Hi Jeff,
I would be surprised as well - we initially tested on a 2-replica cluster with 8 nodes having 12 osd each - and went to 3-replica as we re-built the cluster.
The performance seems to be where I'd expect it (doing consistent writes in a rbd VM @ ~400MB/sec on 10GbE which I'd expect is either a limit in disks, network, qemu/kvm or the 3-replica setup kicking in)
Just curious, anything in dmesg about the disk mounted as osd.4?
Cheers,
Martin
On Tue, Aug 20, 2013 at 4:02 PM, Mark Nelson <mark.nelson@xxxxxxxxxxx> wrote:
On 08/20/2013 08:42 AM, Jeff Moskow wrote:Definitely sounds suspicious! Might be worth taking that OSD out and doing some testing on the drive.
Hi,
More information. If I look in /var/log/ceph/ceph.log, I see 7893 slow
requests in the last 3 hours of which 7890 are from osd.4. Should I
assume a bad drive? I SMART says the drive is healthy? Bad osd?
Thanks,
Jeff
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