>From my cluster of ~200 OSDs, 36K PGs # iostat -mx 1 20 /dev/md2 |grep md2 md2 0.00 0.00 0.10 2064.41 0.01 8.05 8.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 338.00 0.00 1.32 7.98 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 331.00 0.00 1.29 7.95 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 127.00 0.00 0.50 8.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 1112.00 0.00 4.34 7.99 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 2569.00 0.00 10.03 7.99 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 2361.00 0.00 9.21 7.99 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 1237.00 0.00 4.83 7.99 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 11752.00 0.00 45.90 8.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 1598.00 0.00 6.23 7.99 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 321.00 0.00 1.25 7.98 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 387.00 0.00 1.51 7.98 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 395.00 0.00 1.54 7.96 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 449.00 0.00 1.75 7.98 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 309.00 0.00 1.20 7.97 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 343.00 0.00 1.33 7.95 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 847.00 0.00 3.30 7.99 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 1636.00 0.00 6.39 8.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 10104.00 0.00 39.46 8.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 2034.00 0.00 7.94 8.00 0.00 0.00 0.00 0.00 > On 17 Jun 2015, at 11:21, Gregory Farnum <greg@xxxxxxxxxxx> wrote: > > On Wed, Jun 17, 2015 at 10:18 AM, Stefan Priebe - Profihost AG > <s.priebe@xxxxxxxxxxxx> wrote: >> Hi, >> >> Does anybody know how many data gets written from the monitors? I was using some cheaper ssds for monitors and was wondering why they had already written 80 TB after 8 month. > > 3.8MB/s? That's a little more than I would naively expect, but LevelDB > is probably doubling the total data written (at least), so that brings > it down to 1.9MB/s of real data. How big is your PGMap and OSDMap? Do > you have any logging being written to those SSDs? > Etc. ;) > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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