Re: OSD nodes with >=8 spinners, SSD-backed journals, and their performance impact

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2013/1/15 Mark Nelson <mark.nelson@xxxxxxxxxxx>:
> http://www.supermicro.com/products/chassis/2U/826/SC826BA-R920LP.cfm
>
> That chassis has 12 3.5" bays in front, with 2 2.5" bays in back.  an
> interesting setup could be 12 spinning disks, with 2 very fast SSDs used for
> journals and OS.  Would need to test it first, and not sure I like putting
> the OS on the journal drives.  A more modest setup would be just to have the
> 12 spinning disks for data and journals and the rear drives for the OS.

Thank you. We have planned the same with a DELL R515 12+2 disks.
OS should be loaded from a RAID1 partitions from 2 spinning disks.

Or even no raid, in case of failure, the whole node is replicated by ceph.
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