[pve-devel] ceph replication speed
s.priebe at profihost.ag
Mon Dec 30 12:37:36 CET 2013
yes it returns successfull when all replicas are written to journal /
Not sure about the performance decrease. But generally ceph only shows
full performance with lots of parallism.
I don't know your configuration may be your journal speed is limited?
Am 30.12.2013 11:59, schrieb Dietmar Maurer:
> Hi all,
> we just notices a big write speed difference when replication size differs:
> size = 2: 100MB/s
> size = 3: 60MB/s
> The network is 10GB, so that should not be the limit.
> AFAIK ceph uses primary-copy replication, where copies to second and
> third node is done parallel?
> So why is that so much slower?
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