Hey Christian, Thanks, I haven't caught up with my ceph-users backlog from last week yet so hadn't noticed that thread (SMR drives are something I was thinking about for a DR cluster and long term archival pool behind rgw). But note that the He8 drives are not SMR. Cheers, On 8 July 2015 at 11:01, Christian Balzer <chibi@xxxxxxx> wrote: > On Wed, 8 Jul 2015 10:28:17 +1000 Blair Bethwaite wrote: > >> Hi folks, >> >> Does anyone have any experience with the newish HGST He8 8TB Helium >> filled HDDs? Storagereview looked at them here: >> http://www.storagereview.com/hgst_ultrastar_helium_he8_8tb_enterprise_hard_drive_review. >> I'm torn as to the lower read performance shown there than e.g. the >> He6 or Seagate 6TB, but thing is, I think we probably have enough >> aggregate IOPs with ~170 drives. Has anyone tried these in a Ceph >> cluster yet? >> > This was just discussed last week in the "Ceph Journal Disk Size" thread. > > In short SMR HDDs seem to be a bad match for Ceph or any random I/O. > > If you have an existing cluster, why not compare the performance of your > current HDDs to those and guestimate if those SMR drives can keep up. > > As always, Ceph is better with more, smaller HDDs, if you can afford that. > If your issue is more one of density than cost, having journal SSDs and > maybe a large caching controller in front of those SMR drives should help. > > Christian > -- > Christian Balzer Network/Systems Engineer > chibi@xxxxxxx Global OnLine Japan/Fusion Communications > http://www.gol.com/ -- Cheers, ~Blairo _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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