On 2015-07-09T14:05:55, David Burley <david@xxxxxxxxxxxxxxxxx> wrote:
> Converted a few of our OSD's (spinners) over to a config where the OSD
> journal and XFS journal both live on an NVMe drive (Intel P3700). The XFS
> journal might have provided some very minimal performance gains (3%,
> maybe). Given the low gains, we're going to reject this as something to dig
> into deeper and stick with the simpler configuration of just using the NVMe
> drives for OSD journaling and leave the XFS journals on the partition.
Thanks, those numbers are very useful.
In a similar direction, one could try using bcache on top of the actual
spinner. Have you tried that, too?
Regards,
Lars
--
Architect Storage/HA
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton, HRB 21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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