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  • Is there a better way to keep track of session variable creation/access throughout different pages?

    - by Brandon
    Here's what I am working on. At my website I have multiple processes with each one containing multiple steps. Now in one of the processes, there is an error checking routine executed before proceeding to the next step of that process. A session var is set indicating the error status and it will either redirect back to the referrer or display the next page's contents. Now this kind of functionality, I believe, is common throughout web development. The issue that is occurring is that session vars are left around and are not being cleaned up properly. At times this introduces undesired behavior. My website is growing and I find that I am requiring more and more session vars to keep track of different system and error states. So I was thinking about creating a kind of "session variable keeper" to keep track of session var usage. The idea is fairly simple. It will have the notion of a context (e.g. registration process) and allow access to a predefined set of session vars within that context. In addition, the var and context will be paired with an action to proceed to some form of event handling. So if you haven't noticed I'm new to web development. Any thoughts or comments on the idea that I am proposing would be greatly appreciated. The back-end is written in PHP/MySQL.

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  • Worth website that a web developer must surf daily?

    - by I Like PHP
    Hello All, this may be not a right place to ask this question, but i can get best answer only from here, so i m posting here. i m a web developer and working with technology PHP,MySQL, JavaScript,jQuery,AJAX, CSS, HTML, JSON i daily surf few websites regarding web development , i know there are a lot of website with very good knowledge but we are not aware of that so i think we have to share with each other.i m mentioning some useful links that we must surf daily for gaining knowledge and do better/fast development. please you also suggest some good links which you surf regularly and best in their field. i surf belows links regularly - [Stack Overflow][1] // No doubt, it is best - [Delicious][2]// best social bookmarking website - [Smashing Magazine][3] // Best site to improve knowledege for a web developer - [Net tuts][4] // Best tutorail wesbsite with full explanation - [Official PHP site ][5] // i think nothing to mention about it( just superb) - [Javascript Debugger][6] // U can filter your javascript/jquery code here - [jQuery Official site][7] // best to learn jQuery i m waiting for you great response. i also need any good and trusted website on mysql, i think mysql officail website is very confusing, i had to search a lot to find a single thing, if u have any good regarding mysql then share please. Thanks alwayz.

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  • how to seamlessly integrate subversion and git?

    - by mattv
    I'm looking for tips on how to seamlessly integrate subversion and git, for deploying web sites by a small team of web developers. We each have our own development versions of our sites on our local machines. We also have dev, staging, and live servers. As our team has grown, we haven't updated our revision control and deployment strategies accordingly. We had all been checking into the trunk of a shared Subversion repository. Both the dev & staging servers ran from a checkout of the trunk, so updating them involved running "svn update" while the live server ran as an export from trunk which required an "svn export" to get the latest code. In either case, we would often update just certain files by updating or exporting just those files or directories. That worked okay when there was just one or two developers. However, a big downside was that we couldn't point to an individual tag that represented what was currently on live at any given time. In keeping with corporate policy, we'd like to continue to use Subversion to store what we're now calling our "production branch," which will be what goes onto staging and live. However, we would like to use Git on our local and development sites. We especially like the idea of easier merges and being able to "cherry pick" updates that need to go live. We had initially planned on using git-svn, but it doesn't seem to work well in a shared environment such as our dev or staging servers. Anyone else doing something like this? What's the best way to make it work? Or are we making it more difficult than it should be?

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  • Is it a wise decision to go from dev to third line/Tier 3 dev support?

    - by dotnetdev
    Hi, I am an experienced, mid-level developer. However, I recently spotted a job for a company which is small but has a lot of emphasis on training(beyond the basic technical training, but also mentoring, leadership training, etc). The role is 3rd line so still very technical. It's in app support so it's post implementation development rather than pure out-and-out development like I do now (or don't, as the senior devs do all of the interesting work). However, and this is the question - is this sort of career move common? Also, wouldn't a tech support role be a big shock to the system because I've never dealt with customers? I therefore think it's a bad move? Working in dev, I am used to the lack of customer contact and it is all filtered through by my manager. But in tech support, contacting customers/rude customers could be scary. I don't mind fixing other people's mistakes (better than me making mistakes!) and doing post-implementation dev for production systems (will give me a lot of discipline), and I do get bored sitting in the same place looking/talking to the same people in suits (I work in a corporate environment). The company puts A LOT of emphasis on training and prospects, which I don't get in the current (big) company I work at. Any advice on how to handle tech support is appreciated! Thanks

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  • Overview of mobile browsers and their features?

    - by Janusz
    I'm looking for a comparison of the features of mobile browsers. Most interesting are the default preinstalled browsers. I would love a matrix that shows what device line can do what with their preinstalled browser. There is a list with rendering engines on wikipedia but there should be differences appart from the rendering right?

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  • Solaris 11.1: Changes to included FOSS packages

    - by alanc
    Besides the documentation changes I mentioned last time, another place you can see Solaris 11.1 changes before upgrading is in the online package repository, now that the 11.1 packages have been published to http://pkg.oracle.com/solaris/release/, as the “0.175.1.0.0.24.2” branch. (Oracle Solaris Package Versioning explains what each field in that version string means.) When you’re ready to upgrade to the packages from either this repo, or the support repository, you’ll want to first read How to Update to Oracle Solaris 11.1 Using the Image Packaging System by Pete Dennis, as there are a couple issues you will need to be aware of to do that upgrade, several of which are due to changes in the Free and Open Source Software (FOSS) packages included with Solaris, as I’ll explain in a bit. Solaris 11 can update more readily than Solaris 10 In the Solaris 10 and older update models, the way the updates were built constrained what changes we could make in those releases. To change an existing SVR4 package in those releases, we created a Solaris Patch, which applied to a given version of the SVR4 package and replaced, added or deleted files in it. These patches were released via the support websites (originally SunSolve, now My Oracle Support) for applying to existing Solaris 10 installations, and were also merged into the install images for the next Solaris 10 update release. (This Solaris Patches blog post from Gerry Haskins dives deeper into that subject.) Some of the restrictions of this model were that package refactoring, changes to package dependencies, and even just changing the package version number, were difficult to do in this hybrid patch/OS update model. For instance, when Solaris 10 first shipped, it had the Xorg server from X11R6.8. Over the first couple years of update releases we were able to keep it up to date by replacing, adding, & removing files as necessary, taking it all the way up to Xorg server release 1.3 (new version numbering begun after the X11R7 split of the X11 tree into separate modules gave each module its own version). But if you run pkginfo on the SUNWxorg-server package, you’ll see it still displayed a version number of 6.8, confusing users as to which version was actually included. We stopped upgrading the Xorg server releases in Solaris 10 after 1.3, as later versions added new dependencies, such as HAL, D-Bus, and libpciaccess, which were very difficult to manage in this patching model. (We later got libpciaccess to work, but HAL & D-Bus would have been much harder due to the greater dependency tree underneath those.) Similarly, every time the GNOME team looked into upgrading Solaris 10 past GNOME 2.6, they found these constraints made it so difficult it wasn’t worthwhile, and eventually GNOME’s dependencies had changed enough it was completely infeasible. Fortunately, this worked out for both the X11 & GNOME teams, with our management making the business decision to concentrate on the “Nevada” branch for desktop users - first as Solaris Express Desktop Edition, and later as OpenSolaris, so we didn’t have to fight to try to make the package updates fit into these tight constraints. Meanwhile, the team designing the new packaging system for Solaris 11 was seeing us struggle with these problems, and making this much easier to manage for both the development teams and our users was one of their big goals for the IPS design they were working on. Now that we’ve reached the first update release to Solaris 11, we can start to see the fruits of their labors, with more FOSS updates in 11.1 than we had in many Solaris 10 update releases, keeping software more up to date with the upstream communities. Of course, just because we can more easily update now, doesn’t always mean we should or will do so, it just removes the package system limitations from forcing the decision for us. So while we’ve upgraded the X Window System in the 11.1 release from X11R7.6 to 7.7, the Solaris GNOME team decided it was not the right time to try to make the jump from GNOME 2 to GNOME 3, though they did update some individual components of the desktop, especially those with security fixes like Firefox. In other parts of the system, decisions as to what to update were prioritized based on how they affected other projects, or what customer requests we’d gotten for them. So with all that background in place, what packages did we actually update or add between Solaris 11.0 and 11.1? Core OS Functionality One of the FOSS changes with the biggest impact in this release is the upgrade from Grub Legacy (0.97) to Grub 2 (1.99) for the x64 platform boot loader. This is the cause of one of the upgrade quirks, since to go from Solaris 11.0 to 11.1 on x64 systems, you first need to update the Boot Environment tools (such as beadm) to a new version that can handle boot environments that use the Grub2 boot loader. System administrators can find the details they need to know about the new Grub in the Administering the GRand Unified Bootloader chapter of the Booting and Shutting Down Oracle Solaris 11.1 Systems guide. This change was necessary to be able to support new hardware coming into the x64 marketplace, including systems using UEFI firmware or booting off disk drives larger than 2 terabytes. For both platforms, Solaris 11.1 adds rsyslog as an optional alternative to the traditional syslogd, and OpenSCAP for checking security configuration settings are compliant with site policies. Note that the support repo actually has newer versions of BIND & fetchmail than the 11.1 release, as some late breaking critical fixes came through from the community upstream releases after the Solaris 11.1 release was frozen, and made their way to the support repository. These are responsible for the other big upgrade quirk in this release, in which to upgrade a system which already installed those versions from the support repo, you need to either wait for those packages to make their way to the 11.1 branch of the support repo, or follow the steps in the aforementioned upgrade walkthrough to let the package system know it's okay to temporarily downgrade those. Developer Stack While Solaris 11.0 included Python 2.7, many of the bundled python modules weren’t packaged for it yet, limiting its usability. For 11.1, many more of the python modules include 2.7 versions (enough that I filtered them out of the below table, but you can always search on the package repository server for them. For other language runtimes and development tools, 11.1 expands the use of IPS mediated links to choose which version of a package is the default when the packages are designed to allow multiple versions to install side by side. For instance, in Solaris 11.0, GNU automake 1.9 and 1.10 were provided, and developers had to run them as either automake-1.9 or automake-1.10. In Solaris 11.1, when automake 1.11 was added, also added was a /usr/bin/automake mediated link, which points to the automake-1.11 program by default, but can be changed to another version by running the pkg set-mediator command. Mediated links were also used for the Java runtime & development kits in 11.1, changing the default versions to the Java 7 releases (the 1.7.0.x package versions), while allowing admins to switch links such as /usr/bin/javac back to Java 6 if they need to for their site, to deal with Java 7 compatibility or other issues, without having to update each usage to use the full versioned /usr/jdk/jdk1.6.0_35/bin/javac paths for every invocation. Desktop Stack As I mentioned before, we upgraded from X11R7.6 to X11R7.7, since a pleasant coincidence made the X.Org release dates line up nicely with our feature & code freeze dates for this release. (Or perhaps it wasn’t so coincidental, after all, one of the benefits of being the person making the release is being able to decide what schedule is most convenient for you, and this one worked well for me.) For the table below, I’ve skipped listing the packages in which we use the X11 “katamari” version for the Solaris package version (mainly packages combining elements of multiple upstream modules with independent version numbers), since they just all changed from 7.6 to 7.7. In the graphics drivers, we worked with Intel to update the Intel Integrated Graphics Processor support to support 3D graphics and kernel mode setting on the Ivy Bridge chipsets, and updated Nvidia’s non-FOSS graphics driver from 280.13 to 295.20. Higher up in the desktop stack, PulseAudio was added for audio support, and liblouis for Braille support, and the GNOME applications were built to use them. The Mozilla applications, Firefox & Thunderbird moved to the current Extended Support Release (ESR) versions, 10.x for each, to bring up-to-date security fixes without having to be on Mozilla’s agressive 6 week feature cycle release train. Detailed list of changes This table shows most of the changes to the FOSS packages between Solaris 11.0 and 11.1. As noted above, some were excluded for clarity, or to reduce noise and duplication. All the FOSS packages which didn't change the version number in their packaging info are not included, even if they had updates to fix bugs, security holes, or add support for new hardware or new features of Solaris. Package11.011.1 archiver/unrar 3.8.5 4.1.4 audio/sox 14.3.0 14.3.2 backup/rdiff-backup 1.2.1 1.3.3 communication/im/pidgin 2.10.0 2.10.5 compress/gzip 1.3.5 1.4 compress/xz not included 5.0.1 database/sqlite-3 3.7.6.3 3.7.11 desktop/remote-desktop/tigervnc 1.0.90 1.1.0 desktop/window-manager/xcompmgr 1.1.5 1.1.6 desktop/xscreensaver 5.12 5.15 developer/build/autoconf 2.63 2.68 developer/build/autoconf/xorg-macros 1.15.0 1.17 developer/build/automake-111 not included 1.11.2 developer/build/cmake 2.6.2 2.8.6 developer/build/gnu-make 3.81 3.82 developer/build/imake 1.0.4 1.0.5 developer/build/libtool 1.5.22 2.4.2 developer/build/makedepend 1.0.3 1.0.4 developer/documentation-tool/doxygen 1.5.7.1 1.7.6.1 developer/gnu-binutils 2.19 2.21.1 developer/java/jdepend not included 2.9 developer/java/jdk-6 1.6.0.26 1.6.0.35 developer/java/jdk-7 1.7.0.0 1.7.0.7 developer/java/jpackage-utils not included 1.7.5 developer/java/junit 4.5 4.10 developer/lexer/jflex not included 1.4.1 developer/parser/byaccj not included 1.14 developer/parser/java_cup not included 0.10 developer/quilt 0.47 0.60 developer/versioning/git 1.7.3.2 1.7.9.2 developer/versioning/mercurial 1.8.4 2.2.1 developer/versioning/subversion 1.6.16 1.7.5 diagnostic/constype 1.0.3 1.0.4 diagnostic/nmap 5.21 5.51 diagnostic/scanpci 0.12.1 0.13.1 diagnostic/wireshark 1.4.8 1.8.2 diagnostic/xload 1.1.0 1.1.1 editor/gnu-emacs 23.1 23.4 editor/vim 7.3.254 7.3.600 file/lndir 1.0.2 1.0.3 image/editor/bitmap 1.0.5 1.0.6 image/gnuplot 4.4.0 4.6.0 image/library/libexif 0.6.19 0.6.21 image/library/libpng 1.4.8 1.4.11 image/library/librsvg 2.26.3 2.34.1 image/xcursorgen 1.0.4 1.0.5 library/audio/pulseaudio not included 1.1 library/cacao 2.3.0.0 2.3.1.0 library/expat 2.0.1 2.1.0 library/gc 7.1 7.2 library/graphics/pixman 0.22.0 0.24.4 library/guile 1.8.4 1.8.6 library/java/javadb 10.5.3.0 10.6.2.1 library/java/subversion 1.6.16 1.7.5 library/json-c not included 0.9 library/libedit not included 3.0 library/libee not included 0.3.2 library/libestr not included 0.1.2 library/libevent 1.3.5 1.4.14.2 library/liblouis not included 2.1.1 library/liblouisxml not included 2.1.0 library/libtecla 1.6.0 1.6.1 library/libtool/libltdl 1.5.22 2.4.2 library/nspr 4.8.8 4.8.9 library/openldap 2.4.25 2.4.30 library/pcre 7.8 8.21 library/perl-5/subversion 1.6.16 1.7.5 library/python-2/jsonrpclib not included 0.1.3 library/python-2/lxml 2.1.2 2.3.3 library/python-2/nose not included 1.1.2 library/python-2/pyopenssl not included 0.11 library/python-2/subversion 1.6.16 1.7.5 library/python-2/tkinter-26 2.6.4 2.6.8 library/python-2/tkinter-27 2.7.1 2.7.3 library/security/nss 4.12.10 4.13.1 library/security/openssl 1.0.0.5 (1.0.0e) 1.0.0.10 (1.0.0j) mail/thunderbird 6.0 10.0.6 network/dns/bind 9.6.3.4.3 9.6.3.7.2 package/pkgbuild not included 1.3.104 print/filter/enscript not included 1.6.4 print/filter/gutenprint 5.2.4 5.2.7 print/lp/filter/foomatic-rip 3.0.2 4.0.15 runtime/java/jre-6 1.6.0.26 1.6.0.35 runtime/java/jre-7 1.7.0.0 1.7.0.7 runtime/perl-512 5.12.3 5.12.4 runtime/python-26 2.6.4 2.6.8 runtime/python-27 2.7.1 2.7.3 runtime/ruby-18 1.8.7.334 1.8.7.357 runtime/tcl-8/tcl-sqlite-3 3.7.6.3 3.7.11 security/compliance/openscap not included 0.8.1 security/nss-utilities 4.12.10 4.13.1 security/sudo 1.8.1.2 1.8.4.5 service/network/dhcp/isc-dhcp 4.1 4.1.0.6 service/network/dns/bind 9.6.3.4.3 9.6.3.7.2 service/network/ftp (ProFTPD) 1.3.3.0.5 1.3.3.0.7 service/network/samba 3.5.10 3.6.6 shell/conflict 0.2004.9.1 0.2010.6.27 shell/pipe-viewer 1.1.4 1.2.0 shell/zsh 4.3.12 4.3.17 system/boot/grub 0.97 1.99 system/font/truetype/liberation 1.4 1.7.2 system/library/freetype-2 2.4.6 2.4.9 system/library/libnet 1.1.2.1 1.1.5 system/management/cim/pegasus 2.9.1 2.11.0 system/management/ipmitool 1.8.10 1.8.11 system/management/wbem/wbemcli 1.3.7 1.3.9.1 system/network/routing/quagga 0.99.8 0.99.19 system/rsyslog not included 6.2.0 terminal/luit 1.1.0 1.1.1 text/convmv 1.14 1.15 text/gawk 3.1.5 3.1.8 text/gnu-grep 2.5.4 2.10 web/browser/firefox 6.0.2 10.0.6 web/browser/links 1.0 1.0.3 web/java-servlet/tomcat 6.0.33 6.0.35 web/php-53 not included 5.3.14 web/php-53/extension/php-apc not included 3.1.9 web/php-53/extension/php-idn not included 0.2.0 web/php-53/extension/php-memcache not included 3.0.6 web/php-53/extension/php-mysql not included 5.3.14 web/php-53/extension/php-pear not included 5.3.14 web/php-53/extension/php-suhosin not included 0.9.33 web/php-53/extension/php-tcpwrap not included 1.1.3 web/php-53/extension/php-xdebug not included 2.2.0 web/php-common not included 11.1 web/proxy/squid 3.1.8 3.1.18 web/server/apache-22 2.2.20 2.2.22 web/server/apache-22/module/apache-sed 2.2.20 2.2.22 web/server/apache-22/module/apache-wsgi not included 3.3 x11/diagnostic/xev 1.1.0 1.2.0 x11/diagnostic/xscope 1.3 1.3.1 x11/documentation/xorg-docs 1.6 1.7 x11/keyboard/xkbcomp 1.2.3 1.2.4 x11/library/libdmx 1.1.1 1.1.2 x11/library/libdrm 2.4.25 2.4.32 x11/library/libfontenc 1.1.0 1.1.1 x11/library/libfs 1.0.3 1.0.4 x11/library/libice 1.0.7 1.0.8 x11/library/libsm 1.2.0 1.2.1 x11/library/libx11 1.4.4 1.5.0 x11/library/libxau 1.0.6 1.0.7 x11/library/libxcb 1.7 1.8.1 x11/library/libxcursor 1.1.12 1.1.13 x11/library/libxdmcp 1.1.0 1.1.1 x11/library/libxext 1.3.0 1.3.1 x11/library/libxfixes 4.0.5 5.0 x11/library/libxfont 1.4.4 1.4.5 x11/library/libxft 2.2.0 2.3.1 x11/library/libxi 1.4.3 1.6.1 x11/library/libxinerama 1.1.1 1.1.2 x11/library/libxkbfile 1.0.7 1.0.8 x11/library/libxmu 1.1.0 1.1.1 x11/library/libxmuu 1.1.0 1.1.1 x11/library/libxpm 3.5.9 3.5.10 x11/library/libxrender 0.9.6 0.9.7 x11/library/libxres 1.0.5 1.0.6 x11/library/libxscrnsaver 1.2.1 1.2.2 x11/library/libxtst 1.2.0 1.2.1 x11/library/libxv 1.0.6 1.0.7 x11/library/libxvmc 1.0.6 1.0.7 x11/library/libxxf86vm 1.1.1 1.1.2 x11/library/mesa 7.10.2 7.11.2 x11/library/toolkit/libxaw7 1.0.9 1.0.11 x11/library/toolkit/libxt 1.0.9 1.1.3 x11/library/xtrans 1.2.6 1.2.7 x11/oclock 1.0.2 1.0.3 x11/server/xdmx 1.10.3 1.12.2 x11/server/xephyr 1.10.3 1.12.2 x11/server/xorg 1.10.3 1.12.2 x11/server/xorg/driver/xorg-input-keyboard 1.6.0 1.6.1 x11/server/xorg/driver/xorg-input-mouse 1.7.1 1.7.2 x11/server/xorg/driver/xorg-input-synaptics 1.4.1 1.6.2 x11/server/xorg/driver/xorg-input-vmmouse 12.7.0 12.8.0 x11/server/xorg/driver/xorg-video-ast 0.91.10 0.93.10 x11/server/xorg/driver/xorg-video-ati 6.14.1 6.14.4 x11/server/xorg/driver/xorg-video-cirrus 1.3.2 1.4.0 x11/server/xorg/driver/xorg-video-dummy 0.3.4 0.3.5 x11/server/xorg/driver/xorg-video-intel 2.10.0 2.18.0 x11/server/xorg/driver/xorg-video-mach64 6.9.0 6.9.1 x11/server/xorg/driver/xorg-video-mga 1.4.13 1.5.0 x11/server/xorg/driver/xorg-video-openchrome 0.2.904 0.2.905 x11/server/xorg/driver/xorg-video-r128 6.8.1 6.8.2 x11/server/xorg/driver/xorg-video-trident 1.3.4 1.3.5 x11/server/xorg/driver/xorg-video-vesa 2.3.0 2.3.1 x11/server/xorg/driver/xorg-video-vmware 11.0.3 12.0.2 x11/server/xserver-common 1.10.3 1.12.2 x11/server/xvfb 1.10.3 1.12.2 x11/server/xvnc 1.0.90 1.1.0 x11/session/sessreg 1.0.6 1.0.7 x11/session/xauth 1.0.6 1.0.7 x11/session/xinit 1.3.1 1.3.2 x11/transset 0.9.1 1.0.0 x11/trusted/trusted-xorg 1.10.3 1.12.2 x11/x11-window-dump 1.0.4 1.0.5 x11/xclipboard 1.1.1 1.1.2 x11/xclock 1.0.5 1.0.6 x11/xfd 1.1.0 1.1.1 x11/xfontsel 1.0.3 1.0.4 x11/xfs 1.1.1 1.1.2 P.S. To get the version numbers for this table, I ran a quick perl script over the output from: % pkg contents -H -r -t depend -a type=incorporate -o fmri \ `pkg contents -H -r -t depend -a type=incorporate -o fmri [email protected],5.11-0.175.1.0.0.24` \ | sort /tmp/11.1 % pkg contents -H -r -t depend -a type=incorporate -o fmri \ `pkg contents -H -r -t depend -a type=incorporate -o fmri [email protected],5.11-0.175.0.0.0.2` \ | sort /tmp/11.0

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  • hyper-v fails when attaching more disk to VM. The VM won't start and generates an error

    - by CasperDK
    I'm lost at what to do about this: Hi... System: Windows 2008 R2 Hyper-V farm running with failover cluster with a EVA 4400 as backend. When I attach a new disk to a VM it fails when I try to start it. If I move the VM to another, say node 1, I can add the disk and I can get them to start. If I move the VM back to node 2 where the problem arose and the VM is running, I get an error during live migration and the VM fails back to node1 where it did run... So it's like there is something wrong with Hyper-V on node 2 and not node 1. Also node 3 has the same issue. Restarting the nodes is NOT an option since I will have this problem again at a later time AND because not all the VMs can run on node 1 which means my client company will experience downtime on the VMs not running on node 1. Any fix for this? An update I have missed perhaps? It has been two years... Here are the errors: An error ocurred while attempting to change the state of virtual machine XXX. 'XXX' failed to start. Microsoft Emulated IDE Controller (Instance ID {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}): Failed to power on with Error 'A device attached to the system is not functioning.' Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' 'XXX' failed to start. (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) Microsoft Emulated IDE Controller (Instance ID {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}): Failed to power on with Error 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) 'XXX': Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) 'XXX': Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) An error ocurred while attempting to change the state of virtual machine XXX. 'XXX' failed to start. Microsoft Emulated IDE Controller (Instance ID {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}): Failed to power on with Error 'A device attached to the system is not functioning.' Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' 'XXX' failed to start. (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) Microsoft Emulated IDE Controller (Instance ID {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}): Failed to power on with Error 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) 'XXX': Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) 'XXX': Failed to open attachment 'X:\XXX.vhd'. Error: 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) An error ocurred while attempting to change the state of virtual machine XXX. 'XXX' failed to start. Microsoft Emulated IDE Controller (Instance ID {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}): Failed to power on with Error 'A device attached to the system is not functioning.' Failed to open attachment 'c:\clusterstorage/volume1/XXX.vhd'. Error: 'A device attached to the system is not functioning.' Failed to open attachment 'c:\clusterstorage/volume1\XXX.vhd'. Error: 'A device attached to the system is not functioning.' 'XXX' failed to start. (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) Microsoft Emulated IDE Controller (Instance ID {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}): Failed to power on with Error 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) 'XXX': Failed to open attachment 'c:\clusterstorage/volume1\XXX.vhd'. Error: 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) 'XXX': Failed to open attachment 'c:\clusterstorage/volume1\XXX.vhd'. Error: 'A device attached to the system is not functioning.' (0x8007001F). (Virtual machine 36563C78-65B5-4C40-A52D-689BB39E8B08) In the Hyper-V logs I found some more errors: In the hyper-v VMMS logs I have this: 'ServerName' failed to perform the operation. The virtual machine is not in a valid state to perform the operation. (Virtual machine ID 0A6CC4A9-39D6-4413-8CF0-B6DAA35B68D7)

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  • Exposing BL as WCF service

    - by Oren Schwartz
    I'm working on a middle-tier project which encapsulates the business logic (uses a DAL layer, and serves a web application server [ASP.net]) of a product deployed in a LAN. The BL serves as a bunch of services and data objects that are invoked upon user action. At present times, the DAL acts as a separate application whereas the BL uses it, but is consumed by the web application as a DLL. Both the DAL and the web application are deployed on different servers inside organization, and since the BL DLL is consumed by the web application, it resides in the same server. The worst thing about exposing the BL as a DLL is that we lost track with what we expose. Deployment is not such a big issue since mostly, product versions are deployed together. Would you recommend migrating from DLL to WCF service? if so, why ? Do you know anyone who had a similar experience ? Thank you !

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  • Exposing BL as WCF service

    - by Oren Schwartz
    I'm working on a middle-tier project which encapsulates the business logic (uses a DAL layer, and serves a web application server [ASP.net]) of a product deployed in a LAN. The BL serves as a bunch of services and data objects that are invoked upon user action. At present times, the DAL acts as a separate application whereas the BL uses it, but is consumed by the web application as a DLL. Both the DAL and the web application are deployed on different servers inside organization, and since the BL DLL is consumed by the web application, it resides in the same server. The worst thing about exposing the BL as a DLL is that we lost track with what we expose. Deployment is not such a big issue since mostly, product versions are deployed together. Would you recommend migrating from DLL to WCF service? if so, why ? Do you know anyone who had a similar experience ?

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  • Can I flash a PCI-E device's Firmware in a VM if the VM has exclusive IOMMU access?

    - by RibaldEddie
    I have a PCI-E Dell Perc 6/i RAID card that I'd like to flash with the latest firmware. Apparently I need either a Redhat / Centos OS or Windows in order to flash the firmware, but I have a VMWare 5.0.1 ESX hypervisor installed on the box and a CentOS guest OS. My motherboard support IOMMU and I have successfully used VMWare's PCI Passthrough feature to give VMs exclusive access to a PCI-E device. Is it safe to flash the firmware of a PCI-E device if that device is passed through to a single VM using the passthrough feature of VMware? Or should I boot one of the supported OSes directly on the bare metal?

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  • How to push changes from Test server to Live server?

    - by anonymous
    As a beginner, I finally noticed the issue with making changes to the live server I've been working on, now that I have a couple users on it, since I bring it down so often. I created an EC2 image of my live server and set up a separate instance on EC2, so now I have 2 EC2 instances, Stage and Production. I set up GitHub and push changes to stage and test my code there, and when it's all done and working, I push it to the production branch, and everything is good. And there is a slight issue here since I name my files config_stage.js and config_production.js and set up .gitignore on each server, and in my code, I would have it read the ENV flags and set up the appropriate configs, is this the correct approach? And my main question is: how do you keep track of non-code changes to the server? For example, I installed HAProxy, Stunnel, Redis, MongoDB and several other things onto the Stage server for testing and now that it's all working and good, how do I deploy them to production? Right now, I'm just keeping track of everything I installed and copying configuration files over, which is very tedious and I'm afraid I may have missed a step somewhere. Is there a better way to port these changes over from my test server to my live server?

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  • Why does jmeter not work?

    - by Foolish
    I use jmeter to record requests and then perform a performance test after it records all the requests with proxy server. These requests contain a post form. After that I run the test cases, but I found the post form doesn't work -- it cannot create a record in the website's database automatically. But before that I used Webload and everything was OK. What's the problem? What can I do for this?

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  • How to use dd to make splitted ISO images from an storage device?

    - by Gustavo Bandeira
    This is a double question, I just hope it's valid. I need to know how to use dd to make splitted ISO images from some storage device, I'm doing it through SSH: the process is slow and the risk of faling at the mid of the operation (1) is high then I need to know how to make these splitted ISO images from my storage device. (2) I'm searching for some reference on dd, it could be a book or a good website about it for when any doubt arises. 1 - I'm doing it on a ~60GB storage device, it took me a whole day to copy ~10GB from this disk. 2 - For curious people, I'm trying to recover an accidentaly deleted file from an iPod, until now I've been able to make the whole process, I just need to improve it beucase I left it copying the disk yesterday: Today it gave me an error when it was at ~10GB.

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  • How should i setup my PC partition?

    - by acidzombie24
    I want to clear out my PC and setup the partitions. Right now i have it as XP, Win-7, Vista, XP/Test/Spare I notice my PC is pretty good at virtualization, at least virtualizing linux. I also rarely boot out of my primary XP although i do find myself deving on windows 7 once in a while. So i figure i can have it as XP, Windows 7, data partition then... what? i still have one more slot. There may be a more useful way to do this so what do you guys think? My bro has 2gb partition that is used to restore the OS which can be ran during the bootup process. However i dont think i can do that with mine. So, what are you thoughts?

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  • i5 vs. i7 processor dev laptop

    - by vector
    Greetings! I need to get a laptop for dev work ( mostly server side Java, NetBeans ) and wonder if anyone had a chance to use either the i5 or i7 based laptop? Is the i7 an overkill? ... or will the i5 handle it just fine? I'm thinking something from the HP line running Ubuntu. Thanks

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  • Why does RDP Licensing is licensing the same device multiple times? [closed]

    - by NeerPatel
    Possible Duplicate: Can you help me with my software licensing issue? I've got a Citrix XenApp 6.5 Farm running on Win 2008 R2 Servers. I purchased 300 Device RDP/Remote App Licenses for ~200 users. We went with Device licenses, because most of the end users use the same machines. After 1 month of operating, we started to run out of licenses. It turns out the licensing service is consuming multiple licenses for the same machine. I can revoke licenses, but there is a limit to how many I can do. Is this operating correctly? The only explanation I can come up with is that the Licensing service is giving a license to a device for every server it connects to in our Citrix farm.

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  • How to set Virtualbox appliance as webdev portable sollution?

    - by tenshimsm
    I just want to set a a Virtualbox virtual appliance to make it portable. Meaning that I'll enable a network config which will not need to be changed when I am using my laptop in a different network. I want the virtual machine to have internet access to keep it updated and be able to always have direct access from host using, for example, the IP 10.0.2.100 even when I am in a 192.168.0.1 network. So the first virtual network adapter will have a static ip (10.0.2.100) and the second will receive it from the DHCP. I don't know if 2 virtual adapters are needed or just one to accomplish that.

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  • Transition domain to new web host without waiting for DNS propagation

    - by jcmoney
    I was considering switching to Amazon EC2 to host my website to handle more traffic. It seems like I would have to update DNS records to point to the new server but I was wondering if there was a way to avoid having to wait for the new DNS record to propagate. Putting the code on both hosts would not work for me since the app writes to a database pretty frequently. I thought about just using a meta redirect or php redirect on the old host to redirect to the new host ip but was wondering if there's a better more accepted way of doing this.

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  • Lightweight Linux distro that includes developer tools? (or, the most BSD-like Linux)

    - by RevAaron
    I cut my teeth on Minix and Slackware 1.1, but I've been in the OS X Wilderness for the last few years. I'm trying to standardize on a Linux distribution for personal and work-related use on less powerful laptops and under virtualization. So far, NetBSD and OpenBSD are the best fit for my purposes- but after plenty of frustration I've come to the conclusion that I need to stick with Linux to get the hardware and software support that comes with it. What I like about NetBSD/OpenBSD that I'd like to keep: X, but no default KDE, GNOME or XFCE! A sensible /etc and dot file setup- startx calls xinit, xinit looks for ~/.xinitrc; nothing more complicated than that is needed. Command line tools and file-based configuration: I shouldn't need a GUI to connect to a WAP. Decent selection of binary packages; building from source is OK, but nothing source-only like Gentoo. pkg_add (BSD) and apt-get both have treated me well in the past. Modest RAM and HDD requirements: boot + X + awesome+ two xterms takes up 80 MB on OpenBSD and 240 MB on Debian 5 and Crunchbang In my experience, most "lightweight" and Live CDs focus on a nice desktop environment crammed into a CD or USB stick; once you add build-essentials you end up with something just about as bloated as Ubuntu or Debian full install. Crunchbang is a great example. Thanks in advance for all suggestions!

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  • Good infrastructure design questions for software developers?

    - by JakeRobinson
    Building on Jeff's blog post titled Vampires (Programmers) versus Werewolves (Sysadmins) From my perspective, the whole point of the company is to talk about what we're doing. Getting things done is important, of course, but we have to stop occasionally to write up what we're doing, how we're doing it, and why we're even doing it in the first place -- including all our doubts and misgivings and concerns. So, what are some questions you ask your software developers when they request a server?

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  • Tasks carried out for a Software Project

    - by Sara
    Hi, We were asked to propose a web based system for a shop, for an assignment. As i'm a newbee for project management stuff find it quite difficult to come with Tasks for our Gantt chart. Can someone pls suggest a sample gantt or main tasks followed in developing such system Thanks

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  • how does svn work with apache?

    - by ajsie
    i've got ubuntu installed with lamp. im using webdav to upload/download files to/from the ubuntu web server, after i have edited the php source files in netbeans. however, i wonder what is best practice for editing source files and committing these changes to the new website. cause if we are 2-3 developers, i guess we have to use svn. but i have never used it before so i wonder how it works. should i install it and then select the /var/www (apaches webroot) as the repository folder? then when i check in, all the changes will apply immediately? could someone please explain following steps: how to download, edit the source files, upload the files and see the new changes in the website. cause i have only worked with a local apache before, and it was only me. now there will be some more programmers so i have to set up a decent, central environment for this, and have to know how netbeans, svn, webdav and apache works all together. thanks!

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  • Multiple VM environment for developing/testing

    - by Hippo
    I was asked to create a setup for automated deployment, configuration, installation/updates of websites. A bunch of small websites will be bundled on one server. If more website will come up a new server will be created... I decided to us chef for this task. All servers will be running Ubuntu at the same version and configuration. The actual question: Everything needs to be tested properly before starting live deployment, so my question is: What is the best virtualisation tool to run multiple (5 - 10) virtual machines on a Ubuntu Laptop? Requirements: easy setup, fast (clone/snapshot of VMs) All VMs should be easily connected to the internet and should be able to communicate to each other (Open-Source / free would be great) So far I looked into: Virtual box is more for Desktop virtualisation, Cloning not possible, every new machine needs to be installed VMware Player Any suggestions? If there are any question about what I am doing please comment on this question, I will answer as soon as possible. This question is not about the actual set up, it is about a nice working environment.

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