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• e2fsck / resize2fs problems

  - by BlakBat

  I've got 6 drives (each 1.5T, all same model and firmware revision) that are part of a RAID5 array. The RAID5 makes a LVM volume group and a logical group. The latter contains only one ext3 partition. I've recently ran: e2fsck -f /dev/vg03/lv01 && resize2fs -M /dev/vg03/lv01 which exited without an error. Now when I try to mount /dev/vg03/lv01 I get: EXT3-fs error (device dm-0): ext3_check_descriptors: Block bitmap for group 30533 not in group (block 1000532368)! EXT3-fs: group descriptors corrupted! How do I get out of this predicament? This is all the info I can currently give you: fdisk -l /dev/sd[cdefgh] shows (correctly) that they are "Linux raid autodetect" but fdisk now shows: fdisk -l /dev/md0 Disk /dev/md0: 7501.5 GB, 7501495664640 bytes ... Disk identifier: 0x00000000 Disk /dev/md0 doesn't contain a valid partition table (instead of a LVM type partition) fdisk -l /dev/vg03/lv01 Disk /dev/vg03/lv01: 7501.5 GB, 7501491732480 bytes ... Disk identifier: 0x00000000 Disk /dev/vg03/lv01 doesn't contain a valid partition table (instead of a ext3 type partition) I've tried: e2fsck -fy /dev/vg03/lv01 e2fsck 1.41.12 (17-May-2010) e2fsck: Group descriptors look bad... trying backup blocks... Block bitmap for group 30533 is not in group. (block 1000532368) Relocate? yes Inode bitmap for group 30533 is not in group. (block 1000532369) Relocate? yes Pass 1: Checking inodes, blocks, and sizes Relocating group 30533's block bitmap to 1000524246... Error allocating 1 contiguous block(s) in block group 30533 for inode bitmap: Could not allocate block in ext2 filesystem e2fsck: aborted Extra information I can give you: cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active (auto-read-only) raid5 sdg1[0] sdh1[5] sdf1[4] sde1[3] sdc1[2] sdd1[1] 7325679360 blocks level 5, 128k chunk, algorithm 2 [6/6] [UUUUUU] bitmap: 1/175 pages [4KB], 4096KB chunk unused devices: Lastly, all smartctl tests (short and extendend) showed no errors on any of the disks. Should I try to resize2fs to grow /dev/vg03/lv01 and redo a e2fsck ? Should I cfdisk /dev/md0 and /dev/vg03/lv01 back to their real types? Thanks in advance for all and any help. 2011-09-20 UPDATE I issued the following commands and was able to remount the partition, but by viewing the size (df) of before and after, it seems that 1Tb of data have gone missing. By checking the MD5SUMS (from an old backup) of some files with the "same" files from the remounted partition, some errors have been detected. Commands issued to remount the partition were: dumpe2fs /dev/vg03/lv01 Block count: 1000491435<br /> Block size: 4096<br /> tune2fs -O ^has_journal /dev/vg03/lv01 resize2fs -p /dev/vg03/lv01 dumpe2fs /dev/vg03/lv01 Block count: 1831418880<br /> Block size: 4096<br /> mount -o ro,noatime /dev/vg03/lv01 /mnt/raid OK... but files have been damaged / gone missing.

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• How can I recover an ext4 filesystem corrupted after a fsck?

  - by Regan

  I have an ext4 filesystem on luks over software raid5. The filesystem was operating "just fine" for several years when I was beginning to run out of space. I had a 9T volume on 6x2T drives. I began upgrading to 3T drives by doing the mdadm fail, remove, add, rebuild, repeat process until I had a larger array. I then grew the luks container, and then when I unmounted and tried to resize2fs I was given the message the filesystem was dirty and needed e2fsck. Without thinking I just did e2fsck -y /dev/mapper/candybox and it began spewing all kinds of inode being removed type messages (can't remember exactly) I killed e2fsck and tried to remount the filesystem to backup data I was concerned about. When trying to mount at this point I get: # mount /dev/mapper/candybox /candybox mount: wrong fs type, bad option, bad superblock on /dev/mapper/candybox, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Looking back at my older logs I noticed the filesystem was giving this error each time the machine booted: kernel: [79137.275531] EXT4-fs (dm-2): warning: mounting fs with errors, running e2fsck is recommended So shame on me for not paying attention :( I then tried to mount using every backup superblock (one after another) and each attempt left this in my log: EXT4-fs (dm-2): ext4_check_descriptors: Checksum for group 0 failed (26534!=65440) EXT4-fs (dm-2): ext4_check_descriptors: Checksum for group 1 failed (38021!=36729) EXT4-fs (dm-2): ext4_check_descriptors: Checksum for group 2 failed (18336!=39845) ... EXT4-fs (dm-2): ext4_check_descriptors: Checksum for group 11911 failed (28743!=44098) BUG: soft lockup - CPU#0 stuck for 23s! [mount:2939] Attempts to restart e2fsck results in: # e2fsck /dev/mapper/candybox e2fsck 1.41.14 (22-Dec-2010) e2fsck: Group descriptors look bad... trying backup blocks... candy: recovering journal e2fsck: unable to set superblock flags on candy At this point, I decided it best to order some more drives and make an image using ddrescue Now two weeks later I have an image of the luks partition in a .img file. # ls -lh total 14T -rw-r--r-- 1 root root 14T Oct 25 01:57 candybox.img -rw-r--r-- 1 root root 271 Oct 20 14:32 candybox.logfile After numerous attempts using everything I could find online I could not coerce e2fsck to do anything on the image, so I used mkfs.ext4 -L candy candybox.img -m 0 -S and I was able to mount the dirty filesystem readonly without the journal and recover 960G of data. It gave all kinds of errors of various directories not existing and so forth but I was able to get some stuff. Which gave me some hope! I then ran e2fsck again and it had to recreate the root inode and gave a massive list of correcting group counts, I accepted the root inode creation and said no to everything else, leaving a completely empty filesystem. Re-ran again and said yes to all questions with the same result but now a "clean" but empty filesystem. extundelete gives me 0 recoverable inodes found. And now I'm stuck again, I can't come up with any other methods other than dropping to something like photorec which will give me an absolute mess with how large the filesystem was. I'm willing to re-copy the image from the original array and start over, if I can get any suggestions or ideas on a way to get more of my files back. I wish I could give more detailed logs of the commands that have run, but the output is long scrolled passed except for what gets logged to syslog and my memory is not as detailed due to the timeframe this has occurred over. Any help is greatly appreciated!

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• RedHat 5.5 server does not show per processor memory utilization

  - by Mike S

  I have been searching all over internet but not finding any leads. I have a system with a memory leak that I am trying to troubleshoot. Unfortunately I am not able to see per processor memory utilization. Here are the outputs of TOP and PS commands. Linux SERVER_NAME 2.6.18-194.8.1.el5 #1 SMP Wed Jun 23 10:52:51 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux top - 09:17:13 up 18:43, 3 users, load average: 0.00, 0.00, 0.00 Tasks: 375 total, 1 running, 373 sleeping, 0 stopped, 1 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 32922828k total, 32776712k used, 146116k free, 267128k buffers Swap: 5245212k total, 0k used, 5245212k free, 32141044k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 15 0 10348 744 620 S 0.0 0.0 0:05.65 init 2 root RT -5 0 0 0 S 0.0 0.0 0:00.05 migration/0 3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0 4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0 5 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/1 6 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1 7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1 8 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/2 9 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/2 10 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/2 11 root RT -5 0 0 0 S 0.0 0.0 0:00.01 migration/3 12 root 34 19 0 0 0 S 0.0 0.0 0:00.01 ksoftirqd/3 13 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/3 14 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/4 15 root 34 19 0 0 0 S 0.0 0.0 0:00.01 ksoftirqd/4 16 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/4 17 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/5 18 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/5 19 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/5 20 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/6 % ps -auxf | sort -nr -k 4 | head -10 Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ xfs 6205 0.0 0.0 23316 3892 ? Ss Aug19 0:00 xfs -droppriv -daemon uuidd 6101 0.0 0.0 60976 224 ? Ss Aug19 0:00 /usr/sbin/uuidd USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND smmsp 6130 0.0 0.0 57900 1784 ? Ss Aug19 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue rpc 5126 0.0 0.0 8052 632 ? Ss Aug19 0:00 portmap root 99 0.0 0.0 0 0 ? S< Aug19 0:00 [events/1] root 98 0.0 0.0 0 0 ? S< Aug19 0:00 [events/0] root 97 0.0 0.0 0 0 ? S< Aug19 0:00 [watchdog/31] root 96 0.0 0.0 0 0 ? SN Aug19 0:00 [ksoftirqd/31] root 95 0.0 0.0 0 0 ? S< Aug19 0:00 [migration/31] Any help with this is appretiate.

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• Set up lnux box for hosting a-z [apache mysql php ssl]

  - by microchasm

  I am in the process of reinstalling the OS on a machine that will be used to host a couple of apps for our business. The apps will be local only; access from external clients will be via vpn only. The prior setup used a hosting control panel (Plesk) for most of the admin, and I was looking at using another similar piece of software for the reinstall - but I figured I should finally learn how it all works. I can do most of the things the software would do for me, but am unclear on the symbiosis of it all. This is all an attempt to further distance myself from the land of Configuration Programmer/Programmer, if at all possible. I can't find a full walkthrough anywhere for what I'm looking for, so I thought I'd put up this question, and if people can help me on the way I will edit this with the answers, and document my progress/pitfalls. Hopefully someday this will help someone down the line. The details: CentOS 5.5 x86_64 httpd: Apache/2.2.3 mysql: 5.0.77 (to be upgraded) php: 5.1 (to be upgraded) The requirements: SECURITY!! Secure file transfer Secure client access (SSL Certs and CA) Secure data storage Virtualhosts/multiple subdomains Local email would be nice, but not critical The Steps: Download latest CentOS DVD-iso (torrent worked great for me). Install CentOS: While going through the install, I checked the Server Components option thinking I was going to be using another Plesk-like admin. In hindsight, considering I've decided to try to go my own way, this probably wasn't the best idea. Basic config: Setup users, networking/ip address etc. Yum update/upgrade. Upgrade PHP: To upgrade PHP to the latest version, I had to look to another repo outside CentOS. IUS looks great and I'm happy I found it! cd /tmp #wget http://dl.iuscommunity.org/pub/ius/stable/Redhat/5/x86_64/epel-release-1-1.ius.el5.noarch.rpm #rpm -Uvh epel-release-1-1.ius.el5.noarch.rpm #wget http://dl.iuscommunity.org/pub/ius/stable/Redhat/5/x86_64/ius-release-1-4.ius.el5.noarch.rpm #rpm -Uvh ius-release-1-4.ius.el5.noarch.rpm yum list | grep -w \.ius\. [will list all packages available in the IUS repo] rpm -qa | grep php [will list installed packages needed to be removed. the installed packages need to be removed before you can install the IUS packages otherwise there will be conflicts] #yum shell >remove php-gd php-cli php-odbc php-mbstring php-pdo php php-xml php-common php-ldap php-mysql php-imap Setting up Remove Process >install php53 php53-mcrypt php53-mysql php53-cli php53-common php53-ldap php53-imap php53-devel >transaction solve >transaction run Leaving Shell #php -v PHP 5.3.2 (cli) (built: Apr 6 2010 18:13:45) This process removes the old version of PHP and installs the latest. To upgrade mysql: Pretty much the same process as above with PHP #/etc/init.d/mysqld stop [OK] rpm -qa | grep mysql [installed mysql packages] #yum shell >remove mysql mysql-server Setting up Remove Process >install mysql51 mysql51-server mysql51-devel >transaction solve >transaction run Leaving Shell #service mysqld start [OK] #mysql -v Server version: 5.1.42-ius Distributed by The IUS Community Project And this is where I'm at. I will keep editing this as I make progress. Any tips on how to Configure Virtualhosts for SSL, setting up a CA, setting up SFTP with openSSH, or anything else would be appreciated.

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• How to install Delorme StreetAtlas (any version) + GPS inside VirtualBox VM?

  - by hotei

  When I try to run the install program I get a popup message that says the installer program is not a valid executable. Background: I want a GPS with maps on my laptop running Ubuntu 10.4LTS. Unfortunately I can't find a decent native Linux GPS solution with 50 state US street level coverage. I have VirtualBox VMs available for WinXP and Win7 (among others). The VMs work fine with MicroSoft Streets and Trips (2010) and MapNGo 5 (a very! old Delorme product), but while both these products support GPS, they don't support the Earthmate LT-40 USB GPS I already have. I've got pretty much every Delorme Street Atlas they've released in the last decade and none of them will install in a VM. Any help would be much appreciated. Clarification: I've installed the Delorme products from these CDs before and the disks are fine - as long as installation is done on a "physical" machine. Added: I've tried install from an iso as well as the real CD. No difference in result (setup.exe is not a valid executable) The WinXP is SP-2 (held back on purpose at this point - I'll snapshot and fork a later SP to test). The Win2K is SP-6a. Win7(32) VM is whatever updates came out last week. The USB setup is working at least to the point where the GPS device is active in the device list (has an x in the box). At this point its not relevant because the program that needs to read it can't even be installed. Added 9-19: Added wine as harrymc suggested. Initial result was no change. Here's wines error message. The file '/media/Disk1/setup.exe' is not marked as executable. If this was downloaded or copied form an untrusted source, it may be dangerous to run. For more details, read about the executable bit. At first I thought the execute bit was the problem, but looking at several other windows CDs I see that the execute bit is not set on their exe files (which install to VM without error). Still it was worth a shot so I copied the StreetAtlas 9 DVD to my hard disk, changed the on-disk exe files to have the execute bit set and tried to install again. This time the install via wine got me through the installation process. When I start the program it bombs immediately, so we haven't made much real progress so far. I very much prefer the VM solution to wine, so I'm going back to that for now. To recap the VM situation, using an updated XP with SP3 and all recommended hotfixes: StreetAtlas 2009 USA fails with "not marked as executable". StreetAtlas 2007 USA fails with "not marked as executable". StreetAtlas 9 (copyright 2001) fails with "not marked as executable". SteeetAtlas (copyright 1991) fails with "not marked as executable" Delorme Topo 4 (copyright 2002) fails with "not marked as executable". Just about ready to give up. So I switched from XP VM to Win7 VM and tried StreetAtlas 2009 again. This time it installs. Earthmate USB GPS works. WTH? I feel like the monkey who just wrote a line of Shakespear. I'm smiling because it worked, but I have no clue why. I'm awarding the bounty to harrymc because wine did give some useful insight into the problem and a +1 to goyiux as thanks for helping.

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• Dynamics CRM error "A currency is required if a value exists in a money field" after converting Acti

  - by Evgeny

  We have a Dynamics CRM 4.0 instance with some custom attributes of type "money" on the Case entity and on all Activity entities (Email, Phone Call, etc.) When I use the built-in "Convert Activity to Case" functionality I find that the resulting Case does not have a Currency set, even if the Activity it was created from does have it. Whenever the case is opened the user then gets this JavaScript error: A currency is required if a value exists in a money field. Select a currency and try again. This is extremely annoying! How do I fix it? Is there any way I can set the currency? It needs to be done synchronously, because the Case is opened immediately when it's created from an Activity. So even if I started a workflow to set the currency the user would still get that error at least once. Alterntatively, can I just suppress the warning somehow? I don't really care about setting the Currency, I just want the error gone. Thanks in advance for any help!

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• Error message: "Two different contracts have the same ConfigurationName" when downloading wsdl from

  - by rwwilden

  I get the following error message when I try to use svcutil to generate a client proxy for a xamlx file that is hosted by AppFabric beta 2: Two different contracts have the same ConfigurationName I understand the message, however, I cannot find its cause or how to fix it. I'm following the 'Introduction to Workflow Services' lab from the VS2010RC training kit. The web application has two services: SubmitApplication.xamlx and EducationScreening.xamlx. I'm not sure why but both of them have four endpoints. If I take a look via the AppFabric Dashboard in IIS Mgmt Studio: basicHttpBinding (Contract: *) (Type: Application(Default)) netNamedPipeBinding (Contract: System.ServiceModel.Activities.IWorkflowInstanceManagement) (Type: System (workflowControlEndpoint)) netNamedPipeBinding (Contract: *) (Type: Application (Default)) serviceMetadataHttpGetBinding (Contract: serviceMetadataHttpGetContract) (Type: System (serviceMetadataEndpoint)) When taking a look at the SubmitApplication.xamlx in a browser, I see the following stacktrace: [InvalidOperationException: Two different contracts have the same ConfigurationName.] System.ServiceModel.Activities.WorkflowServiceHost.CreateDescription(IDictionary`2& implementedContracts) +361 System.ServiceModel.ServiceHostBase.InitializeDescription(UriSchemeKeyedCollection baseAddresses) +174 System.ServiceModel.Activities.WorkflowServiceHost.InitializeDescription(WorkflowService serviceDefinition, UriSchemeKeyedCollection baseAddresses) +82 System.ServiceModel.Activities.WorkflowServiceHost.InitializeFromConstructor(WorkflowService serviceDefinition, Uri[] baseAddresses) +206 System.ServiceModel.Activities.Activation.WorkflowServiceHostFactory.CreateWorkflowServiceHost(WorkflowService service, Uri[] baseAddresses) +43 System.ServiceModel.Activities.Activation.WorkflowServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) +974 System.ServiceModel.HostingManager.CreateService(String normalizedVirtualPath) +1423 System.ServiceModel.HostingManager.ActivateService(String normalizedVirtualPath) +50 System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) +1132 [ServiceActivationException: The service '/HRApplicationServices/SubmitApplication.xamlx' cannot be activated due to an exception during compilation. The exception message is: Two different contracts have the same ConfigurationName..] System.Runtime.AsyncResult.End(IAsyncResult result) +889824 System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +179150 System.Web.AsyncEventExecutionStep.OnAsyncEventCompletion(IAsyncResult ar) +107 Can anyone tell me what I'm doing wrong? I haven't configured any of the bindings myself. The BasicHttpBinding is what you get by default in .NET 4 when hosting a service inside a web application. The other bindings are configured by AppFabric. I can't find their configuration anywhere. Kind regards, Ronald Wildenberg

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• Instructions on using TortoiseGit to interact with an SVN repository?

  - by markerikson

  I've been using TortoiseSVN on Windows for years with local filesystem repositories for my own projects. I'm planning to start collaborating with a friend on one of the projects, and will be shifting the repository to my own website. I've read a lot of "git beats SVN!" posts over the last couple years, and figured I ought to at least see what the fuss was about. Some research turned up the "git svn" command, and that TortoiseGit claims to have some level of git-svn support. I like the idea of keeping the SVN repository, and doing some local commits or branches with git before committing them to the repository. The "shelve" command also sounds useful. Unfortunately, while there's a number of CLI git-svn tutorials, there's nothing for TortoiseGit (which admittedly seems to be still in early development). As a result, I'm having problems trying to figure out what workflow I need to get these pieces to cooperate. I have an SVN repository in D:\Projects\repositories\MyProject. I created D:\Projects\temp\gittest, and tried to do a TortoiseGit "Git Clone" of the repository. From there, I've had issues trying to indicate the location of the trunk/branches/tags folders (which are just the standard layout in my repository). I was only able to get useful results when I left those unchecked. When I did seem to get the git repository started correctly, I was able to make some changes and do a couple git commits, but then had problems doing an SVN DCommit. So, I'm hoping someone out there can provide a reasonably detailed set of instructions on how to correctly use TortoiseGit with an existing SVN repository (with the repository on either the local filesystem or on a remote server). No "don't use SVN!" responses, please - I'm interested in learning how to get these two pieces to work together. If you feel TortoiseGit's SVN support isn't mature enough to make this work, that would also be useful information. Thanks!

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• What is the difference between System.Speech.Recognition and Microsoft.Speech.Recognition?

  - by Michael

  There are two similar namespaces and assemblies for speech recognition in .NET. I’m trying to understand the differences and when it is appropriate to use one or the other. There is System.Speech.Recognition from the assembly System.Speech (in System.Speech.dll). System.Speech.dll is a core DLL in the .NET Framework class library 3.0 and later There is also Microsoft.Speech.Recognition from the assembly Microsoft.Speech (in microsoft.speech.dll). Microsoft.Speech.dll is part of the UCMA 2.0 SDK I find the docs confusing and I have the following questions: System.Speech.Recognition says it is for "The Windows Desktop Speech Technology", does this mean it cannot be used on a server OS or cannot be used for high scale applications? The UCMA 2.0 Speech SDK ( http://msdn.microsoft.com/en-us/library/dd266409%28v=office.13%29.aspx ) says that it requires Microsoft Office Communications Server 2007 R2 as a prerequisite. However, I’ve been told at conferences and meetings that if I do not require OCS features like presence and workflow I can use the UCMA 2.0 Speech API without OCS. Is this true? If I’m building a simple recognition app for a server application (say I wanted to automatically transcribe voice mails) and I don’t need features of OCS, what are the differences between the two APIs?

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• GIT repository layout for server with multiple projects

  - by Paul Alexander

  One of the things I like about the way I have Subversion set up is that I can have a single main repository with multiple projects. When I want to work on a project I can check out just that project. Like this \main \ProductA \ProductB \Shared then svn checkout http://.../main/ProductA As a new user to git I want to explore a bit of best practice in the field before committing to a specific workflow. From what I've read so far, git stores everything in a single .git folder at the root of the project tree. So I could do one of two things. Set up a separate project for each Product. Set up a single massive project and store products in sub folders. There are dependencies between the products, so the single massive project seems appropriate. We'll be using a server where all the developers can share their code. I've already got this working over SSH & HTTP and that part I love. However, the repositories in SVN are already many GB in size so dragging around the entire repository on each machine seems like a bad idea - especially since we're billed for excessive network bandwidth. I'd imagine that the Linux kernel project repositories are equally large so there must be a proper way of handling this with Git but I just haven't figured it out yet. Are there any guidelines or best practices for working with very large multi-project repositories?

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• R and version control for the solo data analyst

  - by Jeromy Anglim

  Many data analysts that I respect use version control. For example: http://github.com/hadley/ See comments on http://permut.wordpress.com/2010/04/21/revision-control-statistics-bleg/ However, I'm evaluating whether adopting a version control system such as git would be worthwhile. A brief overview: I'm a social scientist who uses R to analyse data for research publications. I don't currently produce R packages. My R code for a project typically includes a few thousand lines of code for data input, cleaning, manipulation, analyses, and output generation. Publications are typically written using LaTeX. With regards to version control there are many benefits which I have read about, yet they seem to be less relevant to the solo data analyst. Backup: I have a backup system already in place. Forking and rewinding: I've never felt the need to do this, but I can see how it could be useful (e.g., you are preparing multiple journal articles based on the same dataset; you are preparing a report that is updated monthly, etc) Collaboration: Most of the time I am analysing data myself, thus, I woudln't get the collaboration benefits of version control. There are also several potential costs involved with adopting version control: Time to evaluate and learn a version control system A possible increase in complexity over my current file management system However, I still have the feeling that I'm missing something. General guides on version control seem to be addressed more towards computer scientists than data analysts. Thus, specifically in relation to data analysts in circumstances similar to those listed above: Is version control worth the effort? What are the main pros and cons of adopting version control? What is a good strategy for getting started with version control for data analysis with R (e.g., examples, workflow ideas, software, links to guides)?

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• "You do not have permissions to do this operation. Ask your website administrator to change your pem

  - by user288728

  I need some help regarding the above title. After applying SP1 pack on our SharePoint Server 2007 (MOSS 3.0) the workflows aren't working anymmore on one of the WebApplications (located in SSP2) Workflows work, however on other existing applications (on SSP1 or SSP2) or newly created applications (on SSP1 or SSP2). Details of error: 1. Default / Built in SharePoint Workflows are not starting 2. Sharepoint Designer Workflows throwing the following error message: "You do not have permissions to do this operation. Ask your website administrator to change your pemissions and then try again, or log on with another account that has this permission. To log on with another user account click ok. " 3. Before applying the SP1 on MOSS the workflows were working perfectly fine on this WebApplication. so far: 1. I am logged in as Administrator (bot on Sharepoint site or when working with Sharepoint Designer). 2. Administrator is included in the list Site Collection Administrators 3. I noticed in Sharepoint designer that the username used for creating the workflow is 'converted' into SHAREPOINT\system (in the Modified By Column). Has anybody come accross/fixed this error? Any help much appreciated. Thanks D

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• Ideas for OpenSource CMS in ASP.NET MVC

  - by rajesh pillai

  I am in the process of collecting ideas for building an opensource CMS based on ASP.net framework. I have choosen ASP.NET MVC with Jquery as the tool to develop this. I have made this as community wiki. Background: Most of the good CMS that is available is built on PHP, though off late CMS built on ASP.net framework seems to be cropping up. I would like to collect ideas/suggestion/expectations from an opensource CMS system for ASP.net platform. I am looking for expectation from technology and features that you wish could find in a modern CMS and any other thoughts/ideas that comes to your mind. Your input would be of great help in this direction. Meanwhile I am also reviewing many opensource CMS system built on ASP.net as well as MS Office Sharepoint to get ideas and I would update my findings here for your reference. The following are some of the opensource CMS/BlogEngines that I am in the process of reviewing. -Oxite (ASP.net MVC) : This is the new kid on the block -Wordpress -BlogEngine.net -Umbraco Some of the features that I can think of is noted below Simplified content creation Support Multiple content author Metadata feature Workflow engine Simplified deployment List based contents (sharepoint like) Customizable URL's Support content Caching Roles (contenauthor, contentpublisher etc) Support different types of content (like html, txt, document, image, videos) Skinnable (support extensible themes) Localization & Globalization Unlimited nesting of categories Readymade template for blog, forums,survey. Good documentation You can add your points or add some depth to any of the above feature.

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• Database Change Management - Setup for Initial Create Scripts, Subsequent Migration Scripts

  - by Martin Aatmaa

  I've got a database change management workflow in place. It's based on SQL scripts (so, it's not a managed code-based solution). The basic setup looks like this: Initial/ Generate Initial Schema.sql Generate Initial Required Data.sql Generate Initial Test Data.sql Migration 0001_MigrationScriptForChangeOne.sql 0002_MigrationScriptForChangeTwo.sql ... The process to spin up a database is to then run all the Initlal scripts, and then run the sequential Migration scripts. A tool takes case of the versioning requirements, etc. My question is, in this kind of setup, is it useful to also maintain this: Current/ Stored Procedures/ dbo.MyStoredProcedureCreateScript.sql ... Tables/ dbo.MyTableCreateScript.sql ... ... By "this" I mean a directory of scripts (separated by object type) that represents the create scripts for spinning up the current/latest version of the database. For some reason, I really like the idea, but I can't concretely justify it's need. Am I missing something? The advantages would be: For dev and source control, we would have the same object-per-file setup that we're used to For deployment, we can spin up a new DB instance to the latest version either by running the Initial+Migrate, or by running the scripts from Current/ For dev, we do not need a DB instance running in order to do development. We can do "offline" development on the Current/ folder. The disadvantages would be: For each change, we need to update the scripts in the Current/ folder, as well as create a Migration script (in the Migration/ folder) Thanks in advance for any input!

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• Best practice: git, github, lighthouse and 2 developers

  - by Alxandr

  I'm setting up a new project and plan on using git and github for sourcecontroll and hosting of repo and lighthouse for bugtracking. I've been working with git for some while now, but only been using it for more of a backup solution than collaborate coding solution. Also, I've noticed that in github you can setup a servicehook to lighthouse so that whenever you push to github it notifies lighthouse of the changes. This uses a token for user-authentication and has the ability to change tickets to resolved etc. However, this token I believe functions that way so that whenever a user pushes to the repo (dosn't matter who), it's the owner of the repo that "updates" to lighthouse. This is a problem. So, I believe it is necessary with 2 separate repos at github (one for each dev), and I'm wondering about the workflow that should be used. Any1 care to shred any light on this matter? Like when to pull and push (and where), and how to make the two github repos in sync or something like that? Or another solution to the problem altogether.

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• Storing a digital signature for bookings on a web based system

  - by Duncan

  I have a web based bookings system built for a UK higher education client to allow students to sign out equipment (laptops, camera's etc). It's been in use successfully for a couple of years, in the current workflow equipment is collected and the booking is printed, signed by the student and kept until the equipment is returned. They are emailed a pdf copy of the booking and reminders if equipment is outstanding. Students can login and prebook equipment using their university LDAP credentials, the booking is then authorised by staff for later collection, but can also walk in and have equipment booked out by staff. They would like to remove the signed paper part of the process and replace this with some sort of digital signature. The suggestion was a graphics tablet but with a web based system this would require a local software package and in my view be impractical. My thought is that students would enter their LDAP username and password upon collection of the equipment, verifying their identity and effectively digitally signing the booking. My question is what would be best to store as a signature or whether to simply authenticate the user and use a boolean flag to indicate that this has been done could be deemed sufficient?

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• Dynamic State Machine in Ruby? Do State Machines Have to be Classes?

  - by viatropos

  Question is, are state machines always defined statically (on classes)? Or is there a way for me to have it so each instance of the class with has it's own set of states? I'm checking out Stonepath for implementing a Task Engine. I don't really see the distinction between "states" and "tasks" in there, so I'm thinking I could just map a Task directly to a state. This would allow me to be able to define task-lists (or workflows) dynamically, without having to do things like: aasm_event :evaluate do transitions :to => :in_evaluation, :from => :pending end aasm_event :accept do transitions :to => :accepted, :from => :pending end aasm_event :reject do transitions :to => :rejected, :from => :pending end Instead, a WorkItem (the main workflow/task manager model), would just have many tasks. Then the tasks would work like states, so I could do something like this: aasm_initial_state :initial tasks.each do |task| aasm_state task.name.to_sym end previous_state = nil tasks.each do |tasks| aasm_event task.name.to_sym do transitions :to => "#{task.name}_phase".to_sym, :from => previous_state ? "#{task.name}_phase" : "initial" end previous_state = state end However, I can't do that with the aasm gem because those methods (aasm_state and aasm_event) are class methods, so every instance of the class with that state machine has the same states. I want it so a "WorkItem" or "TaskList" dynmically creates a sequence of states and transitions based on the tasks it has. This would allow me to dynamically define workflows and just have states map to tasks. Are state machines ever used like this?

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• FxCop hates my usage of MVVM

  - by Dave

  I've just started to work with FxCop to see how poorly my code does against its full set of rules. I'm starting off with the "Breaking" rules, and the first one I came across was CA2227, which basically says that you should make a collection property's setter readonly, so that you can't accidentally change the collection data. Since I'm using MVVM, I've found it very convenient to use an ObservableCollection with get/set properties because it makes my GUI updates easy and concise in the code-behind. However, I can also see what FxCop is complaining about. Another situation that I just ran into is with WF, where I need to set the parameters when creating the workflow, and I'd hate to have to write a wrapper class around the collection I'm using just to avoid this particular error message. For example, here's a sample runtime error message that I get when I make properties readonly: The activity 'MyWorkflow' has no public writable property named 'MyCollectionOfStuff' What are you opinions on this? I could either ignore this particular error, but that's probably not good because I could conceivably violate this rule elsewhere in the code where MVVM doesn't apply (model only code, for example). I think I could also change it from a property to a class with methods to manipulate the underlying collection, and then raise the necessary notification from the setter method. I'm a little confused... can anyone shed some light on this?

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• Publishing toolchain

  - by Marcelo de Moraes Serpa

  Hello all, I have a book project which I'd like to start sooner than later. This would follow an agile-like publishing workflow, i.e: publish early and often. It is meant to be self-publsihed by me and I'm not really looking to paper-publish it, even though we never know. If I weren't a geek, I'd probably have already started writting in Word or any other WYSIWYG tool and just export to PDF. However, we know it is not the best solution, and emacs rules my text-editing life, so, the output format should be as simple as possible and be text-based. I've thought about the following options: 1) Use orgmode and export to PDF; 2) Use markdown mode and export to PDF; 3) Use something similar to what the guys @ Pragmatic Progammers do: A XML + XSLT + LaTeX. More complex, but much more control over the style. Any other ideas / references ? I want to start writting as soon as possible. In fact, I already have a draft in an org-formatted file. However, I do want to have and use the full power of LaTex later on to format it the way I want and make it look fabulous :) Thanks in advance, Marcelo.

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• How do I create a C# .NET Web Service that Posts items to a users Facebook Wall?

  - by Jourdan

  I'm currently toying around with the Clarity .NET Facebook API but am finding certain situations with authentication to be kind of limiting. I keep going through the tutorials but always end up hitting a brick wall with what I want to do. Perhaps I just cannot do it? I want to make a Web Service that takes in the require credentials (APIKey, SecretKey, UsersId (or Session Key?) and whatever else I would need), and then do various tasks: Post to users wall, add events etc. The problem I am having is this: The current documentation, examples and support provide a way to do this within the context of a Web site. Within this context, the required "connect" popup can be initiated and allow the user to authenticate and and connect the application. From that point on the Web can go on with its business to do what it needs to do. If I close the browser and come back to the page, I have to push the connect button again. Except this time, since I was already logged into facebook, I don't have to go through the whole connection process. But still ... How do applications like Tweetdeck get around this? They seemingly have you connect once, when you install their application, and you don't have to do it again. I would assume that this same idea would have to applied towards making a web service because: You don't know what context the user is in when making the Web service call. The web service methods being called could be coming from a Windows Form app, or code behind in a workflow.

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• Cocoa memory management

  - by silvio

  At various points during my application's workflow, I need so show a view. That view is quite memory intensive, so I want it to be deallocated when it gets discarded by the user. So, I wrote the following code: - (MyView *)myView { if (myView != nil) return myView; myView = [[UIView alloc] initWithFrame:CGRectZero]; // allocate memory if necessary. // further init here return myView; } - (void)discardView { [myView discard]; // the discard methods puts the view offscreen. [myView release]; // free memory! } - (void)showView { view = [self myView]; // more code that puts the view onscreen. } Unfortunately, this methods only works the first time. Subsequent requests to put the view onscreen result in "message sent to deallocated instance" errors. Apparently, a deallocated instance isn't the same thing as nil. I thought about putting an additional line after [myView release] that reads myView = nil. However, that could result in errors (any calls to myView after that line would probably yield errors). So, how can I solve this problem?

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• Tools for Maintaining Branches in SVN

  - by Chris Conway

  My team uses SVN for source control. Recently, I've been working on a branch with occasional merges from the trunk and it's been a fairly annoying experience (cf. Joel Spolsky's "Subversion Story #1"), so I've been looking alternative ways to manage branches and merging. Given that a centralized SVN repository is non-negotiable, what I'd like is a set of tools that satisfy the following conditions. Complete revision history should be stored in SVN for both trunk and branches. Merging in either direction (and potentially criss-crossing) should be relatively painless. Merging history should be stored in SVN to the greatest extent possible. I've looked at both git-svn and bzr-svn and neither seems to be up to the job—basically, given the revision history they can export from the SVN repository, they can't seem to do any better a job handling merges than SVN can. For example, after cloning the repository with git, the revision history for my branch shows the original branch off of trunk, but git doesn't "see" any of the interim SVN merges as "native" merges—the revision history is one long line. As a result, any attempts to merge from trunk in git yield just as many conflicts as an SVN merge would. (Besides, the git-svn documentation explicitly warns against using git to merge between branches.) Is there a way to adjust my workflow to make git satisfy the above requirements? Maybe I just need tips or tricks (or a separate merging tool?) to help SVN be better at merging into branches?

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• How to best implement Version Control for Web Development?

  - by Adam Taylor

  Version control systems are obviously important in development projects but there use in web development projects appears to be more complex, what with the requirement of having a web server to run all but the simplest of web applications. With that in mind, I have looked around and discovered a few different methods of using version control in web development projects: Provide each developer with a virtual machine which is a replication of the development server and have the developer run their working copy of the application in the virtual machine. Have each developer use a sub domain on the development server, e.g. john.project.com and checkout their working copy of the app to the directories the sub domain points to. Use the version control system to checkout code, make a change, commit the code and then check it on the development server (which points to the head of the repository). I can see a drawback of 1 being the added time required to create the virtual machines and ensure that the virtual machines are kept insync with the development server (also the need(?) to continuously change the developers host file to point at the virtual machine not the development server). I can see 2 possibly being a problem if absolute URLs are used within the site unless there is an easy way to update the configuration to use the new subdomains as well. 3 is the easiest to set up but is rather primitive and it will presumably become quite tedious for a developer to keep checking in the code after every time change. How have the users of stackoverflow used version control with web development projects and which method/workflow was most effective. Please also include extra methods I haven't thought of / read about.

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• Applications on the Web/Cloud the way to go? over Desktop apps?

  - by jiewmeng

  i am currently a mainly web developer, but is quite attracted to the performance and great integration with the OS (eg. Windows 7, Jump Lists, Taskbar Thumbnails, etc) something like WPF/C# can provide to the user, improving workflow and productivity. privacy and performance seems like a major downside of web/cloud apps compared to desktop apps. applications on the cloud/web work on the go, increased popularity of smartphones/netbooks majority of users may not benefit as much from increased performance of desktop apps, eg. internet surfing, word processing, probably benefit more from decreased startup times, lower costs and data on the cloud desktop applications increased performance benefits power users like 3D rendering, HD video/photo editing, gamers (i wonder if such processing maybe offset to cloud processing) integration with OS increases productivity (maybe such features can be adapted to a web version? maybe with a local desktop app to work with Web App API) more control over privacy (maybe fixed by encryption?) local data access (esp. large files) guaranteed and fast (YouTube HD fast enough most of the time) work not affected by intermittent/slow/availability internet connections (i know this is changing tho) what do you think?

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• Cleanest RESTful design for purely "action" calls?

  - by Josh Handel

  Hello all, I am sticking my toe in the RESTful waters and I just can't find a "satisfactory" solution to how to handle truely "action" oriented calls on a RESTful service? My quandry can be broken down into two parts. 1) Transactional calls: I understand the idea of having an ActionTransactor that you get a resource too with a post, update the parameters and then commit with a PUT (as described all over the place and in the Orilly RESTful Web services book).. But I struggle with the idea of keeping URLs with states present for ever.. If we really honestly don't need to keep a transaction for ever can we kill the resource URI? do URIs need to be perminate or can they be transiant URIs that expire 2) Non transactional calls: these might be calls to perform some workflow that spans multiple resources but having a resource just doesn't make since.. An example might be to re-generating some calculated ans cached value like a large aggreget or re-indexing blog or some such "purely" action. Anyways, I'm curious about the communities thoughts on this... Thus far, I've read that Overloading Post is the cleanest way to handle part 2.. But there is an equal amount of argument against that approach as well. And (to me) its not self documenting which I though was one of the key design goals of RESTful APIs.

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