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• Server Performance

  - by Burt

  We have a dedicated server that we use to stage websites (our test server). The performance of the server has become really bad and we regularly have to restart it. When performance is poor I have checked task manager for the processes and memory but everything looks OK. We use a content management system and it is always when using the admin section of this CMS that we notice the performance degrade which makes me think it may have something to do with DB calls the CMS is making. Does this sound viable? Any other sggestions of how I can go about testing this? Thanks in advance...

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• Analyze a wireless network that constantly drops/has speed issues

  - by Eddie Parker

  Hello, I'm curious what the best tools are to use for analyzing problems with a WiFi network. Here's the scenario: I have a WiFi router (Belkin N+) that's setup in AP mode. I have three RT-N13U's that I've purchased to use as 'repeaters', but I've had so many problems when more than one of them is running (bad routes) that I've only got one active. Sometimes certain boxes on my network can't talk to others, and drops are quite frequent and quite aggravating. I'm running Mac, Windows, and Linux (Gentoo) boxes on this network, so any software, or steps I should take that work for any of those boxes should be sufficient. Apologies if this is answered somewhere else - I'll close it as a dupe if so.

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• Is there a BitTorrent client that can download files "in sequence"?

  - by Bob M

  Is there a BitTorrent client that can download files "in sequence"? For example, download clip 01.avi (high priority) clip 02.avi (normal priority) clip 03.avi (low priority) clip 04.avi (low) clip 05.avi (low) then when clip 01.avi is done, it will automatically make it: clip 01.avi (high priority) clip 02.avi (high priority) clip 03.avi (normal priority) clip 04.avi (low priority) clip 05.avi (low) this can be useful when download *.rar as well, since download clip.rar, and then clip.r00, r01, r02, in sequence can allow previewing the file by using RAR to recompose the file (even though incomplete file, but will allow previewing). Update: will making all files active still considered a bad use of BT?

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• SQL Server Performance & Latching

  - by Colin

  I have a SQL server 2000 instance which runs several concurrent select statements on a group of 4 or 5 tables. Often the performance of the server during these queries becomes extremely diminished. The querys can take up to 10x as long as other runs of the same query, and it gets to the point where simple operations like getting the table list in object explorer or running sp_who can take several minutes. I've done my best to identify the cause of these issues, and the only performance metric which I've found to be off base is Average Latch Wait time. I've read that over 1 second wait time is bad, and mine ranges anywhere from 20 to 75 seconds under heavy use. So my question is, what could be the issue? Shouldn't SQL be able to handle multiple selects on a single table without losing so much performance? Can anyone suggest somewhere to go from here to investigate this problem? Thanks for the help.

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• Is a cluster the most cost effective redundancy method for windows server 2003?

  - by Ryan

  We had a server with bad ram which caused a long outage while they figured it out and our client facing apps had to go down for a while. We are coming up with a solution for instant fail-over but are not sure what the most cost effective method would be. Is a windows server cluster the best method for this? Also note we are using Parallels Virtuozzo if that makes any difference here. We found Parallels has a documented method for setting this up but it said it required a Domain Controller as well as a Fiber connection to shared storage, is all that really needed? Thanks.

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• I want to install an MSI twice

  - by don.vince

  I have a peculiar wish to install an msi twice on a machine. The purpose of the double install is to first install under the pre-production folder, run the deployment in a safe environment prior to deploying in the production folder. We typically use separate machines to represent these different environments however in this case I need to use the same box. The two scenarios I get are as follows: I've installed pre-production, I'm happy, I want to install production, I run the msi, it asks whether I want to repair or remove the installation I've production installed, I want to install the new version of the msi, it tells me I already have a version of the product installed and I must first un-install the current version The first scenario isn't too bad as we can at that point sensibly un-install and re-install under the production folder, but the second scenario is a pain as we don't want to un-install the live production deployment. Is there a setting I can give to msiexec that will allow this? Is there a more suitable different approach I could use?

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• How can I stop my laptop display from flickering when I connect my TV?

  - by Lord Torgamus

  I have a laptop with an HDMI output port running Vista, and an HDTV with HDMI input ports. The laptop is set to extend its desktop onto a second monitor. When I connect the computer to the TV with an HDMI cable, my laptop screen usually flickers rapidly. Most of the time it lasts for about 30 seconds, but sometimes it lasts for several minutes and once in a while it doesn't happen at all. It wouldn't be so bad except that the cursor moves back to the center of the laptop screen with each flicker, so I can't really do anything until the machine decides it's ready to calm down. I haven't been able to find any pattern at all for the causes or duration of the flickering. It doesn't seem to matter what programs the laptop is running when I connect it to the TV, whether I enable the extended display before or after I connect the TV or which HDMI port/cable I use. What could be causing this, and how can I make it go away?

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• How to Approach CentOS Back Up on GoDaddy Dedicated Hosting

  - by Scott

  Does anyone have any experience with backing up a dedicated server at GoDaddy or anywhere else? I have a CentOS system. I recently made a big newbie mistake working on linux and toasted my server. I had to start over from scratch b/c I damaged it so bad. GoDaddy says I need to handle it all myself b/c I am not paying them for back ups. Does anyone have any idea on how to approach this back up? I'm not sure how a backup on dedicated hosting would be different than a normal linux back up. In any case, I don't know how to do normal linux backups.

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• Alternative to Windows Home Server (WHS) backups

  - by Adam Tegen

  Since Microsoft announced the end of life for WHS, are there any alternatives? Specifically, I am interested in recovering from a catastrophic disk failure with WHS. For example, this is my ideal scenario when a desktop hard-drive fails (has a bad virus, etc): Install a disk of the same size or greater Boot the desktop with the Recovery Disc Point the recovery application at the WHS Pick the machine, the drive(s) and the date of the backup Have a couple beers Reboot to a working machine as if nothing happened. I would need to slap multiple disks in the machine without raid. It sounds like LVM will work here. It would be nice, but not required to have de-duplication of files when multiple machines are backed up. (Single Instance Storage)

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• Installing SSL certificate on JBoss

  - by Teddy

  I have a server that runs JBoss. When I type bad URL to that server it gives me version like this: JBossWeb/2.0.1.GA - what version of JBoss that would be? A SSL certificate will be bought and provided for me so that I could install it in JBoss. I would really appreciate any HOWTO or any information how to install ready SSL certificate on JBoss. Do I need to generate any files with openssl, when this SSL certificate will be bought from some other company that sells SSL certificates? Thanks in advance for any help.

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• Pros/cons to turning off cable modem

  - by Jay

  A little off the wall perhaps, but ... I have a cable modem and a router for a wireless home network. Is it a good or a bad idea to turn it off at night and during the day when we're all at work or school? Or should I leave it on 24/7. I was thinking that leaving it on constantly makes me more vulnerable to hackers, not to mention wasting electricity. (Though I'd guess the amount of electricity used by a cable modem and a router is probably pretty trivial. Still, every little bit helps.) When I have turned it off and turned it on again, it takes several minutes for it to go through its little dialog with the cable company and get me connected to the Internet again, which is annoying but not a big deal. Anyone know any good reasons one way or the other?

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• OpenLDAP Password Expiration with pwdReset=TRUE?

  - by jsight

  I have configured the ppolicy overlay for OpenLDAP to enable password policies. These things work: Password lockouts on too many failed attempts Password Change required once pwdReset=TRUE added to user entry Password Expirations If the account is locked out due to intrusion attempts (too many bad passwords) or time (expiration time hit), the account must be reset by an administrator. However, when the administrator sets pwdReset=TRUE in the profile, this seems to also override the expiration policy. So, the password that the administrator sent out (which should be a temporary password) ends up being valid permanently. Is there a way in OpenLDAP to have a password that must be changed, but also MUST expire?

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• IIS 7 + ASP.NET 4

  - by user26712

  Hello, I have an ASP.NET application that I am trying to convert to an ASP.NET 4 application. The application is fairly simple. I have created a new web application in IIS 7.5 pointing to the directory that the ASP.NET application exists in. When I attempt to execute the application, but entering http://localhost%3A%5Bport%5D into my browser, I receive the following error: Error Summary HTTP Error 500.21 - Internal Server Error Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list Most likely causes: * Managed handler is used; however, ASP.NET is not installed or is not installed completely. * There is a typographical error in the configuration for the handler module list.

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• Why is Latex so big?

  - by putmatrix

  On windows, MikTex comes in a DVD. It's several times bigger than a typical Linux distribution. This makes it impossible to carry Latex on a memory stick like I do with many other useful software. Why is it so big? I thought it was just a language or system, but I've never seen any programming language with gigabytes of libraries. It's just that there's a bad feeling when your Latex distribution takes up four gigabytes of space when you expect it to be more of, say, 200mb.

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• How to get monitor resolution of 1680x1050 using ATI Radeon HD 2600 PRO in a dual monitor setup

  - by pratikk

  I have Sapphire ATI Radeon HD 2600 PRO graphics card in my Windows Server 2008 x64 machine. It has two outputs a VGA and a DVI. I have connected the DVI to my Dell 24" monitor with 1900x1200 resolution and it works 100%. The VGA I have connected to my second monitor a Samsung 22" with native resolution of 1680x1050. But the ATI driver and Catalyst control centre doesn't show this resolution as an option. If I choose a lower resolution like 1280x1024 it looks really bad and fuzzy. I searched in google and downloaded the powerstrip tool that allowed me to create a custom resolution of 1680x1050 and then this option shows up in Catalyst control centre and my 2nd monitor works fine now. But I don't want to pay for an application to choose a display resolution. Why doesn't ATI show me that option by default even though it has no problem in actually supporting the display at resolution. Is there a way to get 1680x1050 resolution using ATI drivers only ?

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• RAID10 without write-back cache = horrible write performance?

  - by Harry Mexican

  I have just provisioned a dedicated server on singlehop. I'm running it through some tests to know what to expect performance-wise. On the I/O side (with 4 1TB disks in RAID 10) I get: write-cache disabled 200 MB/s read throughput 30 MB/s write throughput I thought that was really low compared to my desktop HD which gets 150-150 or so. So I had a chat with them and they suggested enabling the write cache. New results: write-cache enabled 280 MB/s read 260 MB/s write which is great and all but means I'd have to add a BBU for an additional monthly cost. Is it normal for the write throughput to be 1/4 of a regular drive on RAID10, if you don't have write cache? It almost feels like its intentionally bad to force you to pony up for the BBU. I'd be happy with normal non-raid performance of 150/150.

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• Windows Server 2003 R2 sp2 and Exchange 2003 - missing pop-up menu "Exchange Tasks"

  - by Denis

  I need to recover database. That's what i doing step-by-step: - In Exchange System Manager check the server - Create new Recovery Storage Group - Add Database to recover - Mount store for it Database (Mailbox Store) - all finish successful Next step - I need check user and in pop-up menu click on "Exchange Tasks...", but in menu i see only "Help". Main question - why I have not "Exchange Tasks" and how I can get it? But I can see "Exchange Tasks" in "First storage Group"-Mailbox-User. Sorry for my bad English. Thanks, Denis

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• MX records and CNAMEs

  - by sly

  I realize similar questions were asked/answered on this, but I have a subtle detail to which I can not find answers anywhere. Let's exemplify with the following DNS entries: foo.example.com A 1.1.1.1 bar.example.com A 1.1.1.2 wee.example.com CNAME foo.example.com foo.example.com MX foo.example.com.s9a1.psmtp.com bar.example.com MX bar.example.com.s9a1.psmtp.com Note the last line. My institution has that kind of MX records, where for each MX record the value has the label prepended. Question 1 is, what is the motivation for this (why not just s9a1.psmtp.com)? Question 2 is more subtle and follows.. My understanding is that an MX record should not contain any aliases for neither label nor the value, i.e. the following would be bad practice: wee.example.com MX wee.example.com.s9a1.psmtp.com Then, how should the RRs look for the alias wee.example.com? Thanks!

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• Horrible performing RAID

  - by Philip

  I have a small GlusterFS Cluster with two storage servers providing a replicated volume. Each server has 2 SAS disks for the OS and logs and 22 SATA disks for the actual data striped together as a RAID10 using MegaRAID SAS 9280-4i4e with this configuration: http://pastebin.com/2xj4401J Connected to this cluster are a few other servers with the native client running nginx to serve files stored on it in the order of 3-10MB. Right now a storage server has a outgoing bandwith of 300Mbit/s and the busy rate of the raid array is at 30-40%. There are also strange side-effects: Sometimes the io-latency skyrockets and there is no access possible on the raid for 10 seconds. The file system used is xfs and it has been tuned to match the raid stripe size. Does anyone have an idea what could be the reason for such a bad performing array? 22 Disks in a RAID10 should deliver way more throughput.

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• Does Dynamic DNS require separate subdomains?

  - by kce

  Hello. I have a functioning DHCP/DNS (ISC Bind 9.6, DHCP 3.1.1) server running on Debian that I would like to add DynamicDNS functionality to. I have a pretty simple question: Does DynamicDNS require (or recommend) separate sub-domains? I have seen a few tutorials where the the clients that are acquiring their IP addresses and other networking information via DHCP are on a different sub-domain as the servers which are statically configured (both in terms of IP, and DNS). For example: All the clients are on ws.example.org and the servers on example.org. Right now all of our servers and clients are in the same domain (example.org) but spread across different zone files (because we have multiple subnets). The clients are configured with DHCP and the servers are configured statically. If I want to setup DynamicDNS for the clients should I use a separate sub-domain? What's the best practice here (and why or why not would it be a bad idea to do otherwise)? Thanks.

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• What could cause Vista machines to degrade in performance?

  - by gencha

  We have installed several machines running Windows Vista at a client site. These machines run the same set of applications each day and are not operated with by any user. They mainly run a 3D application for digital signage purposes. After a few months I noticed that several machines suffer from really bad stuttering. The performance is unacceptable. At first I figured it was faulty hardware. But after putting a fresh image on them, they run perfectly fine again. These are Core i7 machines with GTX 280 graphics adapters. They should be able to handle the workload without any trouble (and they do, at least for a while). I really have no idea how to track down the source of this issue. Especially since not all of the machines display the same issue.

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• How to install Oracle's exp / imp binaries

  - by Sotapanna

  I was browsing the net to find a solution, but I had no luck. :( How can I install Oracle's imp / exp binaries to my CentOS box without installing an Oracle Server? I'm accessing an existing Oracle database on another machine, so I only need a client here. I already installed sqlplus and its dependencies (oracle-instantclient11.2-basic-11.2.0.3.0-1.x86_64.rpm, and oracle-instantclient11.2-odbc-11.2.0.3.0-1.x86_64.rpm), but that didn't provide those tools. Do I really need to fully install Oracle? My aim is to suck a database dump from the Oracle to my CentOS box. If there is another way to do this without using exp I wouldn't feel bad about NOT using it, but it seems to me there is no alternative.

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• Mac Disk-Utility input/output error

  - by Michelle

  a couple of other people have posted about this but my specific problem has not been addressed. For months I have been backing up DVDs and home movies with no problem then all of a sudden I get an "input/output" error. Yes I have cleaned the disks. Actually I have tried 8 different ones - they are not all bad so its obviously my computer. I have done a scan and cleaned up the HD a bit just in case but nothing is helping. I don't want to download other programs since this one works but seems to be having a problem. Any ideas?

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• Migrated from Exchange 2003 to Exchange 2007 - remove old 03 computer account?

  - by TheCleaner

  Migrated from Exchange 2003 to 2007 back in February of this year. I've still got the old exchange computer account in AD. Can I simply delete the computer account or will bad things start happening? I've looked in the Exchange 07 console and don't see the old server listed at all. HOWEVER: we do still have an old CNAME for this old Exchange server pointing to the new one for a few old clients that still have their mail server set to the old name...if that matters at all. I ran "get-exchangeserver" on the new server and the old one isn't listed at all.

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• Prevent Server Restart after Windows Updates

  - by eidylon

  we have a number of servers in our office, as a small hosting company, and these servers are critical to business, ... web server, mail server, db server, etc. On a semi-regular basis, when the machines get automatic updates, they just automagically reboot themselves in the middle of the night. A number of them have software which must be running on the console session (bad practice, I know, but out of my control). When they reboot themselves, these programs obviously shut down, leaving customers upset and services interrupted. How do you set a Windows Server 2003 R2 machine to NEVER automagically reboot itself after updates? And perhaps, if possible, to instead email someone so that they are aware it needs a pending reboot and can schedule it for the best time? Thanks in advance!

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