![]() You could reduce IOPS by as much as 95% depending on how much RAM you can assign to the cache! The more RAM you assign to the memory cache the less chance writes will ever reach disk. When overflowing writes to a disk keep in mind that you don’t want this to be the point of a bottleneck so size the environment properly and place temporary disks on storage that won’t pose a big degradation in performance. You now have the option of using temporary memory (RAM) to handle the caching of writes and a temporary disk in the event the RAM cache becomes full. Previously with MCS, temporary writes went to the delta/differencing disk attached to the VM. This greatly decreases write I/O so you don’t have to rely as much on the underlying storage or worry about hitting a storage bottlenecks as you scale the desktop environment. If everything works, you can now delete the original virtual disk.Citrix Machine Creation Services as of XenApp/XenDesktop 7.9 provides the ability to write to memory with overflow to disk just like what is available with PVS using RAM w/ overflow to HDD. Boot the VM (from the new virtual disk).Activate the new partition in the Disk Manager (if you forget this, you won’t be able to boot from it).Run the conversion (which takes forever).Start XenConvert, select From: Volume and To: Volume (That’s not the default.). ![]() ![]() Optionally, shrink the source drive (partition) from within the virtual machine (Windows 7+ comes with the tools for that).Create a new virtual disk with the desired size.You might want to virus check the installer before running it. and followed the instructions in the above mentioned article. ![]() Now, where do we get XenConvert? It’s available for download here in various versions. Fortunately it’s still in the WaybackMachine On top of that, the tool that used to work fine for this, Citrix XenConvert, has been deprecated by Citrix and is no longer available for download.Īnd just to make matters worse, this answer on ServerFault links to an article that is no longer available (or did, until I edited it). You need to create an image of the original volume to a smaller virtual disk in order to do that. Apparently shrinking a Windows VM (actually any kind of VM) cannot be done with XenServer and XenCenter. ![]()
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December 2022
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