Hi, So are you saying this isn't true speed?
Do I just flush the journal and test again? i.e. ceph-osd -i osd.0 --flush-journal && ceph-osd -i osd.2 --flush-journal && ceph-osd -i osd.3 --flush-journal etc, etc? On Mon, Nov 20, 2017 at 2:02 PM, <ulem...@polarzone.de> wrote: > Hi Rudi, > > Am 2017-11-20 11:58, schrieb Rudi Ahlers: > >> ... >> >> Some more stats: >> >> root@virt2:~# rados bench -p Data 10 seq >> hints = 1 >> sec Cur ops started finished avg MB/s cur MB/s last lat(s) avg >> lat(s) >> 0 0 0 0 0 0 - >> 0 >> 1 16 402 386 1543.69 1544 0.00182802 >> 0.0395421 >> 2 16 773 757 1513.71 1484 0.00243911 >> 0.0409455 >> >> this values are due cached osd-data on your osd-nodes. > > If you flush your cache (on all osd-nodes), your reads will be much worse, > because they came from the HDDs. > > > Udo > -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za
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