On Thu, Sep 06, 2018 at 05:15:26PM +0200, Marc Roos wrote: > > It is idle, testing still, running a backup's at night on it. > How do you fill up the cluster so you can test between empty and full? > Do you have a "ceph df" from empty and full? > > I have done another test disabling new scrubs on the rbd.ssd pool (but > still 3 on hdd) with: > ceph tell osd.* injectargs --osd_max_backfills=0 > Again getting slower towards the end. > Bandwidth (MB/sec): 395.749 > Average Latency(s): 0.161713 In the results you both had, the latency is twice as high as in our tests [1]. That can already make quiet some difference. Depending on the actual hardware used, there may or may not be the possibility for good optimisation. As a start, you could test the disks with fio, as shown in our benchmark paper, to get some results for comparison. The forum thread [1] has some benchmarks from other users for comparison. [1] https://forum.proxmox.com/threads/proxmox-ve-ceph-benchmark-2018-02.41761/ -- Cheers, Alwin _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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