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• VGA passthrough and desktop virtualization

  - by Zacariaz

  In short, my dream is to have one machine with multiple paravirtualized desktop and server guests, one of which has to be a Windows desktop with powerful graphics. As Windows can't be paravirtualized in the normal sense of the word, I was quite happy when I heard about VGA passthrough, but then I read on. As I understand it, such a setup would mean that the Graphics will be dedicated to one particular guest, thus you wouldn't be able to switch between guests. If this is in fact so, would someone please explain to me what the purpose/use of VGA passthrough is? I can think of no real use for it. Yes it's a cool technology, but to me it seems pointless. It's true that it's possible to passthrough individual VMs to separate GPUs, which is also cool, but in the end I should think that two seperate computers would make life a whole lot simpler. Again it seems rather pointless.

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• Windows HOSTS File

  - by jdp

  I have a network of computers and a server. I often need to edit the hosts file of all the computers to add a new entry or to change one. e.g. 192.168.1.101 temporary-internal-site How can I get all the machines (all windows) to 'import' or use a hosts file on a server in addition to the normal one. This means that I can just edit this one file with the new entry and all the machines will check it. Feel free to ask questions if you don't understand.

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• XP Clients can't copy to networkshare

  - by chewbacca76

  i have a windows 2003 domain where i have strange problem. One of our file shares is on a 2003r2 domain controller, xp clients trying to copy files on the share are always getting the error error copying file or folder filename could not be copied. path too long while windows 7 clients work fine. Nothing unusal is found in the eventlog on both the server and the client. It doesn't matter if i access the share by fqdn or ip, the path is including filename shorter than 20 characters i.e. \path\share\file.txt Copying files to other servers is fine. Reading from the shares is ok too. Happened from one day to the other, one windows update that was installed this day (kb2736233) was removed but nothing changed. thanks for any tips

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• OS Isolation: Virtualization or Dual-Boot Duplication, a General How To?

  - by Mr_CryptoPrime

  I want to isolate my windows 7 operating system and I have looked into virtualization. This should work with Linux, however, I do want to still have a way to run windows 7 securely, but without significant performance loss, thus eliminating virtualization for that. I know that you can dual boot because I currently do so with my XP/Linux system. Is there a way that I can duplicate my windows 7 system so I can select one at bootup? This way I can ensure that each OS is isolated and not worry about performance loss. However, I am having a lot of trouble finding a solid method for OS duplication?! Is this even possible or must I buy two versions of win7 and somehow install them separately? Any information regarding this would be helpful, thanks! Essentially I want, Two instances of win7 (not necessarily simultaneously running) Each are isolated from one another so that a security breach in one doesn't affect the other. There is no performance loss in either from doing so

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• Enterprise Data Center System Admin/Engineer to Server Ratio

  - by Bob

  I know there have been similar questions asked over the last few months however looking at a Data Center Operations and know there are some really smart people out there that might be able to help. Looking for some staffing best practices based on first hand experience and was hoping that there is some experience in this area that can provide "best practice" application: Three High Availability (99.99% plus) Enterprise Level Data Centers geographically dislocated, one manned 24x7x365, one lights out, one co-location running HOT-HOT-HOT supporting a global community. More than 2,000 operating systems consisting of 95% Windows, 5% Linux and Solaris, 45% virtualized, more than 100TB storage. No desktop support, no Network Administration (administrated separately), running N+1 and serving more than 250 Billion page views annually. Based on experience what has been your experience with Server to "Data Center System Administrator/Engineer" ratio? Thanks in advance for your responses.

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• Twisted pair cable twists and unwanted signals issue

  - by ziaharipur

  I am confused about one point I have read the following paragraph from the networking book. “the twists in the twisted pair cable are used to avoid the unwanted signals. For example one twist, one wire is closer to the noise source and the other is farther; in the next twist the reverse is true. Twisting makes its probable that both wires are equally affected by the unwanted signal. This means that the receiver which calculate the difference between the two receives no unwanted signal.” Now ok I understood the purpose of twists but I am confused about how receiver will calculate the difference when it will receive the signal?. How unwanted signal will be eliminated ? Another thing that I want to make clear is , I am beginner please provide such an answer that can be understood.

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• Openvpn client-to-client connection reencrypted at Server?

  - by user1684411

  currently i'm using a site-2-site openvpn setup. The routers en/decrypt all traffic that goes from one net to another. One of them is the Openvpn server. This works but performance is not as good as possible. I think the limiting factor is the cpu power of the router. Would it be better if i use client-to-client connections and access the fileserver in the one net from a pc in the other, because the openvpn-server does not have to decrypt the (whole) packets?

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• Simplest way to respawn configured number of instances of a specific process.

  - by Zwei Steinen

  So we have an app. which we wan to run multiple instance of it in linux. The number should be configurable. We also want that whenever one of the instance disappears, a new one is booted up. I was looking into C based programs, shell script, python script etc. but I was wondering what would be the most simple, easiest way to do it. Are there any tools out there? Can one simply use some linux built-in functionality? Linux distribution is Red Hat.

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• how to monitor traffic at port 53 (DNS)

  - by Registered User

  I am a bit confused with the abundant tcpdump tutorials on internet. I am having a few of the virtual machines running on a virtualization server.Where I am debugging a problem.Port 53 is the one in problem. I have a bridged setup where out of 4 LAN cards on the machine in question one is active and it is xen-br0 I want to check if there is any request coming on port 53 on the server by other machines on LAN in question. I also want to see if the guest operating systems on LAN or any other machine is sending traffic at port 53.Due to abundant messages being generated via tcpdump I am finding it difficult to grep the output at desired port. So how can I use it if some one can give an example that would be helpful. Thanks in advance.

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• Running Hyper-V and VMWare together

  - by Shiki

  I have two virtualization software on one of my laptops which is dedicated to Windows 8 development. A VMWare for generic virtualization and the Windows 8 like Hyper-V for the WP8 SDK. Unfortunately these softwares don't like each other. Is there a way to get them play along? The exact problem is that if I install the SDK, VMWare won't even update or run. There is only one way to make them work. Switch Hyper-V on and off. Which is one restart all the time.

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• Script to restart BlackBerry services

  - by ICTdesk.net

  Can somebody give me a script advice/example of how to restart services? I have to restart 17 services, but the first 4 services have to be in the right order and after the restart command is given to one of the services, the next one should be started when the previous one is finished. I know I can restart a service by net command, and I can build a delay by for example a ping command that repeats for an x amount of times, but I never know in advance how long it is going to take for a service to restart. Thanks, Kindest regards, Marcel

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• Multi server management

  - by user788721

  We are running a website that allow users to create their own content, then share it through an iframe. We would like to get more servers to host the user content, and the main one for our website. Each user has a link like xxxx.com/content989856, xxxx.com/content45454545 We were thinking of two options : using a htaccess on the main server that will redirect to the good server but the problem is that if the main server is out, then all the content is out as well using subdomain depending on where the content is hosted, but then if we change the user content from one domain to another one, we will have to change his links as well Do you know a better option or is that really the only two available ? I am wondering how big websites like youtube handle this problem. Thank you very much for your help,

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• Why Virtualbox VDI doubles the space of the VM hard disk?

  - by logoff

  I have one Xubuntu 12.10 64 bit Virtualbox VM on a Windows 7 64 bit host. It has one dynamic allocated hard disk with VDI format with maximum capacity of 20GB. If I use a command df -h in the VM I get that 5.3GB are in use in th main partition. I have only 2 partitions, one for the ext4 hard disk and another with 512MB of swap. I have no snapshots. The VDI file of this VM has 10.7GB. It is normal this difference of space? It is caused because the VDI format?

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• Multiple EyeFinity Display groups

  - by Shinrai

  Is it possible with an EyeFinity enabled card to make multiple display groups at once? I was playing with a FirePro 2460 and while a 4x1 or 2x2 display group works quite nicely, if I make a 2x1 display group and then select one of the other displays to try to make a second 2x1 display group, it disables the first one. Is there any way to circumvent this behavior and set up two separate spans on the same card? Additionally, can you set up distinct display groups if they're on different cards? I will have the opportunity to test several of these cards in one machine very shortly, but I'm curious if anyone has any experience. EDIT: I can confirm that you can make multiple spans on multiple cards (as long as they don't cross cards, obviously) (If the answers are different for FirePro/FireMV cards and Radeon cards, that is helpful and relevant knowledge - I doubt it, though.)

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• Is there a way to convert a list of cc'es to a distribution list in Outlook?

  - by Will M

  In Outlook 2003, I find myself frequently sending emails to the same group of people all working on a project. I'd like to find a simple way to convert the list of addresses in an email that I would "reply all" to into an Outlook distribution list for future use. I know how to create Outlook distribution lists, that's not my question. But the normal process that I see in Outlook requires adding the names to the list one by one. If I have an email with a large "reply all" list is there any way to take that whole list all at once (including many email addresses not otherwise already in my Outlook contacts) and convert it to a distribution list in one step? Trying to google for this answer got me many, many pages of instructions on how to create a distribution list, but I can't seem to find the search term to locate an answer on how to convert a list of address.

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• Setup for NEW HDD?

  - by Ed Markey

  Building my FIRST computer. Will start with at least - one HDD, I purchased a WD SATA HDD a 10,000RPM VelociRaptor 500GB. I have read that if you use one of the settings, can't remember what it's called, that it would make an HDD rund at IDE speeds??? Could I or should I run it in RAID instead? Is RAID only for more than one HDD/ssd? I would like to get like a 64GB SSD later to maybe speed things up working together. Thanks

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• Maxivista vs. Synergy vs. hardware KVM switches [closed]

  - by GetFree

  I have 2 PCs on my desk, each one with its own screen, mouse and keyboard. And it's a pain moving from one PC to the other (even though they are one foot away from each other). So, it's time to change to different approach: KVM switches. What would you recommend for a setup like mine? I dont need to change monitors since they are both in front of me. I just need a way to change mouse and keyboard. I use Windows on both PCs and money is not an issue if it worth it. What would be the best option for a seamless integration of the two PCs? Edit: What about other software similar to Synergy, like Input Director? What's more convenient in your experience?

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• Problem creating sitecollection when database attached has been deleted

  - by pkspt

  Hi, I created one new sitecollection in new contentdatabase but later i changed my mind and decided to create it in the same database as of the webapplication. I deleted the sitecollection I created through newdatabase and bt now when I am creating that site again its getting attached to the new database which got created above not the same one? Any solution for that I tried deleting database which got created after deleting site collection. Now, when I when I am trying to create a site its looking for old database and giving me error as its not able to open it. Any suggestions on this one..?

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• How does Apache process several requests at a time?

  - by Vicenç Gascó

  In a short question: If 10 requests hit Apache, does it process them one by one, so when R3 finishes, then it starts to run R4, or does it fire 10 processes/threads/whatever and are resolved simultaneously? Now some background: I have a PHP script that takes up to two minutes to do some processes. My question is: while a client is waiting for this 2 minutes, all the other clients requests are being processed? Or also waiting for this one to end? By the way, if there are simultaneous request, how can I handle them? Let's say put a limit on them. Or a limit on resources consumed. For instance I want the server to use its 80% performance on serving the webapp, and just a 20% for those long operations ... because I have no hurry to end them. Doesn't know if it cares but is all in PHP. Thanks in advance!!

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• Large OSX 10.6 to Windows 7 smb transfers fail?

  - by user41724

  I'm connecting to a windows 7 box from a OSX 10.6 box via smb: smb://ftp1 Connection works fine, I can transfer individual files one at a time, but as soon as I try and move an entier folder I get the following error: The Finder can’t complete the operation because some data in “test” can’t be read or written. (Error code -36) This error happens on all our OSX boxes when trying to push the entier folder to the Win7 box. The folder TEST in the above error message has -R 777 permissions. I can move every image file to the windows box one by one with no errors. But if I try an move the entier folder. bam error out. This error seems to kill the smb client on the Windows box as well. There's an FTP server on the windows box and I can FTP in from the OSX box and move everything just fine. Not sure what is going on here?

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• How I can view and block specific applications temporarily from accessing Internet?

  - by Curious Apprentice

  I don't want to block any application permanently from accessing internet. I just want to block some specific applications for a particular time period to gain speed in running some other. I know about one such great tool - that is "Comodo firewall". It can smoothly block and accurately display apps accessing internet. The only problem of installing this is, Windows recommends only one firewall apps and as Im running Windows 7 x64 Ultimate there will be complications if I install this one. I need a tool which can accurately display which apps are accessing internet (through which port) and how much data they are receiving or sending. I also need some arrangement within the app so that I can easily temporarily block that app from accessing internet.

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• Wireshark TCP Window Size Value

  - by T Vernon

  I am debugging an application with Wireshark and watching the TCP Window Size value shrink on one side of the communication. If the packet's TCP section shows a "Window size value: 1", does that mean the source's window size is 1 or the destination's window size is 1? I know one side is communicating faster than the other can handle, I just want be sure I know which one it is. 1 192.168.0.1 - 192.168.0.100, Modbus/TCP, Length: 66, Window Size Value: 1 2 192.168.0.100 - 192.168.0.1, TCP, Length: 60, Window Size Value: 92 3 192.168.0.100 - 192.168.0.1 TCP, Length: 310, Window Size Value: 92 4 192.168.0.1 - 192.168.0.100 TCP, Length: 54, Window Size Value: 0 So is 192.168.0.1's window size 0 or is it reporting that 192.168.0.100's window is 0? Thanks.

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• SAN for Medium Business - Where to start? [closed]

  - by Henson

  I've always run Linux on my home computers, and done PC repair for years, but this is my first experience with needing to buy a SAN. I thought I was knowledgeable, but I feel a bit lost. I need to be able to support 25 VMs, which are currently managed through vSphere. The company I'm at is growing quickly though, so I'd like to plan for the future. Ideally, I want a solution that I can just tack arrays onto and manage as one large, iSCSI drive. Suggestions? Good resources? If I can find something that appears to software as one large drive, am I better off going with a solution like FreeNAS or Starwind, or an all-in-one proprietary solution like NetApp? Cost, is (of course, and always I'm sure) an issue.

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• Computer won't start when connecting SATA HDD

  - by vlad

  I just bough a new HDD some time ago and recently i bought another SATA cable to have both HDDs connected at the same time, to transfer all the files from the older one to the newer. When i connected both of them, the computer started working, i tapped F2 to go to bios to make sure it was detected, and then after 5-10 seconds the computer instantly shut down. After this incident, my computer won't start at all when connecting the SATA power supply to the old HDD. If i connect only my new drive, it works without any problem. If i connect only my old drive, or both the old drive and the new one, and then push on the power button, the cpu fan simply rotates about 5 degrees and then stops.. and that's it, the computer doesn't start, and no sound from the pc speaker either. Is there any way to recover my files from the old HDD and transfer them to my new one? I do not want to use the old HDD any more, i only need to save all my files.

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• Synergy over a LAN bridge in Windows 7 64-bit, connection timing out

  - by bmozzy

  I haven't seen a question like this anywhere, so I hope it isn't a duplicate. Anyway, I have two computers, and one of them has its network connection through a LAN bridge in the other, which goes to a router. I want to set them up so that the one with the bridge is the server, and the other is the client. I followed the instructions to get everything set up, and the client keeps saying that the connection timed out. Here are screenshots of Synergy running on the server and client, as well as one of the server's configuration. Thanks in advance for the help!

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