VDI Calculator v5.8 is Now Available with XenDesktop support for Nutanix

Today I am announcing the general availability of the new VDI Calculator v5.8. This new version introduces few  important features.

  • XenDesktop support for Nutanix Platform – previously only Horizon View calculations on Nutanix platform was possible. This release introduces full calculation for XenDesktop pooled and assigned on Nutanix.
  • Increase to up to 5 Desktop Types – previously a maximum of three different desktop types could be configured. This release allows for a maximum of five desktop types to be simultaneously calculated . This feature is specially helpful for large VDI deployments with multiple departments using multiple different master images.
  • Italian and French Languages Support – in addition to Chinese and Spanish. The calculator will automatically follow regional settings and provide you with your language.
  • Squashed few little bugs



I would like to acknowledge the great work from Frank Fan, Javier Larea, Emmanuel Bernard and Fabrizio de Luca  for their contributions to the multi-language support. The screenshot below detonates the Italian version of the calculator.


Important Notes

  • Java  will request authorization to execute. This will be fixed for the next release.
  • There is a known issue when loading a saved calculation with more than 1 desktop type. In this case you must first open the amount of Desktop Tabs you want to load from the saved file. You do that clicking on (+) and (-).


To access the new VDI calculator click here.


This article was first published by Andre Leibovici (@andreleibovici) at myvirtualcloud.net.


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    • banc on 05/01/2014 at 7:44 am

    Hi Andre

    Great to see yet another version with even more features! Is there any chance you can add the NX1050 nodes? We see many projects coming for the smaller nodes…

  1. @banc can you tell me why NX1050 are being used for VDI? Branch offices or similar?

    • banc on 05/13/2014 at 4:25 am

    Hi Andre

    We have many smaller customers which are building environments for 50-200 VDI desktops. Often with a NX-1350 we can satisfy their requirements.

    • Joonas on 11/23/2014 at 10:11 am


    Out of interest, what kind of speeds could one expect with an NX-1350 when copying a file within the same disk. We have an NX-1350 (with 3 nodes) at my work (running Hyper-V & SCVMM with Windows server 2012 R2) and when doing a file copy within the same folder (a shared folder in this case, but that shouldn’t really matter here), the speeds vary between 20 MB/s – 50 MB/s, which to me sounds like anything but right. Seems to me like there’s at least 1 zero (if not many) missing from the results 🙂
    I couldn’t find any specs for that, but I wondered if you could give me any clue what approximately “normal” speeds are like.. (of course varying on the amount of load and other factors).

    Best regards,

  2. Joonas, several factors will impact the speed of the copy – how many ops is the copy keeping outstanding? Is the data sitting in the hot tier or the HDD? Is the system otherwise idle? Since this is a shared folder, is ODX enabled in the guest OS?

    Looking at the 3.5.2 Hyper-V release performance numbers, we get 79 MBPS sequential write performance (1MB block size) in the hot tier with single node, single vdisk, one-op outstanding. We get 234 MBPS sequential write performance (1MB block size) with single vdisk, multiple ops outstanding. If ODX is leveraged, we keep multiple 1MB ops outstanding internally so we should be closer to 234MBPS.

    Since your workload is reading from and writing to Nutanix storage, let’s half these numbers for a back-of-the-envelop calculation, so we should expect ~40 MBPS without ODX and ~120 MBPS with ODX when reading from/writing to the hot tier.

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