[one-users] Number of KVM hosts per cluster

[Stefan Kooman]

Quoting Dmitri Chebotarov (dchebota at gmu.edu):
> Hi
> 
> Is there a best practice for a number of KVM hosts per cluster? 
> 
> Concern I have is storage performance with large number of hosts per cluster (on system datastore).
> 
> Cluster's system datastore is on a NetApp NAS (NFS). 
> I have 40 hosts. I was thinking going with 5 clusters, 8 hosts in each cluster. 
> This should distribute load on storage side between 5 different volumes (5 system DS).

It wont help to releave the load on the NetApp filer. The NetApp filer
will handle all the IO of the hosts (in the cluster(s)) anyway. If you
want to share the load on your filer you need more of them :). If you
have several aggregates in your filer (SAS 15K, SAS 10K , SATA,
SATA/SSD) it will help to have volumes on those different aggregates to
balance the (disk) IO.

Gr. Stefan
 

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