On 12/06/2013 11:00 AM, Cristian Falcas wrote:
Hi all,
What will be the fastest disks setup between those 2:
- 1 OSD build from 6 disks in raid 10 and one ssd for journal
- 3 OSDs, each with 2 disks in raid 1 and a common ssd for all
journals (or more ssds if ssd performance will be an issue)
Mainly, will 1 OSD raid 10 be faster or slower then independent OSDs?
Simply run 6 OSDs without any RAID and one SSD for the journaling.
Danger is though, if you loose the journal, you loose all OSDs. So
better place two SSDs and then 3 OSDs per journal and make sure that
using crush objects go two OSDs on the different journals.
You shouldn't use RAID underneath a OSD, let the replication handle all
that.
Best regards,
Cristian Falcas
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