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XenServer Setup

Posted on 2013-06-16
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Last Modified: 2013-06-19
I have a Proliant DL360 G6 with 32 GB of RAM. I am running 2 virtual servers.  I do not know how to allocate the VCPUs.  what i currently have is 2 VCPUs and 16 GB memory to each virtual server.  Can someone help me out.Screenshot of current config
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Question by:cnbit
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by:basraj
ID: 39251457
Do you have the VMs running? If yes, then shut down the VMs and then try to increase the vCPUs.
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by:cnbit
ID: 39251480
I dont know what to increase it to, or what my  max options are.
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by:basraj
ID: 39251523
Max vCPUs per VM is 16 for windows and 32 for Linux Vms
RAM max per VM is 128GB.

The increase depends on the applications that runs on your VM. If you find you need more vCPUs, you can increase or you can use it for future VMs.
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by:cnbit
ID: 39251542
Right now i have 3 identical DL360 G6 servers running 2008 R2 sp1, each are carved out with 2 virtual servers with about 30 apps.  Each server is the same.  should i spread out so many apps on each server or leave them all the same.  130 users.  The reason i ask is that some app will lockup on users, or they have to clicl on an several times to open,  It starts to open then just dissapears.  I want to make sure theses servers are set up the best possible way.  Logon on times are very slow especially for our sites in other locations. I also use xencenter.
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basraj earned 500 total points
ID: 39251568
It's difficult to answer how much of memory or CPUs required to support 30 apps. The best way to determine is to use some tools like load-testing for edgesight etc.

Generally, we do a POC by taking one VM and giving it access to few users. Look at the performance and determine using that.

In your case, you can start with maximum values as you have 6VMs, you can allocate 8vCPUs and 10-16GB RAM for each VMs and monitor the performance. For better performance, you may need all your related servers like profile servers, print servers,App servers/backend servers etc close to your Citrix servers.

As you say logon time is slow, try logging with local profile instead of Roaming profile if any and see how it performs. For testing purpose do not map any printer drivers to see if it boosts the log-on performance. Make sure you have file server and Citrix server in same lan.
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by:cnbit
ID: 39252955
i went into xencenter on tried to change vCPU to 8 but it game me a message about having more than was avaialble, so i changed the 2 VM's on that serevr to 4 each.
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