Re: [ceph-users] He8 drives
On 13 July 2015 at 21:36, Emmanuel Florac eflo...@intellique.com wrote: I've benchmarked it and found it has about exactly the same performance profile as the He6. Compared to the Seagate 6TB it draws much less power (almost half), and that's the main selling point IMO, with durability. That's consistent with this other published review (which I found after the storagereview one): http://www.tomsitpro.com/articles/hgst-ultrastar-he8-8tb-hdd,2-921-8.html So seems like a decent option for a capacity-first Ceph cluster. -- Cheers, ~Blairo ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] He8 drives
Le Wed, 8 Jul 2015 10:28:17 +1000 Blair Bethwaite blair.bethwa...@gmail.com écrivait: Does anyone have any experience with the newish HGST He8 8TB Helium filled HDDs? I've benchmarked it and found it has about exactly the same performance profile as the He6. Compared to the Seagate 6TB it draws much less power (almost half), and that's the main selling point IMO, with durability. -- Emmanuel Florac | Direction technique | Intellique | eflo...@intellique.com | +33 1 78 94 84 02 ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] He8 drives
Hi, I have just expand our ceph-cluster (7 nodes) with one 8TB HGST (change from 4TB to 8TB) on each node (and 11 4TB HGST). But I have set the primary affinity to 0 for the 8 TB-disks... in this case my performance values are not 8-TB-disk related. Udo On 08.07.2015 02:28, 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? ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
[ceph-users] He8 drives
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? -- Cheers, ~Blairo ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] He8 drives
Re-added list. On Wed, 8 Jul 2015 11:12:51 +1000 Nigel Williams wrote: On Wed, Jul 8, 2015 at 11:01 AM, Christian Balzer ch...@gol.com wrote: In short SMR HDDs seem to be a bad match for Ceph or any random I/O. The He8 isn't shingled though, it is a PMR drive like the He6. Argh! That's what you get for speed reading the article from the OP. ^o^; In that case and if the IOPS of 170 drives are good enough, I rest my case. Christian -- Christian BalzerNetwork/Systems Engineer ch...@gol.com Global OnLine Japan/Fusion Communications http://www.gol.com/ ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] He8 drives
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 BalzerNetwork/Systems Engineer ch...@gol.com Global OnLine Japan/Fusion Communications http://www.gol.com/ ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] He8 drives
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 ch...@gol.com 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 BalzerNetwork/Systems Engineer ch...@gol.com Global OnLine Japan/Fusion Communications http://www.gol.com/ -- Cheers, ~Blairo ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
