RE: Using NFS as primary storage, performance issues

[ma...@gonsource.com]

The performance will be horrible if you do not have a ZIL in your pool and use NFS. You can add this at any time but you need to make sure it is a very fast, low latency SSD or NVME. Once you have this in the pool, you will see a significant performance increase. 

-----Original Message-----
From: Pierre Le Fevre <pi...@kth.se> 
Sent: Friday, April 28, 2023 4:46 AM
To: users@cloudstack.apache.org
Subject: Using NFS as primary storage, performance issues

Hi all,
We're working on upgrading our storage solution to a proper network attached storage.
Before this, we had an NFS share on some mounted disks on the management server. Our new setup is a NAS running TrueNAS (zfs) with 64 GB ram and 8x8TB, 7200 rpm hard disks mounted to cloudstack over NFS.

It seems the performance is however much lower than before, resulting in somewhat unusable virtual machines. In VMs, IOPS can be as low as <10 IOPS, vs 100 with the management server setup.

Is there a recommended setup for primary storage to yield better performance?

All the best
Pierre,
kthcloud