[PVE-User] Ceph + ZFS?

Eneko Lacunza elacunza at binovo.es
Thu Jun 2 15:29:08 CEST 2016

El 02/06/16 a las 14:49, Lindsay Mathieson escribió:
> On 2/06/2016 7:55 PM, Eneko Lacunza wrote:
>> I see also that Lindsay told you small ceph setups don't give good 
>> performance; don't know about his experience, but mine is quite good. 
>> We have 4 3-node clusters (with 3-10 VMs) with ceph and are very 
>> happy with the performance. It is very important to choose the right 
>> SSD for the journal. 
> Yah, enterpise grade SSD is essential, and very expensive. Also Jeremy 
> only has one disk per node, which just won't provide enough IOPS for 
> ceph.
Well, it would give the same IOPS as those disks in local configuration, 
right? (journal is on SSD...) :)
> Do you have barriers enabled for your ceph osd filesystem? my 
> performance was ok until I (as recommended) did that.
We have it as per defaults in PVE 4.x . 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.


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