Betreff: simplivity. capacity

[mblee]

Hello. I have a question about simplivity. I have 2 simplivity.

 datastores use 10T. (2 Server)

If one goes down, will the capacity become 5T?

Will the VM not start due to insufficient capacity?

[ICPMuenchen]

you have to check the physical available capacity in the simplivity plugin, because the vsphere datastore can be any size, due to overprovisioning, dedup, compression etc.

when you have a 10TB Node, you would have a Cluster Capacity of 20TB, and this capacity can be assigned to vsphere datastores. also check out free Space in Simplivity Plugin and divide it by 2 (2-Node Cluster) this is the real free capacity (when one node is down)

i would also recommend to zero out your disks in the vm operating systems to free up space. simplivity is nfs based and has no free space reclamation.

[NeetSat · Accepted solution]

Hi,
When you have 2 systems of SimpliVity in a cluster, i would look into these details below: 
> Login to vCenter > Select Cluster > Monitor > SimpliVity hardware > Storage Efficiency. 
There it would list out the exact capacity you have used and available for usage. 

Now coming to the question of whether the VM will be powered on or not, so in this case, if you are aware, any VMs that are created on SimpliVity, always has a Primary copy and a synchronized Secondary copy. 
So usually in a two node SimpliVity system inside a cluster, these two copies are balanced out and the datastores are shared, which means if one host/ovc is down, then the other host still has access to the entire NFS datastores and also the VMs on it.
However on the Cluster level on the hosts, it depends on how the Cluster usage is, since if the usage on Host 1 is too high say about 80% and Host 2 has 60% usage, then it will be difficult for all the VMs to be up and running in this situation on a sigle host, since there is no resources to have them powered up. 
So its not the storage but it would basically be the CPU and Memory resources that needs to be available for all VMs to be up and running.