HM NG on prem installation: thick or thin ?

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  • Updated 2 years ago
Hi All, what is the difference between installin HM NG on prem and chosing THICK or THIN while creating the VM ?

Alll I know is that THICK allocates 250 GB of disks, what in terms of disk allocation for a THIN installation? Can I change the allocated disk size i.e. resizing from 250 GB to 150 GB after a THINK installatio or expanding if not enough in the future after a THIN installation ?

Thx in advance

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Franco Gobbetti

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Posted 2 years ago

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Bill W.

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The Thick and Thin options are VMware options and not an Aerohive configuration. Thick and Thin refer to how VMware provisions the disks.  In simplest terms, thick provisions all of the drive space upon creation.  Thin provisions drive space as needed, but the drive still appears to the OS as what you originally sized it at.

So in your example if you setup the drive as 250 GB, in Thick VM would allocate 250 GB of storage during creation.  In Thin, VM would allocate just the needed storage space for the VM to allocate the current data.  As the VM needs more storage space, it would add up to the 250 GB.

To re-size your disks, you would need to create a new VM with the size drive you wanted and then migrate your database to the new VM.  It's not as simple as expanding a drive on a Windows host. My recommendation is to make sure you follow the sizing guidelines for your current number of APs and projected growth over the next 3-5 years that Aerohive provides.  You don't want to size the drive too small.  If you do, you could eventually run into an issue creating backups.
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Andrew Garcia, Official Rep

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If this is a production system, we would recommend thick provisioning for performance reasons.