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  • What configuration changes can I make to speed up extremely slow Windows VM's in ESXi 4.0.

    - by Shawn Anderson
    I've recently moved from VMWare Server to ESXi 4.0. Running on Dell T310. My VM's have been restored but they are running dog slow compared to VMWare Server. I loaded ESXi 4.0 using only default values. Where are some areas where I can tweak the performance? Even logging onto the VM's can be extremely sluggish. Trying to install software on any of them is a new experience in pain. Dell PowerEdge T310 Xeon X3460 2.80 GHz 32 GB RAM 1 HD (2 TB) I have 16 VM's on this server, but only six or so will be running during my testing. I keep an eye on the Resource Allocation and Performance tabs for the host and I never see CPU or RAM getting anywhere close to pegged. Events tab does show some notices for video RAM issues and some hints on Windows activation issues, but nothing that would point to the sort of sluggishness that I'm experiencing. 1 Windows Server 2008 R2 (64-bit) - 4 GB RAM 1 Windows 7 (32-bit) - 2 GB RAM 1 Vista (32-bit) - 1 GB RAM 3 XP (32-bit) - 1 GB RAM Over to you! Thanks - Shawn

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  • How well will ntpd work when the latency is highly variable?

    - by JP Anderson
    I have an application where we are using some non-standard networking equipment (cannot be changed) that goes into a dormant state between traffic bursts. The network latency is very high for the first packet since it's essentially waking the system, waiting for it to reconnect, and then making the first round-trip. Subsequent messages (provided they are within the next minute or so) are much faster, but still highly-latent. A typical set of pings will look like 2500ms, 900ms, 880ms, 885ms, 900ms, 890ms, etc. Given that NTP uses several round trips before computing the offset, how well can I expect ntpd to work over this kind of link? Will the initially slow first round trip be ignored based on the much different (and faster) following messages to/from the ntp server? Thanks and Regards.

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  • nginx - Redirect specific page paths to https while keeping everything else on http (in a single server call)?

    - by Kris Anderson
    From what I've gathered so far it's clear that running if statements in nginx should be avoided at all costs. Most of the examples I've found so far regarding specific page redirects involve multiple servers being used. But, isn't that a bit wasteful? I'm not sure, but I would think multiple servers to accomplish this would be somewhat slower then a single server when under heavy load. My current server call is this: server { listen 10.0.0.60:80; listen 10.0.0.60:443 default ssl; #other code } What I want to do is redirect certain http requests to https requests. For example, I want /login/ and /my-account/ to always be forced to use SSL. If you're on /help/ though, I want that served over the default http. Is there a way to accomplish this within a single server call? Or is there no downside to using 2 server calls to get this working? nginx seems to be under pretty active development and a lot of the older guides I've followed were from times when you couldn't listen to requests for port 80 and 443 within the same server call. But now that nginx has been updated to support that (I'm running 1.2.4), I'm wondering if there's a "best practice" way of handling this today. Any help would be greatly appreciated. EDIT: I did find this guide: http://redant.com.au/blog/manage-ssl-redirection-in-nginx-using-maps-and-save-the-universe/ and I updated my code as follows: map $uri $my_preferred_proto { default "http"; ~^/#/user/login "https"; } server { listen 10.0.0.60:80; ## listen for ipv4; this line is default and implied listen 10.0.0.60:443 default ssl; if ($my_preferred_proto = "none") { set $my_preferred_proto $scheme; } if ($my_preferred_proto != $scheme) { return 301 $my_preferred_proto://mysite.com$request_uri; } It's not working though. When I change the default to https everything is redirected to SSL so it does somewhat work. But the redirect of /#/user/login is not redirecting to HTTPS. Any ideas? Also, is this a good way to go about this?

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  • How to create a readonly root linux: Can be mounted as writeable for persistent changes?

    - by Mr Anderson
    I'd like a read only file system that runs almost entirely in RAM but the compact flash or hardrive can be mounted and made writeable to make persistent changes. How do I do this on Linux? I've looked at several tutorials but none really explain how to create such a system with the option of being able to mount the storage device and make persistent changes. I looked at this so far: http://chschneider.eu/linux/thin_client/ I also looked on the old gentoo wiki but the article was very specific to Gentoo. I'll be using a debian based Linux but it would be nice I've someone could explain to me how to do this in pretty generic instructions ,that would work on any Linux distro. Thanks.

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  • Green System Administrator looking for helpful tips

    - by Joshua Anderson
    I have just been promoted to Systems Administrator for our product. We are designing a application that communicates with the cloud(Amazon EC2). I will be in charge of maintaining all Instances and their underlying components. So far this involves a set of load balanced services instances that connect to a central DB in a multi-tennant DB design. Im interested in what other Sys. Admins have discovered as invaluable tools or practices. Any resources provided will be greatly appreciated.

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  • SQL Server Express 2005 cannot connect

    - by jp
    hi all, I have a SQL Server Express 2005 install on a godaddy virtual terminal which currently is only connected to(locally with mgt studio) every few days or so. Every time i try to connect I get a cannot connect to SQL Server error and after a restart it I can connect just fine locally. I was wondering if there is a timeout setting or something that I am missing that I need to change so that if it is not connected to for a while it does not required a restart? any ideas? thanks!

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  • Network share not always available on Windows 2003

    - by JP Hellemons
    Hello everybody, we have a windows 2003 server with a shared directory/folder. I've seen this thread but this wasn't any help: http://superuser.com/questions/58890/the-specified-network-name-is-no-longer-available I have a ping -t running from 3 pc's (vista and two windows 7) they all work. the problem occurss when two users enter the network share then this 'network share is no longer available' appears and the explorer windows turn white. after f5 or refresh the shared directory is back. this is really strange. there is no anti virus or kasparsky running on either end. this is all in the same LAN. the internet connection is really stable, so it's really strange. because a stable internet connection should imply that the local network connection is also stable and that this is a windows issue. can it be a router issue? I have checked the eventlog on the server for diskfailure related messages, but there are none. EDIT: can this be related to mapping a shared directory to a drive letter? and that there is a router between me and the mapped network drive? or is it just windows that is not working well with two users on the same shared folder? should I install samba or something?

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  • Can I cancel a resize operation in GParted without causing data loss?

    - by Anderson Green
    I'm currently waiting for GParted to finish resizing a partition, but the progress bar is currently at 0, and it's been taking much longer than usual (perhaps an hour). Is it safe to cancel the resize operation? I don't want to wait days for the resize operation to complete, but I don't want to lose all of my files either. (Is there any way that I can simply pause the resize operation, attempt to recover files, and then resume the resize operation?) (An update: the operation has finally completed, and my files are still intact!)

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  • Sandboxie or VHD for virtual environment?

    - by lucian.jp
    I am looking for advices about creating virtual development environment. Is it better to have a base VHD file with differential VHD for stable development environment and another differential VHD file for beta development environment or should I install Sandboxie 64-bit and install both environment in different sandbox? I am concern about windows services and shortcuts with the sandbox. Current OS : Windows 7 64-bit

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  • How to troubleshoot Hyper-V VSS writer causing backup failure on Server 2008 R2

    - by Tim Anderson
    I have a Windows Server 2008 R2 machine running Hyper-V. Backups using Windows Server Backup fail with the error: The backup operation that started at '?2011?-?01?-?02T10:37:01.230000000Z' has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '2155348129'. Please review the event details for a solution, and then rerun the backup operation once the issue is resolved. I have traced this to a problem with the Hyper-V VSS writer. vssadmin list writers reports: Writer name: 'Microsoft Hyper-V VSS Writer' Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de} Writer Instance Id: {fcf0dd79-d282-4465-88ae-7b6857e055c2} State: [8] Failed Last error: Inconsistent shadow copy However I can't get any further. A few relevant facts: I get the error even if all the VMs are shut down If I disable the Hyper-V VSS Writer by stopping the Hyper-V Management Service backup completes OK There are no errors in the Hyper-V-VMMS application log I tried to set tracing for VSS but can't get any output for some reason. I set the correct registry entries but no trace log is generated. Tim

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  • Setup a new domain controller over a temporary VPN, but now Windows delays startup?

    - by Kris Anderson
    I'm migrating servers from colo locations to Amazon's VPC EC2 instances. If anyone hasn't worked with Amazon VPC before, VPN is a pain in the arse! Anyways, I setup a new server that acts as the domain controller for our Amazon VPC. In order to migrate all the user accounts from our existing domain controllers I manually connected to our colo VPN using my user account on the new Amazon EC2 machine. I was able to join the domain and the new Amazon server became another domain controller on our network. So far so good. The problem I'm having is that when booting the EC2 domain controller (which is no longer connected to the VPN so it can't communicate with the existing controllers), it takes a good 6-8 minuted before I can remote into the server (instead of the 1-2 minutes it should take). Also, during this time most of the services we also run (like IIS) also give 404 errors until the 6-8 minutes have passed. It's almost like the domain controller is attempting to reach the other domain controllers first and after 6-8 minutes it falls back to the one located on the local machine? I don't think that's what's happening though, because Server 2008 R2 doesn't have primary and backup domain controllers. They're all equal as far as Windows is concerned. For my network adapter I have only one DNS listed, 127.0.0.1, so it should be looking up the local domain controller and not the other domain controllers it connected to over VPN when VPN was enabled. In the server logs I'm seeing these warnings pop up during a reboot: The winlogon notification subscriber is taking long time to handle the notification event (CreateSession). The winlogon notification subscriber took 409 second(s) to handle the notification event (CreateSession). Any ideas on what's happening here? I would try removing the existing domain controllers from the new Amazon EC2 machine, but I still need to connect over VPN a few times to migrate some data between the servers, and I don't want that change being reflected back to the other domain controllers in our colo locations.

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  • How to backup/restore OSX Parental Controls before/after complete reimage?

    - by Jim Anderson
    We typically "nuke and pave" users Mac OSX laptops if they have software issue. Prior to doing so, we backup the primary (non-admin) user's home folder. Our standard image has four accounts: Admin (uber admin user); Parent (admin account for the parents of students); Loaner (so our standard image will also work for our loaner laptop pool); Student (this is the primary, non-admin user of the laptop) Our standard image has only minimal Parental controls on the Loaner and Student accounts. Some parents choose to tighten the parental controls. We never know when parents have made changes to parental controls, or what those changes are. Once we have reimaged the machine with our standard image (minimal parental controls) we would like to be able to restore any custom parental controls parents may have placed on their student's account. Any help in this would be appreciated. Thanks.

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  • MSSQL Auditing Recomendations

    - by Josh Anderson
    As an aspiring DBA, I have recently been asssigned the task of implementing the tracking of all data changes in the database for a peice of software we are developing. After playing with microsoft's change data capture methods, Im looking into some other solutions. We are planing to distribute our product as a hosted solution and unlimited installations would be desired for maximum scalability. Ive looked at IBM's Guardium as well as DB Audit by SoftTree. Im curious if anyone has any solutions they may have used in the past or possibly any suggestions or methods to achieve complete, and of course cost effective, auditing of data changes.

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  • Add shortcut SQL management studio 2008 to select top 1000 order by PK desc

    - by JP Hellemons
    Hello, when I right click a table I can select select top 1000 rows and edit top 200 rows I'd like to add an option select bottom 1000 rows I am pretty sure that I've seen it somewhere online how to do this. But I can't remember where... already found this: http://sqlserver-training.com/how-to-change-default-value-of-select-or-edit-top-rows-in-ssms-2008/- but it seems impossible to add a template query...

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  • What is the harm in giving developers read access to application server application event logs?

    - by Jim Anderson
    I am a developer working on an ASP.NET application. The application writes logging messages to the Windows event log - a custom application log just for this application. However, I do not have any access to testing or staging web/application servers. I thought an admin could just give me read access to this event log to help in debugging problems (currently a service that is working in dev is not working in test environment and I have no idea why) but that is against my client's (I'm a consultant) policy. I feel silly to keep asking an admin to look at the event log for me. What is the harm in giving developers read access to application server application event logs? Is there a different method of application logging that sysadmins prefer programmers use? Surely, admins don't want to be fetching logging messages for developers all the time.

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  • HD failure questions ...

    - by JP
    I recently had one of my home PC hard drives fail. It was in a striped raid, so I had to rebuild the raid (no data lost, only the OS partition was there). Is there any way to diagnose exactly what went wrong with the drive? That is what caused the failure? Also, in general, what is a good way to dispose of a failed hard drive securely and realistically (I don't have thermite or muriatic acid)?

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  • Fax in Small Business Server 2003 fails to hang up

    - by Tim Anderson
    We have a problem with fax in SBS 2003. External modem, Courier v Everything which is a recommended model. It receives a fax OK, but then sometimes (quite often) fails to hang up. Attempts to send faxes thereafter get an engaged tone. The only fix when this happens is to reset the fax modem. Even restarting the server is not enough. We've tried with a different model modem, same problem. Any ideas? Tim

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  • Accessing multiple local HD's or RAID with ESXi 4.0

    - by Shawn Anderson
    How to I get additional HD's to be recognized and used by ESXi 4.0. When I purchased my system I had two 2TB HD's, but when I installed ESXi it only recognized one of them. I'm happy to get whatever number of drives that I need (I have a four bay SATA in my Dell T310). What are some options? RAID? If so, is it supported. I guess I would need hardware instead of software since ESXi is so small. The VMWare forums (where I've lived for the last two days) are a charlie foxtrot of outdated and conflicting info. I want to utilize my T310, with 32 GB RAM, 2.8GHz quad core to run many lab Windows VM's. I don't need production level availability but I do want decent performance, even though it's in a lab environment. A huge thanks to Jim B., Zypher, Helvick, and Jeff Hengesbach who posted answers to my earlier predecessor question on why ESXi was so sluggish.

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  • Barcode scanner work in browser

    - by JP Hellemons
    I have a Manhattan Barcode scanner Contact CCD Handheld 80mm scan width, USB. I have connected it to Windows 7 x64. I managed to get it to scan several barcodes by configuring it to USB Mode. If I open up Notepad it scans and displays the barcodes correctly. But when I set the cursor in a textbox in my browser (IE9 beta, Firefox 3.6 or Chrome 8.0 beta), it scans correctly but opens the download dialog afterwards. This gets triggered by CTRL+J normally.... What did I do wrong? I tried several barcodes (Code128 and several others) and tried different browsers and Notepad. it works in Notepad but doesn't in the browsers...

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  • Is there a performance difference between Cat5 and Cat6 keystone blocks?

    - by Scott Anderson
    I'm going to be wiring my home for ethernet soon, and I've already decided that I want to use Cat6 cable to do it (faster speeds, better performance, etc). During the installation, I'd like to add wall-plates to certain rooms in my house, and the keystone blocks look like the best option for me. My question is: I've seen different keystone blocks on many cabling websites, some say Cat5e and some say Cat6. The Cat6 ones are slightly more expensive. Is there any noticeable performance gain from using a Cat6 keystone? To me, it just seems like the keystone really wouldn't matter, since it's basically like putting an RJ-45 end on a cable. Can I buy the cheaper Cat5e keystone blocks and still have the performance that Cat6 cable will give me? Thanks!

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  • Clean URLS with mod rewrite and URL Encoded characters causes 404?

    - by Richard JP Le Guen
    I have a web site using mod_rewrite to get some clean urls and custom 404 pages. My .htaccess file looks like this: <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ index.php?clean_url=$1 [QSA,L] </IfModule> What puzzles me is that if the URL contains a %2F (url-encoded /) the server seems to force a 404. As an example, http://example.com/category/article would be a normal article, but then http://example.com/category%2farticle gives a server-generated 404 page. (not the custom 404 page) I wouldn't have expected this... why this is happening? Is there a way around it?

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  • Hardware issue, bsod with windows xp irq and strange messages with ubuntu

    - by JP Hellemons
    I have an old Acer T160 and it used to run Windows XP. But I keep getting random BSOD's. I keep seeing IRQ conflicts. I tried to run ubuntu, which runs and keeps running. But sometimes is not responding. Also there are these popups at ubuntu 12.04 that my network cable (which is onboard) is unplugged. But I have no cable in it! and have an usb dongle for wifi. which also seems unstable. have to (auto)reconnect sometimes. So my question is: is it my mobo, power supply or something else? FYI: I had an dvd-rw station which did not open properly, so unplugged the ata and power, als removed the second harddrive. now only have sata harddrive. also removed the extra video card (ati sapphire x1600 pro) so use only onboard video now and still have these issues. EDIT Update: will try with a new PSU (power supply unit of 400watt) the old (factory) one was 300watt. and will use a usb drive which has 12.04 ubuntu on it (made with unetbootin) to format everything and re-install ubuntu. (so also delete mbr partition) will update the day after tomorrow.

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  • Bash script getting automatically deleted from Ubuntu 12.04 Server?

    - by Kris Anderson
    I'm running a bash script on an ubuntu 12.04 through cron. The script works fine for a few weeks (runs daily backups of websites, mysql databases, and copies to Amazon S3). However, twice now I've noticed that backups stopped happening. Both times the backup script (backupscript.sh) located in my home folder was no longer there. No one else has access to this server, so nothing was manually changed on the server and no one deleted the file by mistake. The cron job (nano /etc/crontab) still references this script, but the script itself disappears. What could cause this to happen? Does Ubuntu delete the script if it runs into some sort of error?

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  • URIs for QuickTime X

    - by JP
    Apple lets you Stream video over HTTP with their new tech, but is there a URI scheme to open the .m3u8 files from a browser in Quicktime X? (ie. Open as a URL, rather than downloading and attempting to play the local file)

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