I intend to have 5-8 OSDs for 400GB SSD.
Should there be different partitions for each OSD on the SSD? Thanks, Sunday Olutayo ----- Original Message ----- From: "Dominik Zalewski" <dzalew...@optlink.co.uk> To: "SUNDAY A. OLUTAYO" <olut...@sadeeb.com>, "ceph-users" <ceph-users@lists.ceph.com> Sent: Wednesday, August 5, 2015 3:38:20 PM Subject: Re: [ceph-users] Ceph Design I would suggest splitting OSDs across two or more SSD journals (depending on OSD write speed and SSD sustained speed limits) e.g 2x Intel S3700 400GB for 8-10 OSDs or 4x Intel S3500 300GB for 8-10 OSDs (it may vary depending on the setup) If you RAID-1 SSD journals they will potentially "wear out" in the same time due to writes happening on both of them. You only going to get journal write performance penalty with RAID-1. Dominik On Wed, Aug 5, 2015 at 3:37 PM, Dominik Zalewski < dzalew...@optlink.co.uk > wrote: I would suggest splitting OSDs across two or more SSD journals (depending on OSD write speed and SSD sustained speed limits) e.g 2x Intel S3700 400GB for 8-10 OSDs or 4x Intel S3500 300GB for 8-10 OSDs (it may vary depending on the setup) If you RAID-1 SSD journals they will potentially "wear out" in the same time due to writes happening on both of them. You only going to get journal write performance penalty with RAID-1. Dominik On Tue, Aug 4, 2015 at 10:54 PM, SUNDAY A. OLUTAYO < olut...@sadeeb.com > wrote: <blockquote> I am thinking of having ceph journal on a RAID1 SSD. Kindly advise me on this, does the RAID1 SSD for journal make sense? _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com </blockquote>
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