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/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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