[PVE-User] Ceph + ZFS?

Lindsay Mathieson lindsay.mathieson at gmail.com
Thu Jun 2 15:40:11 CEST 2016

On 2/06/2016 11:29 PM, Eneko Lacunza wrote:
> We have it as per defaults in PVE 4.x . 

No barriers then, not recommend for ceph integrity

> We just built a 3-node 6-OSD cluster for 2 Windows VMs and another 
> pair of Debian VMs and performance is quite good for the resiliency/HA 
> capabilities if offers to us.

I was running a 3 node 9 osd cluster, but we run 10 Windows VM's per 
node, ceph wasn't coping - VM's very sluggish. Not just iops, but ceph 
didn't ciope well in low memory situations. Moving to gluster helped a 
lot, but we also switched to 12 disks (4 *3TB WD Red in RaidZ10 per 
node). That + a ssd log/cache made a huge difference.

How much RAM do you have? what sort of networking? just running 3*1G 
LACP bonded for us.

Lindsay Mathieson

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