How does XenDesktop solution with PVS and Personal disk work

Hello there,

Please advise how XenDesktop solution using PVS with personal disk option works, if so what infrastructure are required, as far as PVS is concerned?

And how it works?

If suppose I need to deploy x64 bit Windows 7 machine with 40 GB personal disk option?

Please advise.

Thanks and Regards.
goprasadAsked:
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goprasadAuthor Commented:
Please advise.
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CoralonCommented:
The way PVS works - (obviously in a super-short description) you build a VM with your OS, Apps, etc.  You install the virtual desktop agent, and then the PVS software.  When you install the PVS software, it will create a vdisk on your PVS server, and will use xenconvert to convert the physical disk over to the virtual disk.  When all this is completed, you detach the local disk, and the OS etc. are streamed from the PVS server to the virtual machines.  (Obviously, there are a *lot* of inbetween steps to this.

Each PVS machine should have a fixed disk attached to it (typically 6-10GB).  That disk is used to handle the OS writes.

The PvD disks are a 2nd disk attached to the VM, and that is used to store the profile, and to allow the user to install their own applications.

So, each of your end machines will have 2 local disks (the writecache disk, and the personal vDisk).  When it is booted, it will have the streamed OS drive, plus the 2 locals.

As for infrastructure, your minimum is a PVS server (that assumes you aren't using anything other than physical clients).   The server should have enough RAM to cache a decent portion of the OS (very rough ballpark is 600MB-800MB RAM per disk image, although more is better).

A typical small scale deployment consists of:
2 - Web Interface/StoreFront servers
2 - XenDesktop brokers (for load balancing)
2 - PVS servers (for load balancing)
x number of virtualization hosts (VMware, XenServer, Hyper-V) (it depends on how many machines you are going to deploy)
1 - server for storage of the PVS disk images.  Typically it is an NFS server, but you can use a Windows server, but you have to make some registry modifications to that server.

In my deployment, I have 3 virtualization hosts (VMWare 5.1), and 2 of the other servers listed, along with a Netscaler VPX.  

As far as the pvd's being 40GB, that seems awefully large, unless you are going to have gigantic profiles, or a *lot* of user installed apps.  

And the last consideration for this - you will deploy your PVS images as pooled images, that are assigned on first use.  Since the users profile will live on the PVD, the same user has to hit the same machine every time.

Coralon
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goprasadAuthor Commented:
Thank you very much for the detailed info. Please advise if there are downside or disadvantages of using personal vdisk for xendesktop deployment?
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basrajCommented:
Nope. With Personal vDisk you can save lot more storage space compared to Dedicated VDI. You can still provide users with static images and along with 10 GB Personal vdisk or more. This way it helps to maintain static images as well give users an option to install apps of their choice. Dedicated VDI ate up more space with previous version on XenDesktop and that's where PVS got introduced.
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CoralonCommented:
The one downside I have heard of is the overhead of the system 'integrating' the PVD with the system, so you incur some overhead using it.  Other than that, it is supposed to be a pretty solid solution.

Coralon
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goprasadAuthor Commented:
One last question on this thread, Personal vDisk is only possible using PVS OR can we have PVD using MCS
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CoralonCommented:
It can be used with either.

Coralon
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