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• choosing the right RAID level for PostgresQL database

  - by Sergey

  Hi, I got an disk array appliance of 8 disks 1T each (UltraStor RS8IP4). It will be used solely by PostgresQL database and I am trying to choose the best RAID level for it. The most priority is for read performance since we operate large data sets (tables, indexes) and we do lots of searches/scans. With the old disks that we have now the most slowdowns happen on SELECTs. Fault tolerance is less important, it can be 1 or 2 disks. Space is the least important factor. Even 1T will be enough. Which RAID level would you recommend in this situation. The current options are 60, 50 and 10, but probably other options can be even better.

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• Django - Moving database from development to production servers

  - by Garfonzo

  I am working on a Django project with a MySQL backend. I'm curious about the best way to update a production server's database to reflect the changes made on the development server's database? When I develop now, I make some changes to a models.py file, then to a schemamigration using South. Sometimes I do several migrations across several apps within the main project folder before it's ready for the production database. This means that there are several migration files in the app/migrations/ folder created by South. So on the production server, how does one update the database to reflect all the changes made in development, without having any data loss?

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• linux ftp server with virtual users

  - by kjertil

  i know there are already similar questions for this matter but the answers doesn't really make much sense to anyone who is not really technically comfortable in Linux. I've already tried articles like these for example: http://howto.gumph.org/content/setup-virtual-users-and-directories-in-vsftpd/ with the result of accidently breaking the whole system. The problem is that, while there are several technical possibilities to set up virtual users with a FTP server, it is not as easy as managing for instance a Filezilla server on Windows. I've seen some Web based GUI's but most of them seems to be out of date. The different flavours of Linux and the large amount of different popular FTP servers also seems to make the matter more complicated. I guess my question is, is there a way, to set up virtual FTP users on Linux without the hastle of having to manually edit PAM, MYSQL and config files?

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• NFS Issues in Gnome

  - by Alex

  I mount NFSv4 export via /etc/fstab and mount and use the shared folder in nautilus. There are two issues: When I copy a large file (around 4 GB) to the NFS server, the progress bar rapidly goes to 2 GB and then basically stops moving. But the copy s still in progress - it is just not displayed well When I disconnect from the network without unmounting the nfs share, nautilus freezes. How can I work around that? /etc/export on the server /export/share 192.168.0.0/24(rw,sync,insecure,no_subtree_check,anonuid=1000,anongid=1000) /etc/fstab on the client: server:/share /mnt nfs4 soft,tcp

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• How can I automatically lower Spotify playback volume when my Video Editing program makes a sound?

  - by Mark Major

  I'd like to listen to Spotify while I am video editing. This is just casual listening - nothing to do with the editing work. How can I automatically fade out the volume of Spotify when my video editing program plays audio? I often need to hear the video editing audio without the distraction of Spotify playing over the top, but the video editing playback is too on/off/on/off to switch Spotify audio manually each time. Without background music, I get really sick of the repeated playback of the audio clips with only silence inbetween. I suppose what I needd is an app that monitors sound output from 'App A' and reduces the sound output from all others (Apps B, C, D, etc) when something is played.

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• Social Media Aggregator, Global Update via Powershell

  - by deanjmiller

  Does anyone know of a way to interface with a Social Media Aggregator using Powershell. For Instance, I would like to update my global status on digsby using Powershell. Digsby would then fan the message out to Facebook, Myspace, Twitter, Etc.. I am open to using any Social Media Aggregator that can do this.. Digsby, Seesmic, Ping.fm TweetDeek, etc.. If any of these programs have a com interface or something like it I'm sure who ever implements this first will have a large gain in users.

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• 2.5" SSD in a 3.5" desktop drive bay normal?

  - by Cory Petosky

  I'm a little out of touch with modern desktop builds, but I recently built a new machine anyway. I want to pick up a SSD for my I/O intensive apps (EverQuest 2 and Flash CS4 mostly), but I'm having trouble finding any in the 3.5" form factor. Is this expected, or do I fail at product search? And, if it is expected, do 2.5" SSDs come with an adapter to fit them in my desktop machine, or will I need to purchase one separately? And, finally, if I do need to purchase an adapter, are they pretty standard or are some better than others. General advice is most welcomed, though specific product recommendations in addition would be helpful!

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• Do I need to disable access to a publisher database when setting up SQL Server 2000 Transactional Re

  - by Kev

  I have a production database i.e. where there are constant updates and I've configured this to be published to another server using Transactional Replication. When I configure transactional replication I've been doing the following: disable access to the source database backup source DB then restore to subscription server configure replication re-enable DB access to our apps The problem with this approach is scheduling in downtime, having to suspend all the various timed scheduled tasks we run and shutting down access to our various applications that are dependant on this database. Can I just configure transactional replication without disabling access to the publishing database and the subscriber database will correctly catch up? i.e. are all the DML statements queued on the publisher and as soon as the subscriber is ready they are picked off and executed?

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• SFTP through proxy

  - by aerodynamic_props

  I have a large amount of data on scratch space at computer b that I want to get. In my network I cannot directly connect to computer b (ssh exits with "No route to host"); I must first connect to computer a, and then connect to computer b. I cannot move the data from the scratch space on computer b to computer a because of a disk quota that is imposed on me at computer a. How can I move the data from computer b to my computer in this situation?

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• Minimum size of a boot partition on debian

  - by zebonaut

  I'm setting up an old box with Debian. First etch (4.0), because this is the last version that still had boot floppies, then the box is to be upgraded to lenny (5.0) and squeeze (6.0). Therefore, I will end up having a a couple of different kernel versions in the boot partition. If I don't want to be wasteful and if I end up needing a separate boot partition, how large should it be? I've used 10 MB long ago, but that was woody, and only one kernel in the boot partition, and this seems to be too small for what I want to do now.

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• Caching static content from Adobe, Microsoft, etc

  - by Tim

  I'm currently running the Apple SUS on a Mac OS X Server in a small office environment. It works well for Apple updates, but I'm still stuck with either manually downloading and installing Adobe/Microsoft updates on each computer or running them through a Squid cache, with the blind faith that Squid will keep the files I actually want to stay cached. What is the best way to cache updates locally for applications like the Adobe Updater or Microsoft AutoUpdate? Ideally cached in such a way that I can tell which files I do or do not have cached. It would also be nice to be able to cache things for other software like Firefox and Sparkle-enabled apps, but these are usually small enough to ignore.

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• What is a good router linux distro and WHY?

  - by madmaze

  I have a rather large home network with many clients. Ive decided I want to build a Linux based router, I have an 1.6Ghz dual-core(atom) system kicking around which will be re-purposed. So ive looked at a bunch of specific router distros but cant decide. I have also looked into taking a Ubuntu server or FreeBSD install and adding needed packages. So question is, what is the best router-Linux or base Linux distro and why? resources appreciated.

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• Distribute Windows (XP or 7) as virtual appliance

  - by User32

  I'm looking at ways that may be possible to distribute a Microsoft Windows (e.g. 7) virtual appliance (such as VMWare image) pre-configured and installed with a large application of mine. Is this possible? If not, is it perhaps best to ask clients to perform a virtual appliance installation on their site and then install my application via a script of some sort? For these kinds of scenarios I see that open source OSes are heavily used, but in my case I cannot use Linux or any other open source OS due to some requirements.

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• How do I reset the $PATH variable on Mac OS X?

  - by Neil

  I've messed up my path variable, and now some apps that I run raise errors saying Command Not Found (error 127) for commands like 'date' and 'sleep'. These commands work fine when executed directly in the shell. I'm guessing this has something to do with a malformed $PATH variable, and need to know how to reset it. I've deleted the files ~/.bashrc , ~/.bash_profile, /etc/bash.bashrc, and ~/.bashrc and ~/.profile. What other files could hold my $PATH? Is there some simpler way to reset the Path than dig into the myriad files which could hold my path? Note, this path problem is only with my user. I made a test user on my system, and the path was fine, back to normal.

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• Powershell if statement not working - help!

  - by Dmart

  I have a batch file that takes a computer name as its argument and will install Java JRE on it remotely. Now, Im trying to run this Powershell script to repeatedly call the batch file and install Java on any system that it finds without the latest version. It seems to run error-free, but the statements inside the if code block never seem to run - even when the if conditional test evaluates to true. Can anyone look at this script and point out what I'm possibly missing? I'm using the Quest AD cmdlets, and BSOnPosh module. Thank you. get-qadcomputer -sizelimit 0 -name mypc* -searchroot 'OU=MyComputers,DC=MyDomain,DC=lcl'| test-host -property name |ForEach-Object -process { $targnm = $_.name $tststr=reg query "\\$targnm\HKLM\SOFTWARE\JavaSoft\Java Runtime Environment" /v Java6FamilyVersion if(-not ($tststr | select-string -SimpleMatch '1.6.0_20')) { $mssg="Updating to JRE 6u20 on $targnm" Out-Host $mssg Out-File -filepath c:\install_jre_log.txt -inputobject $mssg -Append cmd /c \\server\apps\java\installjreremote.cmd $targnm } else { $mssg ="JRE 6u20 found on $targnm" Out-Host $mssg Out-File -filepath c:\install_jre_log.txt -inputobject $mssg -Append } }

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• Shrinking physical volumes in LVM on a Linux Guest in ESXi 5.0

  - by Stew

  The problem: Linux guest (OpenSuse 12.1), with multiple virtual disks attached. 3 disks are in a logical volume, two of which are exactly 2TB. None of the disks are independent, and due to the backup software we use, cannot be independent. When the two 2TB virtual disks are "dependent", the snapshot fails stating that the file is too large for the datastore. When I put those two disks in independent mode, snapshots work fine (the other disk is 1.8TB). I have therefore concluded that even shrinking the two physical disks by 100GB should solve the problem, however I am having trouble conceptualizing how to go about getting those disks smaller without breaking the LVM entirely. The actual LV has 1.3TB free, so there is plenty of space to shrink with. What I need to accomplish: Deallocate 100GB from the two, 2TB virtual disks within the linux guest. Shrink the two virtual disks by 100GB within vsphere (not as complicated). Are there any vsphere/LVM gurus that can give me a clue?

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• How do I set the umask for files and directories created from the GUI in MacOS X Lion (10.7)?

  - by Avry

  I've set my umask in my .bashrc file to 007. Any files created on the command line after loading my bashrc file respects this setting. I want to be able to set the umask to 007 for any files created using non-command line apps. This document talks about setting the umask via launchd. And it kind of works. If I follow these directions I can change the default permissions on a GUI created file from rw-r--r-- to rw-rw---- but the directories still are not group writeable (i.e. I want them to be rwxrwx--- but they are rwxr-x--- instead) The analog on Linux would be /etc/login.defs as the place to set the umask. What do I change in order for the umask to be set properly (i.e. the way I want it)?

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• OS X Automator empty, blank or null value.

  - by Brian

  I have some data files mostly excel, word and pdf files most of the files have no extension on them. So they are missing the .doc .xls. This data needs to be used in a Windows environment now. I have created automator apps for each of the file types I want to add the ext onto. The problem is it also adds the extension to files that already have an extension. So data.xls becomes data.xls.xls I would like to figure a way to only add the extenion to the files without extension. How do I tell the finder filter that i only want it to return files without extensions. I see how to add a line to filter by extension but I don't know how to let it know I want only blank or null or files without any extensions. Thanks

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• Deleting entire lines in a text file based on a partial string match with Windows PowerShell

  - by Charles

  So I have several large text files I need to sort through, and remove all occurrences of lines which contain a given keyword. So basically, if I have these lines: This is not a test This is a test Maybe a test Definitely not a test And I run the script with 'not', I need to entirely delete lines 1 and 4. I've been trying with: PS C:\Users\Admin> (Get-Content "D:\Logs\co2.txt") | Foreach-Object {$_ -replace "3*Program*", ""} | Set-Content "D:\Logs\co2.txt" but it only replaces the 'Program' and not the entire line.

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• RDP connections keep dropping

  - by Shaul

  I have an odd problem on my notebook (HP Pavilion dv7). My Internet connection seems OK for the most part. But lately I've been having trouble with Remote Desktop connections. While I can connect to remote computers, the connection is very flaky, and usually drops after a few seconds. Sometimes it'll successfully reconnect automatically, and sometimes not. But even after successful reconnection, it'll just drop again after a few seconds. This appears to be independent of which RDP host I'm connecting to, and which network I'm connected to locally, whether wireless or wired. Other remote control apps like TeamViewer and Ammyy seem to work fine. Any ideas?

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• Intel HD 4000 and Nvidia GT 650 working together on laptop

  - by Juan

  My new win7 Acer notebook has i5 CPU with Intel HD 4000 and Nvida GT650 GPU. Obviously monitor is plugged to Intel HD. In Nvidia control panel I can configure PhysX but that doesn't help. Windows system rating shows high gaming experience and average/low windows aero experience. What does that mean? Does my laptop use nvidia for games/3d apps nad Intel HD 4000 for aero? Should I disable Intel HD in bios, but how to plug monitor to nvidia? Or should I leave everything like now because everything works as it suppose to work? Here is image capture of some states: http://oi47.tinypic.com/34p0qp4.jpg

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• Multi-Document TOC showing in wrong order

  - by Jeremy DeStefano

  I had a large document that was having formatting issues, so I split it into 2 files. Chapters 1-7 are in the main doc with the TOC and a second doc has chapters 8-12. I have the following: {TOC \O "1-3" \H \Z \U} {RD \f "MCDPS Training Manual Part2.docx"} The TOC is created and has entries from both documents, however its showing the entries from Chapter 8-11 first and then Chapter 1-7. I've read that it should list them based on page numbers, but its not. Chapter 8 starts at page 121, yet its listing it first. How can I get it to show the TOC from the main doc first and then the RD?

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• ASA Slow IPSec Performance

  - by Brent

  I have a IPSec link between two sites over ASA 5520s running 8.4(3) and I am getting extremly poor performance when traffic passes over the VPN. CPU on the device is 13%, Memory at 408 MB, and active VPN sessions 2 so the load on the device is particularly low. Screenshot of wireshark file transfer between the two hosts over the VPN: The large amount of Header checksum failures is alarming, but I am not sure what to check now. I perf is showing around 4-5 Mbit/sec with differing TCP window sizes. Show Run on the ASA http://pastebin.com/uKM4Jh76 Show cry accelerator stats http://pastebin.com/xQahnqK3

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• Why are applications slowing down on the computer's second monitor?

  - by ChristianLinnell

  Here's an interesting one. Problem I have a user on Windows XP who is running a web application inside IE8. She has two monitors plugged in via DVI cables. When she is working the the browser on her primary monitor, everything is fine, but when she drags the window over to the second monitor, the web applications functionality grinds to a halt. It's not just web apps either - many applications exhibit the problem. What I've tried Switching the two monitors in the OS. It's obviously not the monitor's fault. Confirmed that it's the app slowing down, and not the graphical rendering. The application in question actually locks up. The mouse is unaffected, and I can drag other windows on top of the problematic application. Any ideas?

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• Increasing load capacity for growing website

  - by markxi

  My website currently runs on a dedicated web server (with LiteSpeed) and dedicated MySQL database server. It's a download based site with a lot of user-generated content, which can be streamed and downloaded, there are also thousands of thumbnails and static content. I'm at the stage where the web server can no longer handle the amount of traffic, so I'm looking a how best to increase capacity considering the large amount of downloadable content. My host suggests mirroring everything on a second web server and distributing the load between them using either DNS Made Easy, or to have my own load balancer (using ldirector) in front of the two web servers. Could anyone advise whether the above method would be the best option? Does any one have any experience with DNS Made Easy and/or ldirector? I'd appreciate any help.

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