# for both the dsl-ish test cases and also the more complicated building-block libraries. That would leave me with a manual cleanup of the libraries, and probably very little work on the test cases. If I could find a VBScript-to-VB.NET translator, I'd take that also, as I suspect I could compile the VB.NET and then de-compile to C# using .NET Relector or something similar. Plan B is to write a translator of my own for the test cases, since they're in a very straight-line style, but it wouldn't help with the libraries. Any suyggestions? I haven't written a compiler in at least 15 years, and while I haven't forgotten how, I'm not looking forward to it - least of all for VBScript!

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• Visual Studio project remains "stuck" when stopped

  - by Traveling Tech Guy

  Hi, Currently developing a connector DLL to HP's Quality Center. I'm using their (insert expelative) COM API to connect to the server. An Interop wrapper gets created automatically by VStudio. My solution has 2 projects: the DLL and a tester application - essentially a form with buttons that call functions in the DLL. Everything works well - I can create defects, update them and delete them. When I close the main form, the application stops nicely. But when I call a function that returns a list of all available projects (to fill a combo box), if I close the main form, VStudio still shows the solution as running and I have to stop it. I've managed to pinpoint a single function in my code that when I call, the solution remains "hung" and if I don't, it closes well. It's a call to a property in the TDC object get_VisibleProjects that returns a List (not the .Net one, but a type in the COM library) - I just iterate over it and return a proper list (that I later use to fill the combo box): public List<string> GetAvailableProjects() { List<string> projects = new List<string>(); foreach (string project in this.tdc.get_VisibleProjects(qcDomain)) { projects.Add(project); } return projects; } My assumption is that something gets retained in memory. If I run the EXE outside of VStudio it closes - but who knows what gets left behind in memory? My question is - how do I get rid of whatever calling this property returns? Shouldn't the GC handle this? Do I need to delve into pointers? Things I've tried: getting the list into a variable and setting it to null at the end of the function Adding a destructor to the class and nulling the tdc object Stepping through the tester function application all the way out, whne the form closes and the Main function ends - it closes, but VStudio still shows I'm running. Thanks for your assistance!

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• C++ Printing: Printer jams, what am I doing wrong?

  - by Kleas

  I have a problem with printing in C++. As far as I know, this code used to work on my previous printer, but ever since I got another one (an HP C7280) it started giving problems. Whenever I try to print anything, even an empty page, the page JAMS the printer. I have to manualy remove the page from the printer. I have no clue why this is happening. Am I doing something wrong, is it a driver problem, are there better ways to print in C++? I am using Windows 7 64 bit, but this problem also presented itself when I was using Windows Vista 64 bit. I use the following code: PRINTDLG pd; ZeroMemory(&pd, sizeof(pd)); pd.lStructSize = sizeof(pd); pd.hwndOwner = mainWindow; pd.hDevMode = NULL; pd.hDevNames = NULL; pd.Flags = PD_USEDEVMODECOPIESANDCOLLATE | PD_RETURNDC; pd.nCopies = 1; pd.nMinPage = 1; pd.nMaxPage = 0xFFFF; if (PrintDlg(&pd)==TRUE) { DOCINFO di; di.cbSize = sizeof(DOCINFO); di.lpszDocName = "Rumitec en Roblaco Print"; di.lpszOutput = (LPTSTR)NULL; di.fwType = 0; // Start printing StartDoc(pd.hDC, &di); StartPage(pd.hDC); initPrinter(pd.hDC); // ... // Do some drawing // ... // End printing EndPage(pd.hDC); EndDoc(pd.hDC); DeleteDC(pd.hDC); } Am I doing something wrong? Alternatively, is there a better, easier, more modern way to do it?

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• PHP: Building A Stock Index Using Yahoo Finance [on hold]

  - by Jeremy

  I have the following code which is pulling data but it is not outputting properly. <?php class YahooStock { public function getQuotes(){ $stocks = array(); $result = array(); $s = file_get_contents("http://finance.yahoo.com/d/quotes.csv?s=AMZN+CRM+CNQR+CTL+CTXS+DWRE+EMC+GOOG+HP+IBM+JIVE+LNKD+MKTO+MSFT+N+NFLX+NOW+ORCL+RAX+SAP+T+VEEV+VMW+VZ+WDAY&f=npf6&e=.csv"); $data = explode( ',', $s); $result = $data; return $result; } } $objYahooStock = new YahooStock; foreach( $objYahooStock->getQuotes() as $code => $result){ echo 'Name:' . $result[0] . '<br />'; echo 'Price:' . $result[1] . '<br />'; echo 'Float:' . $result[2] . '<br />'; } ?> The output looks like it is separating every character with a comma instead of each column: Name:" Price:A Float:m Name: Price:I Float:n Name:3 Price:3 Float:2 Name: Price: Float: Any help is appreciated!

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• Optimal (Time paradigm) solution to check variable within boundary

  - by kumar_m_kiran

  Hi All, Sorry if the question is very naive. I will have to check the below condition in my code 0 < x < y i.e code similar to if(x > 0 && x < y) The basic problem at system level is - currently, for every call (Telecom domain terminology), my existing code is hit (many times). So performance is very very critical, Now, I need to add a check for boundary checking (at many location - but different boundary comparison at each location). At very normal level of coding, the above comparison would look very naive without any issue. However, when added over my statistics module (which is dipped many times), performance will go down. So I would like to know the best possible way to handle the above scenario (kind of optimal way for limits checking technique). Like for example, if bit comparison works better than normal comparison or can both the comparison be evaluation in shorter time span? Other Info x is unsigned integer (which must be checked to be greater than 0 and less than y). y is unsigned integer. y is a non-const and varies for every comparison. Here time is the constraint compared to space. Language - C++. Now, later if I need to change the attribute of y to a float/double, would there be another way to optimize the check (i.e will the suggested optimal technique for integer become non-optimal solution when y is changed to float/double). Thanks in advance for any input. PS : OS used is SUSE 10 64 bit x64_64, AIX 5.3 64 bit, HP UX 11.1 A 64.

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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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• dhcp-snooping option 82 drops valid dhcp requests on 2610 series Procurve switches

  - by kce

  We are slowly starting to implement dhcp-snooping on our HP ProCurve 2610 series switches, all running the R.11.72 firmware. I'm seeing some strange behavior where dhcp-request or dhcp-renew packets are dropped when originating from "downstream" switches due "untrusted relay information from client". The full error: Received untrusted relay information from client <mac-address> on port <port-number> In more detail we have a 48 port HP2610 (Switch A) and a 24 port HP2610 (Switch B). Switch B is "downstream" of Switch A by virtue of a DSL connection to one of Switch A ports. The dhcp server is connected to Switch A. The relevant bits are as follows: Switch A dhcp-snooping dhcp-snooping authorized-server 192.168.0.254 dhcp-snooping vlan 1 168 interface 25 name "Server" dhcp-snooping trust exit Switch B dhcp-snooping dhcp-snooping authorized-server 192.168.0.254 dhcp-snooping vlan 1 interface Trk1 dhcp-snooping trust exit The switches are set to trust BOTH the port the authorized dhcp server is attached to and its IP address. This is all well and good for the clients attached to Switch A, but the clients attached to Switch B get denied due to the "untrusted relay information" error. This is odd for a few reasons 1) dhcp-relay is not configured on either switch, 2) the Layer-3 network here is flat, same subnet. DHCP packets should not have a modified option 82 attribute. dhcp-relay does appear to be enabled by default however: SWITCH A# show dhcp-relay DHCP Relay Agent : Enabled Option 82 : Disabled Response validation : Disabled Option 82 handle policy : append Remote ID : mac Client Requests Server Responses Valid Dropped Valid Dropped ---------- ---------- ---------- ---------- 0 0 0 0 SWITCH B# show dhcp-relay DHCP Relay Agent : Enabled Option 82 : Disabled Response validation : Disabled Option 82 handle policy : append Remote ID : mac Client Requests Server Responses Valid Dropped Valid Dropped ---------- ---------- ---------- ---------- 40156 0 0 0 And interestingly enough the dhcp-relay agent seems very busy on Switch B, but why? As far as I can tell there is no reason why dhcp requests need a relay with this topology. And furthermore I can't tell why the upstream switch is dropping legitimate dhcp requests for untrusted relay information when the relay agent in question (on Switch B) isn't modifying the option 82 attributes anyway. Adding the no dhcp-snooping option 82 on Switch A allows the dhcp traffic from Switch B to be approved by Switch A, by virtue of just turning off that feature. What are the repercussions of not validating option 82 modified dhcp traffic? If I disable option 82 on all my "upstream" switches - will they pass dhcp traffic from any downstream switch regardless of that traffic's legitimacy? This behavior is client operating system agnostic. I see it with both Windows and Linux clients. Our DHCP servers are either Windows Server 2003 or Windows Server 2008 R2 machines. I see this behavior regardless of the DHCP servers' operating system. Can anyone shed some light on what's happening here and give me some recommendations on how I should proceed with configuring the option 82 setting? I feel like i just haven't completely grokked dhcp-relaying and option 82 attributes.

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• Random servers in Citrix servers suddenly bluescreens (mostly 0x0000008e and 0x0000007e)

  - by Rasmus Rask

  I'm responsible for a Citrix Presentation Server 4.5 farm. Starting Friday 30. November, my servers started to crash randomly. So far we've experienced 80 crashes, so it's obviously becoming an increasingly big problem for us. I have 12+ years experience with IT, so I know the difference between 0 and 1, but I have a hard time cracking this. We've rolled back any recent changes I can think of for different groups of servers, but all groups still seem to crash. I don't have the skills to interpret the memory dumps to find the culprit. Has anyone encountered the same or a similar problem? - might be a generic Windows issue Other than executing "analyze -v" in WinDbg, how do I work my way through the memory dumps to see what actually triggered the BSOD? Any suggested steps in getting to the bottom of this? Any help is greatly appreciated. I can also provide links to kernel memory dumps or WinDbg output if necessary. Thanks! Problem description The majority of the STOP errors we encounter are: 0x0000008e KERNEL_MODE_EXCEPTION_NOT_HANDLED (50%) 0x0000007e SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (26%) 0x00000050 PAGE_FAULT_IN_NONPAGED_AREA (21%) We also see a few 0x0000000a IRQL_NOT_LESS_OR_EQUAL (3%). For both 0x0000008e and 0x0000007e bug checks, the exception code is 0xc0000005 (Access Violation). When opening dump files in WinDbg, most details are exactly the same, for all the 0x0000008e and 0x0000007e bug checks respectively: 0x0000008e Exception address: 0x808bc9e3 Trap frame: [varies] FAILURE_BUCKET_ID: 0x8E_nt!HvpGetCellMapped+97 Probably Caused by (IMAGE_NAME): ntkrpamp.exe 0x0000007e Exception address: 0x808369b6 Exception record address: 0xf70d3be0 Context record address: 0xf70d38dc FAILURE_BUCKET_ID: 0x7E_nt!MmPurgeSection+14 Probably Caused by: memory_corruption About 30% of the crashes happens between 17:00 and 19:00, which leads me to believe this tend to happen more often during logoffs. But then again, only ~15% occurs between 15:00 and 17:00. Summary of farm Citrix Presentation Server 4.5 R06 on Windows Server 2003 R2 SP2 All high priority patches, at least as of October installed Virtualized using VMWare ESX/vSphere 4.1 on HP Proliant BL460c G6 blade servers About 53 Presentation Servers in production, divided into three silos - only one of which, the largest, is affected 2 vCPU's (5 GHz reserved), 8 GB RAM (all reserved) for each Presentation Server Plenty of free disk space Very few printer drivers - automated deletion of non-approved drivers every night ~1.000 peak concurrent users, which is reached at around 10:30 (on weekdays) Number of sessions steadily decline between 15:00 and 19:00 to ~230

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• Touch gestures in IE not working without explorer.exe being run once

  - by Michael

  Edit: Rephrasing my question: Upon further troubleshooting, I can conclude that: Touch gestures (dragging, pinch to zoom, touch-and-hold right click) in Internet Explorer start to work when: The system has been running for ~2 minutes. This coincides with the delayed start of services. Explorer.exe is being run, then killed. I assume Explorer.exe starts some services? The services with delayed start are as follows: Security Center Software Protection Windows Defender, Search and Update Windows Font Cache Service Microsoft .NET Framework NGEN v4.0.30319_X64 and X86 I see no connection between these services and touch gestures, but just in case, I manually tried starting these services, but without luck. What else happens delayed after system boot, which also happens when explorer is started? Old question: Details: Internet Explorer 9 and Windows 7 Professional, running on a HP TouchSmart (touch screen PC). It is going to be a kiosk PC (running a custom GUI for displaying websites). Scenario 1: When running Internet Explorer as a normal program in Windows 7, touch functions work perfectly. I can scroll the website by dragging it with my finger, I can pinch zoom and I can touch-and-hold right click. I now change the default shell in Windows to Internet Explorer (ie. IE starts instead of explorer.exe). Internet Explorer of course starts up when logging in. However, touch functions are reduced to basic clicking (no dragging, no pinch zooming, no touch-and-hold right click). Then I manually start explorer.exe, and the touch functions work again! And here is the weird part: When I kill explorer.exe, the touch functions keeps working - even if I close IE and start a new instance. Scenario 2: The exact same, but instead of changing the default shell to Internet Explorer, I change it to my own program, which uses an embedded Internet Explorer ("WebBrowser"). Same thing happens. What I've tried: Autorun programs: When explorer.exe launches, it launches all the autorun programs. There are no relevant programs being run by explorer, but just in case, I have manually started all the autorun programs, so that it is identical (but without explorer.exe) to a normal login. It still does not work (until I launch explorer.exe). Specifically TabTip.exe, TabTip32.exe and wisptis.exe are all running. All services are also started. To sum it up Running explorer.exe once changes something in the touch capabilities of Internet Explorer. It doesn't matter if explorer.exe is running - as long as it has been run once. Does anyone know what causes this behavior? Or how I can circumvent it neatly?

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• WSUS appears to be functioning, however errors are reported in Application Log (DSS Authentication W

  - by Richard Slater

  I re-installed WSUS a few months ago on a new server as part of a server hardware refresh. It is functioning normally downloading, authorizing and supplying patches to workstations. System Specification: HP DL360 G5 Quad 2.5 Zeon 6GB RAM Not Virtualized WSUS 3.2.7600.3226 SQL 2005 Express Windows 2003 R2 SP2 WSS SSL Enabled Every six hours five events are logged to the Application Event Log: Source | Category | ID | Description -------------------------------------------------------------------------------------- Windows Server Update Services | Web Services | 12052 | The DSS Authentication Web Service is not working. Windows Server Update Services | Web Services | 12042 | The SimpleAuth Web Service is not working Windows Server Update Services | Web Services | 12022 | The Client Web Service is not working Windows Server Update Services | Web Services | 12032 | The Server Synchronization Web Service is not working Windows Server Update Services | Web Services | 12012 | The API Remoting Web Service is not working In addition the following .NET Stack Trace is logged in C:\Program Files\Update Services\LogFiles\SoftwareDistribution.log each stack trace is identical except for the names of the services: 2009-11-27 11:56:52.757 UTC Error WsusService.10 HmtWebServices.CheckApiRemotingWebService ApiRemoting WebService WebException:System.Net.WebException: The request failed with HTTP status 403: Forbidden. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at Microsoft.UpdateServices.Internal.ApiRemoting.Ping(Int32 pingLevel) at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.CheckApiRemotingWebService(EventLoggingType type, HealthEventLogger logger) at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.CheckApiRemotingWebService(EventLoggingType type, HealthEventLogger logger) at Microsoft.UpdateServices.Internal.HealthMonitoring.HealthMonitoringTasks.ExecuteSubtask(HealthMonitoringSubtask subtask, EventLoggingType type, HealthEventLogger logger) at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.Execute(EventLoggingType type) at Microsoft.UpdateServices.Internal.HealthMonitoring.HealthMonitoringTasks.Execute(EventLoggingType type) at Microsoft.UpdateServices.Internal.HealthMonitoring.HealthMonitoringThreadManager.Execute(Boolean waitIfNecessary, EventLoggingType loggingType) at Microsoft.UpdateServices.Internal.HealthMonitoring.RemotingChannel.PrivateLogEvents() at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg, Int32 methodPtr, Boolean fExecuteInContext) at System.Runtime.Remoting.Messaging.ServerObjectTerminatorSink.SyncProcessMessage(IMessage reqMsg) at System.Runtime.Remoting.Lifetime.LeaseSink.SyncProcessMessage(IMessage msg) at System.Runtime.Remoting.Messaging.ServerContextTerminatorSink.SyncProcessMessage(IMessage reqMsg) at System.Runtime.Remoting.Channels.CrossContextChannel.SyncProcessMessageCallback(Object[] args) at System.Runtime.Remoting.Channels.ChannelServices.DispatchMessage(IServerChannelSinkStack sinkStack, IMessage msg, IMessage& replyMsg) at System.Runtime.Remoting.Channels.SoapServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream) at System.Runtime.Remoting.Channels.BinaryServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream) at System.Runtime.Remoting.Channels.Ipc.IpcServerTransportSink.ServiceRequest(Object state) at System.Runtime.Remoting.Channels.SocketHandler.ProcessRequestNow() at System.Runtime.Remoting.Channels.SocketHandler.BeginReadMessageCallback(IAsyncResult ar) at System.Runtime.Remoting.Channels.Ipc.IpcPort.AsyncFSCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOverlapped) at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP) So far I have tried the following: Ensuring the settings were accurate as per TechNet. Checked that there was a suitable binding to 127.0.0.1 binding in IIS. Gone through and checked the settings in IIS as per TechNet. I have discovered that you can run the command wsusutil checkhealth to force the healt check to run, wsusutil can be found in C:\Program Files\Update Services\Tools. When this executese it will tell you to check the application log.

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• Setting up two screens in Xorg

  - by viraptor

  I'be got two Nvidia cards, but Xorg activates only one of them. The following config is based on the nvidia configurator output: Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" LeftOf "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Module" Load "dbe" Load "extmod" Load "type1" Load "freetype" Load "glx" EndSection Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "keyboard" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "HP LE2201w" HorizSync 24.0 - 83.0 VertRefresh 50.0 - 76.0 Option "DPMS" EndSection Section "Monitor" Identifier "Monitor1" VendorName "Unknown" ModelName "Acer AL2017" HorizSync 30.0 - 82.0 VertRefresh 56.0 - 76.0 Option "DPMS" EndSection Section "Device" Identifier "Card0" Driver "nvidia" VendorName "nVidia Corporation" BoardName "GeForce 6100 nForce 405" BusID "PCI:0:13:0" EndSection Section "Device" Identifier "Card1" Driver "nvidia" VendorName "nVidia Corporation" BoardName "GeForce 8400 GS" BusID "PCI:2:0:0" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection What I see in the log file is: (==) Log file: "/var/log/Xorg.0.log", Time: Fri Mar 19 11:08:08 2010 (==) Using config file: "/etc/X11/xorg.conf" (==) ServerLayout "Layout0" (**) |-->Screen "Screen0" (0) (**) | |-->Monitor "Monitor0" (==) No device specified for screen "Screen0". Using the first device section listed. (**) | |-->Device "Card0" (**) |-->Screen "Screen1" (1) (**) | |-->Monitor "Monitor1" (==) No device specified for screen "Screen1". Using the first device section listed. (**) | |-->Device "Card0" (**) |-->Input Device "Keyboard0" (**) |-->Input Device "Mouse0" (**) Option "Xinerama" "0" (==) Automatically adding devices (==) Automatically enabling devices even though later on both cards are detected: (--) PCI:*(0:0:13:0) 10de:03d1:1019:2601 nVidia Corporation C61 [GeForce 6100 nForce 405] rev 162, Mem @ 0xfb000000/16777216, 0xd0000000/268435456, 0xfc000000/16777216, BIOS @ 0x????????/131072 (--) PCI: (0:2:0:0) 10de:0422:0000:0000 nVidia Corporation G86 [GeForce 8400 GS] rev 161, Mem @ 0xf8000000/16777216, 0xe0000000/268435456, 0xf6000000/33554432, I/O @ 0x0000bc00/128, BIOS @ 0x????????/131072 [ --- some more logs --- ] (II) Mar 19 11:08:10 NVIDIA(0): NVIDIA GPU GeForce 6100 nForce 405 (C61) at PCI:0:13:0 (II) Mar 19 11:08:10 NVIDIA(0): (GPU-0) [ --- some more logs --- ] (II) Mar 19 11:08:12 NVIDIA(GPU-1): NVIDIA GPU GeForce 8400 GS (G86) at PCI:2:0:0 (GPU-1) Unfortunately later on only one card is initialised and one screen is active. Xrandr shows only one screen too. Any ideas on how to fix it?

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• DPM 2010 "Disk failed or disk not found"

  - by SysAdmin

  I have an HP Proliant ML110 G5 server with Windows server 2008R2 only dedicated for DPM 2010. This server has a limit in HD of 8TB which has already been met. I'm now stuck in this situation where my disk keeps failing "Disk failed or Disk not found" in the disk management. Only after I reboot the system the disk comes back up. Today I was running my monthly tape backup on a certain protection group and the disk failed again while the tape job was running (so the job wasn't completed). This is the description of the error in the alerts: "The disk Disk 1 - Hitachi HDS722020ALA330 SCSI Disk Device cannot be detected or has stopped responding. All subsequent protection activities that use this disk will fail until the disk is brought back online. (ID 3120)". My backup system is becoming useless! I don't think that is a hardware issue (please correct me if I'm wrong) since the HD works fine for a certain period of time which is becoming shorter and shorter. I basically have no more option to fix this problem. I tried to fix any error that was coming up in the event viewer with no luck (included one regarding the SQL2008 compatibility issue). The disk keeps failing! Now I'm only trying to recover/migrate the data from the disk that is having problem but my issue now is that I cannot add any drives to my server since I already got installed the maximum storage capacity 8TB. I thought about 2 simple options. Please tell me what you guys think about it; Unplug one of the 2 storage pool disks (disk0, that one without problem) from the machine and install a new one in order to migrate the data with the Migration tool for DPM. Remove the defective disk (disk1), put back the disk0 and run the synchronization/consistency check on all the groups to recreate replicas and recovery points. Run diskpart.exe and clean up the disk (loosing all data) and hoping that he will work after I sync all the protection groups. Both solutions are not elegant but I have no better options at the moment. Please I need some help. Thanks for your time Angelo

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• Why is vCenter 5.1u1 exiting hosts from maintenance mode?

  - by Shane Madden

  This vCenter server was just upgraded to 5.1 update 1. I'm going through hosts and bringing firmware up to date, then upgrading them from various versions of 5.0 to 5.1u1. vCenter 5.1u1 seems to have an interesting new behavior: it's removing hosts from maintenance mode when they reconnect after being disconnected -- but very inconsistently, I've seen it maybe 4 or 5 times on ~25-30 host reboots. I've only seen it happen on 5.0 hosts that have not yet been upgraded to 5.1. In the image, I placed the host in maint mode and rebooted it into the HP SPP DVD's automatic update mode. After its usual ~40 minute update process, the host came back online.. and 7 seconds before even logging that the host had reconnected, vCenter had sent the host a task to exit maintenance mode. In my understanding, the only time vCenter should drop a host out of maintenance mode is when vCenter put it into maintenance mode itself (such as a VUM upgrade task). Why would this vCenter be unilaterally exiting a host from user-initiated maintenance mode? Edit, additional info: I ran the firmware upgrades on 5 more hosts, all at the same time. Two of them exited maint mode after reconnecting, three did not. The common factor of those exiting maint mode seems to be how long they were offline; the two that took a few tries to boot to the virtual media are the two that got knocked out of maint mode. esx31 (image above): 45 minutes unresponsive esx19 (exited maint): 87 minutes unresponsive esx24 (stayed in maint): 32 minutes unresponsive esx29 (stayed in maint): 39 minutes unresponsive esx32 (stayed in maint): 30 minutes unresponsive esx34 (exited maint): 70 minutes unresponsive Edit: The disconnect time idea seems to have been a red herring, as it's not happening consistently. Additionally, in the vpxd.log the exit maint mode task initiation seems to always immediately follow this vim.EnvironmentBrowser.queryProvisioningPolicy SOAP call. Here's the lines, slightly trimmed for clarity: 15:27:49.535 [info 'vpxdvpxdVmomi'] [ClientAdapterBase::InvokeOnSoap] Invoke done (esx31, vim.EnvironmentBrowser.queryProvisioningPolicy) 15:27:49.560 [info 'commonvpxLro'] [VpxLRO] -- BEGIN task -- esx31 -- HostSystem.exitMaintenanceMode -- Note that on the nodes that don't get the exit task, the vim.EnvironmentBrowser.queryProvisioningPolicy event still occurs. I'm not seeing any other differences in events before or after this in the reconnect process, aside from the extra events caused by exiting maintenance mode. Given the log's mention of provisioning policies, looking for autodeploy-related maintenance mode issues turns up complaints about similar behavior (though I'm not using autodeploy at all).

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• How do I protect a low budget network from rogue DHCP servers?

  - by Kenned

  I am helping a friend manage a shared internet connection in an apartment buildling with 80 apartments - 8 stairways with 10 apartments in each. The network is laid out with the internet router at one end of the building, connected to a cheap non-managed 16 port switch in the first stairway where the first 10 apartments are also connected. One port is connected to another 16 port cheapo switch in the next stairway, where those 10 apartments are connected, and so forth. Sort of a daisy chain of switches, with 10 apartments as spokes on each "daisy". The building is a U-shape, approximately 50 x 50 meters, 20 meters high - so from the router to the farthest apartment it’s probably around 200 meters including up-and-down stairways. We have a fair bit of problems with people hooking up wifi-routers the wrong way, creating rogue DHCP servers which interrupt large groups of the users and we wish to solve this problem by making the network smarter (instead of doing a physical unplugging binary search). With my limited networking skills, I see two ways - DHCP-snooping or splitting the entire network into separate VLANS for each apartment. Separate VLANS gives each apartment their own private connection to the router, while DHCP snooping will still allow LAN gaming and file sharing. Will DHCP snooping work with this kind of network topology, or does that rely on the network being in a proper hub-and-spoke-configuration? I am not sure if there are different levels of DHCP snooping - say like expensive Cisco switches will do anything, but inexpensive ones like TP-Link, D-Link or Netgear will only do it in certain topologies? And will basic VLAN support be good enough for this topology? I guess even cheap managed switches can tag traffic from each port with it’s own VLAN tag, but when the next switch in the daisy chain receives the packet on it’s “downlink” port, wouldn’t it strip or replace the VLAN tag with it’s own trunk-tag (or whatever the name is for the backbone traffic). Money is tight, and I don’t think we can afford professional grade Cisco (I have been campaigning for this for years), so I’d love some advice on which solution has the best support on low-end network equipment and if there are some specific models that are recommended? For instance low-end HP switches or even budget brands like TP-Link, D-Link etc. If I have overlooked another way to solve this problem it is due to my lack of knowledge. :)

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• Issue with VMWare vSphere and NFS: re occurring apd state

  - by Bastian N.

  I am experiencing issues with VMWare vSphere 5.1 and NFS storage on 2 different setups, which result in an "All Path Down" state for the NFS shares. This first happened once or twice a day, but lately it occurs much more frequent, as specially when Acronis Backup jobs are running. Setup 1 (Production): 2 ESXi 5.1 hosts (Essentials Plus) + OpenFiler with NFS as storage Setup 2 (Lab): 1 ESXi 5.1 host + Ubuntu 12.04 LTS with NFS as storage Here is an example from the vmkernel.log: 2013-05-28T08:07:33.479Z cpu0:2054)StorageApdHandler: 248: APD Timer started for ident [987c2dd0-02658e1e] 2013-05-28T08:07:33.479Z cpu0:2054)StorageApdHandler: 395: Device or filesystem with identifier [987c2dd0-02658e1e] has entered the All Paths Down state. 2013-05-28T08:07:33.479Z cpu0:2054)StorageApdHandler: 846: APD Start for ident [987c2dd0-02658e1e]! 2013-05-28T08:07:37.485Z cpu0:2052)NFSLock: 610: Stop accessing fd 0x410007e4cf28 3 2013-05-28T08:07:37.485Z cpu0:2052)NFSLock: 610: Stop accessing fd 0x410007e4d0e8 3 2013-05-28T08:07:41.280Z cpu1:2049)StorageApdHandler: 277: APD Timer killed for ident [987c2dd0-02658e1e] 2013-05-28T08:07:41.280Z cpu1:2049)StorageApdHandler: 402: Device or filesystem with identifier [987c2dd0-02658e1e] has exited the All Paths Down state. 2013-05-28T08:07:41.281Z cpu1:2049)StorageApdHandler: 902: APD Exit for ident [987c2dd0-02658e1e]! 2013-05-28T08:07:52.300Z cpu1:3679)NFSLock: 570: Start accessing fd 0x410007e4d0e8 again 2013-05-28T08:07:52.300Z cpu1:3679)NFSLock: 570: Start accessing fd 0x410007e4cf28 again As long as the issue occurred once or twice a day it really wasn't a problem, but now this issue has impact on the VMs. The VMs get slow or even hang, resulting in a reset through vCenter in the production environment. I searched the web extensively and asked in forums, but till now nobody was able to help me. Based on blog posts and VMWare KB articles I tried the following NFS settings: Net.TcpipHeapSize = 32 Net.TcpipHeapMax = 128 NFS.HartbeatFrequency = 12 NFS.HartbeatMaxFailures = 10 NFS.HartbeatTimeout = 5 NFS.MaxQueueDepth = 64 Instead of NFS.MaxQueueDepth = 64 I already tried other settings like NFS.MaxQueueDepth = 32 or even NFS.MaxQueueDepth = 1. Unfortunately without any luck. It would be great if someone could help me on this issue. It is really annoying. Thanks in advance for all the help. [UPDATE] As I explained in the comment below, here is the network setup: On the production setup the NFS traffic is bound to a separate VLAN with ID 20. I am using a HP 1810 24 Port Switch. The OpenFiler system is connected to the VLAN with 4 Intel GbE NICs with dynamic LACP. The ESXis both have 4 Intel GbE NICs using 2 static LACP trunks containing 2 NICs each. One pair is connected to the regular LAN and the other one to the VLAN 20. And here is a screenshot of the vSwitch: Switch configuration: Port configuration: On the lab setup its a single Intel NIC on each side without VLAN, but with different IP subnet.

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• Linux Mint 14 severe overheating

  - by agvares

  I've tried switching to Mint (it was Mint 12) about 6 months ago, but failed to do it due to enormous overheating which made it virtually impossible to run any applications more complex than Gedit. Time had passed, and now I'm back again with Mint 14, but feeling way more determined. What I face are the following issues: 1) Great overheating (and by great I mean that just by doing nothing my CPU temp is floating around 70-75 C, which I find a lot) 2) Running multiple applications (let's say Chrome, Skype and Pidgin) results in critical overheating and immediate shutdown of the system 3) Due to the stuff listed above, my battery drains in about 10-15 minutes, pretty much turning my laptop into a crippled desktop machine I've got a HP-dv6 laptop (i7, 6gb RAM, dual graphics) Here's the output of lspci: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Whistler XT [AMD Radeon HD 6700M Series] 07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) 0d:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) 13:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01) 19:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04) what i've tried to do already: 1) I've edited my grub file to add some "splash" arguments there 2) Installed jupiter and powertop 3) Tried to upgrade to newer kernels (up to 3.8), btw running anything newer than 3.5 results in both resolution and wi-fi detection fail 4) Read lots of forum threads devoted to the topic So, my question is simple: What else might I do to become finally able to use Mint as my default OS without the risk of being burned alive by the CPU heat?

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• !! 0xc01a00d !! aka Vista won't boot

  - by Chris

  Answer: Parts of the hard drive are corrupted. All of my user's code was checked in, so I'm just going to format the box. One of my users has an HP DV5-1235dx laptop running Windows Vista Professional x64. Last night, our WSUS server pushed out a few updates including "Security Update for Windows Vista for x64-based Systems (KB960859)". When we try to boot the laptop today, a black screen with white text comes up displaying: xxx/169894 (something) Where xxx increments rapidly and something is some dll or registry key. Eventually that stops and the screen displays !! 0xc01a00d !! 35566/169894 (\Registry\Machine\COMPONENTS\DerivedDat...) No other computers that received this update are displaying the same error. So far I've tried running CHKDSK off of HBCD. It repaired a thing or two, but the computer still doesn't boot. I tried repairing the Windows install from the Vista CD, but I get a black screen with white text displaying something along the lines of: 0 No Emulation System Type 00 1 No Emulation System Type 00 Select one of the above Booting in Last Known Good Configuration doesn't work. Booting in Safe Mode freezes at Loading Windows Files [snip] Loaded: \windows\system32\drivers\crcdisk.sys Please wait... My next step is trying to boot Safe Mode with Command Prompt and try to run rstrui.exe. While I do that, does anybody have any guidance? Edit: Booting into Safe Mode with Command Prompt will not work. See Booting in Safe Mode above. Edit 2: I managed to boot from the Vista DVD. I ran the system repair, and now I get a black screen with white text saying: !! 0xc0000034 !! 290/169894 (_0000000000000000.cdf-ms) Edit 3: I ran the system repair again, and it attempted to repair my hard drive. It failed. Problem Signature: Problem Event Name: Startup Repair V2 Problem Signature 01: External Media Problem Signature 02: 6.0.6001.18000.6.0.6001.18000 Problem Signature 03: 4 Problem Signature 04: 196611 Problem Signature 05: CorruptVolume Problem Signature 06: NoBootFailure Problem Signature 07: 0 Problem Signature 08: 0 Problem Signature 09: unknown Problem Signature 10: 1168 OS Version: 6.0.6002.2.2.0.256.1 Locale ID: 1033 Answer: Parts of the hard drive are corrupted. All of my user's code was checked in, so I'm just going to format the box.

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• XP OEM licensing when reinstalling Windows XP

  - by mindas

  My wife has managed to buy a Dell laptop she was using at her ex-employer that just went bust. The problem with it is the OS (Windows XP) which takes ages to boot and is generally disproportionally slow to the hardware of the machine. So my aim is to sacrifice a day and reinstall it. The problem I am slightly worried about is the licensing/registration/activation hell. Apart from the sticker (with WinXP license key), the laptop has no other paperwork proving this license is legitimate. I believe this was originally an OEM license. Unfortunately, I don't have the the installation CD. This computer also has MS Office installed (which I would like to retain) but it none of MS Office apps would launch due to some obscure error complaining about lack of free disk space (which computer has plenty of). I have absolutely no clue what kind of license this MS Office was. And because the company has gone into the administration, there is no way of getting this information nor installable media. I believe that by buying the hardware I have also acquired the software which I can use as I see fit. Correct me if I'm wrong. Above said, my question would be: What is the easiest way of reinstalling the XP? By easiest I mean avoiding spending my time to prove Microsoft support I've got the right to use the software (insert your computer says noooo joke here) but still being able to get to fresh virgin activated legal state of the XP. I used to work as a sysadmin many years ago so I am not afraid of any technical difficulties. The same question applies to MS Office. I imagine the process would consist of backing up all the data, pulling some bits from the registry and using that on the fresh install. As for reinstall I'd expect to use some sort of OEM Windows repair CD from Dell, right? Are those freely available? My other box (HP) has such a thing and it can't be used on any other brand. I'm sure somebody had to go through this licensing hell and could share his/her tips. Thanks in advance.

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• Router reconfigures PC's and they can no longer access the internet via hardwired connection to DSL Modem

  - by zchads

  Router reconfigures PC's and they can no longer access the internet via hardwired connection to DSL Modem. Hardware Information: Buffalo Wireless Router/access point, Model: WZR-HP-G300NH-AP DSL Modem: Generic (actually not sure of manufacture). Service Provider: TOT (Thailand) Laptop-1: Windows XP and Belkin PCMIA Network Card Laptop-2: Windows XP unknown network card & Wifi Laptop-3: Windows 7 unknown network card & Wifi Outline of Problem/actions taken: After a recent power failure the router and laptop-1 connected to router were no longer able to access the internet. Actions taken to try and recover internet access: Using Laptop-1 tried to configure Router with PPPoe settings using software from Router Manufacture. During the installation process a Timeout error was experienced, unable to connect to WAN. Used Internet Explorer to communicate directly with Router using IP address. Changed settings to use PPPoe settings given by ISP. Router was not able to communicate with Internet. Repeated steps 1-4 again with no success. Reset Router and DSL modem. Repeated steps 1-4 again still no success. Tried connecting Laptop-1 directly to DSL to gain access to internet to research problem. No Network connection with DSL could be established…connection would be established for a second and then be lost and didn’t appear long enough to actually connect to DSL. Replugged LAN back into Router and connection was regained with laptop-1. Replugged Laptop-1 directly into DSL and again unable to establish network connection. Uninstalled network card and all of its drivers on Laptop-1. Reinstalled network card and drivers and tried connecting directly to DSL. Still unable to make network connection. Plugged DSL into Laptop-3 and Internet connection was established. Being Laptop-3 does not have a CD-Rom, Laptop-2 was tried to connect to the router. With Laptop-2 steps 1-7 ended up being repeated without success. Tried plugging Laptop-2 directly into DSL and again no network connection could be established. Using Laptop-3 with a direct connection to DSL downloaded latest Router FW. Installed router FW using Laptop-1. Tired the installation process again without success. Being desperate reinstalled OS on Laptop-1 still not success. Tried using “ipconfig” with router to see what was going on without success. With laptop-1 connected to DSL went through the “ipconfig /…” inputs to see if anything made a difference. Being the network card was not able to make a connection this provide very little information “media disconnected”. So now I have a router and two laptops which are unable to connect to the internet and sure could use some advice/help.

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• XP OEM licensing when reinstalling Windows XP

  - by mindas

  My wife has managed to buy a Dell laptop she was using at her ex-employer that just went bust. The problem with it is the OS (Windows XP) which takes ages to boot and is generally disproportionally slow to the hardware of the machine. So my aim is to sacrifice a day and reinstall it. The problem I am slightly worried about is the licensing/registration/activation hell. Apart from the sticker (with WinXP license key), the laptop has no other paperwork proving this license is legitimate. I believe this was originally an OEM license. Unfortunately, I don't have the the installation CD. This computer also has MS Office installed (which I would like to retain) but it none of MS Office apps would launch due to some obscure error complaining about lack of free disk space (which computer has plenty of). I have absolutely no clue what kind of license this MS Office was. And because the company has gone into the administration, there is no way of getting this information nor installable media. I believe that by buying the hardware I have also acquired the software which I can use as I see fit. Correct me if I'm wrong. Above said, my question would be: What is the easiest way of reinstalling the XP? By easiest I mean avoiding spending my time to prove Microsoft support I've got the right to use the software (insert your computer says noooo joke here) but still being able to get to fresh virgin activated legal state of the XP. I used to work as a sysadmin many years ago so I am not afraid of any technical difficulties. The same question applies to MS Office. I imagine the process would consist of backing up all the data, pulling some bits from the registry and using that on the fresh install. As for reinstall I'd expect to use some sort of OEM Windows repair CD from Dell, right? Are those freely available? My other box (HP) has such a thing and it can't be used on any other brand. I'm sure somebody had to go through this licensing hell and could share his/her tips. Thanks in advance.

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• Intermittent Disconnection of Client Computers from Domain Server

  - by dilip nagle

  The Background: I have Windows 2008 server Enterprise Version with 25 user cal licences. It has a domain and all users and a network shared HP printer in it. The Server has two network cards and both these cards as well as all client machines are on IP addressing scheme of 192.168.1.* with subnetmask 255.255.255.0. Of the two network cards viz. 192.168.1.231 and 192.168.1.233, only 192.168.1.231 is registered with DNS. In 192.168.1.233(i.e. 2nd network card) has default getway as 192.168.1.231 and dns address as 192.168.1.231. The Server has three hard disks with capacities as 500gb, 500gb and 1TB and are partitioned as (C,D,E), (F,G) and (K) with partition K having all user data into various Shared Folders. Each of these folders(On Partition K), are mapped onto each user's computer as per the right of access given to them. The Problem: The Server was installed about 6 months ago and till date not even once, the Server has Hung or has given any problem. All the Clients computers are able to run the web based software from their computers via ip address, e.g. http://192.168.1.231/webERP/default.aspx. However, occassionally, when any client computer tries to browse network mappings, it hangs. Again, there is no fixed pattern. This may happen after running smoothly for say 3 days. On each Client's machine, the network settings are as follows: IP Address: 192.168.1.* where * is 1,2,3 .... Sunnetmask: 255.255.255.0 defauly getway: 192.168.1.231 Which is a server card and DNS address. preferred DNS Server: 192.168.1.231 In Advanced Tab under Wins: LMHostLookup is Unticked and default is radio buttoned. Ideally, I would have loved to have Disabled NETBIOS over TCP/IP but some network printers do not get accessed if this option is enabled(ie. Radio Buttoned). Bacause Disabling Netbios will drastically reduce traffic of NETBIOS broadcasting to all the computers on the net to do naming resolution. On Server, I have WINs Running which I have Scavanged Records, verified Database Integrity etc, removed Tombstoned Records etc. The Critical Errors shown only once a day when the server is statred are 4224(WINS) and 12923 - Server Licencing failed to Update DNS Record. I fail to understand as why do client machines HANG when they try to browse mapped network shared folders on K Drive. Kindly Advice

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• Looking for a new backup solution to replace dying tape drive

  - by E3 Group

  We're running Windows Server 2003 SBS and another machine with Server 2003 Standard on it. The SBS server is about 7 years old running pretty much 24/7 - a HP server of some description. We have an Ultrium 448 cycling LTO2 400GB tapes daily and incrementally backing up approximately 100gb worth of data (20gb C:\ and system state, 40gb exchange, 40gb database for some crap marketing software) on BackupExec 10D. As of 5 months ago, the backups have been consistently failing with IO errors, bad reads and some write errors. When I say consistent, I mean every time and we haven't had a proper backup for the entire 5 months - So if the server explodes tomorrow, 7 years worth of data will just cease to exist. I've only just recently rejoined the company and am looking at rectifying the more concerning problems, so the first thing I did was try a backup to an USB2.0 external drive. It was excruciatingly slow. In fact it was so slow it took 40 hours and it still wasn't finished. I ended up cancelling it and reconfiguring the selections again to reduce file size. This, however, isn't a permanent solution. I concluded that the IO error was either from a faulty tape drive (which has a tape stuck in there right now and not coming out) or from a dying SCSI controller. Neither of them are good news and both are extremely expensive to fix. I'm operating on an extremely low budget so have been looking at outsourcing the backups. A company in Sydney (where I'm located) offer incremental online backups via a NAS. It costs almost double a new tape drive but offers monthly repayments which will let us get through times when cash flow is minimal. It seems like a sweet deal but it is still a little bit pricey. So I'm looking for a cheaper, yet reliable solution. Maybe some in-house NAS or something offsite? The idea is to avoid using tapes. Are there any recommendations for rectifying my current situation? Or are tapes the only way to go? I'm concerned that the server will die one day in the near future and I must be able to restore it to another server with different hardware.

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