Re: He8 drives

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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
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