SSD and VSAN Datastore Size Maximums

[RanjnaAggarwal]

Is there any maximum limit for SSD and VSAN datastore size?

[crosdorff]

I can't find a datastore maximum on this document:

(page 10) http://www.vmware.com/pdf/vsphere5/r55/vsphere-55-configuration-maximums.pdf

[rgoto]

https://www.vmware.com/files/pdf/products/vsan/VSAN_Design_and_Sizing_Guide.pdf  give this a try.

[zdickinson]

Good link.  I don't know that there are any limits to size specifically, but the limits of other items will come into play.  Max VMs for HA, max hosts for a cluster, max objects per host, etc...  The only thing that I can think of is that with an all flash vSAN, only 600 GB of caching SSD will be used per host, no matter big the SSD is.

All Flash VSAN - One versus multiple disk groups

[CHogan]

Just to clarify, it is 600GB per disk group. It is not a per host maximum. Since you can have 5 disk groups per host, this will give you a total WB cache of 3TB per host.

[zdickinson]

Thank you for the clarification, Zach.

[RanjnaAggarwal]

Comac, is this 600GB limit is same in vsan 6 and vsan 5.5? and what is supported maximum size of vsan datastore?

[CHogan]

There is no all-flash configuration in 5.5, so no, it is not applicable to 5.5.

[RanjnaAggarwal]

then in diskgroup what is maximum size limitation for the vsan?

[zdickinson]

I don't believe there is a maximum other than you can have up to 7 disks in a group times however big a disk you can get.  Thank you, Zach.