I did not only "osd bench". Performed rbd image mapped and DD test on it... here also got very less number with image on SSD pool as compared with image on HDD pool. As per SSD datasheet - they claim 500 MB/s, but I am getting somewhat near 50 MB/s with dd cmd. On Fri, Aug 18, 2017 at 6:32 AM, Christian Balzer <chibi@xxxxxxx> wrote: > > Hello, > > On Fri, 18 Aug 2017 00:00:09 +0200 Mehmet wrote: > >> Which ssds are used? Are they in production? If so how is your PG Count? >> > What he wrote. > W/o knowing which apples you're comparing to what oranges, this is > pointless. > > Also testing osd bench is the LEAST relevant test you can do, as it only > deals with local bandwidth, while what people nearly always want/need in > the end is IOPS and low latency. > Which you test best from a real client perspective. > > Christian > >> Am 17. August 2017 20:04:25 MESZ schrieb M Ranga Swami Reddy <swamireddy@xxxxxxxxx>: >> >Hello, >> >I am using the Ceph cluster with HDDs and SSDs. Created separate pool >> >for each. >> >Now, when I ran the "ceph osd bench", HDD's OSDs show around 500 MB/s >> >and SSD's OSD show around 280MB/s. >> > >> >Ideally, what I expected was - SSD's OSDs should be at-least 40% high >> >as compared with HDD's OSD bench. >> > >> >Did I miss anything here? Any hint is appreciated. >> > >> >Thanks >> >Swami >> >_______________________________________________ >> >ceph-users mailing list >> >ceph-users@xxxxxxxxxxxxxx >> >http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > -- > Christian Balzer Network/Systems Engineer > chibi@xxxxxxx Rakuten Communications > _______________________________________________ > 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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