Customers and potential customers often ask "What should my vDisk (PVS) are personal records?" The default size is 10GB, but is it too big? Too small?
Of course, the specific recommendation as to the size of the size of a PvD deployment and customer-specific deployment. However, since PVD is used internally at Citrix (for some teams), we have built a reasonable characterization of what a six-month deployment size consumption might look like. Most users of this deployment would have been to install applications in their PvD have already done, and 6 months of use is likely enough time to complete the PvD with a representative sample of the types of data and applications a particular user can install.
Before giving the numbers, some notes:
1. These PVDS were deployed for 6 months, since our press PvD 5.6.5 was shipped.
2. Users who use this PvD pool are (usually) engineers, testers, and others in the development community. I do not have access to measures of CAE for other teams.
3. Only 2 of 81 users requested to have increased the size of their PvD of 10GB by default to a larger amount. A user has 20GB allocated and used 53% of this space. The other user is myself, with a PvD 40GB, which I mainly use it to test what happens when stress PVDS approaching capacity. I probably would discount my own as an unrealistic statistical outlier.
Of the remaining PVDS used in our internal deployment, the used space is on average 36.74%, which means on average each user has consumed their PvD 3.674GB data (10GB max size). This size includes both the profile and all the changes accumulated in the PVD (app installs, etc.) since the pool was deployed there about 6 months. The greater capacity was more than 0%, and the lowest was 9%. This reflects the amount of space provisioned by the hypervisor in the last 6 months in the PvD, so this could actually be more than what users actually currently store.
We also have tested internally with our PvD building Excalibur come. Obviously, this pool of PVD is much more recent (few weeks). In this pool, the use of PVD is approximately 18% (1.8GB). It would appear that some PVDS populate GB to the front (most likely user profile data), then slowly accreting changes in above-mentioned over time. As many of you know, PVDS capture all the changes that occur in a machine, it would certainly be possible that these figures would slide up from 36%, but based on a usage model 6 months, it appears that less than half of the available space is used by a typical user.
It will be interesting to revisit this metric in another 3-6 months and see if this is true, or if the use of trays PvD space over time.
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