Hi Mark, Would you see any benefit in using a Intel P3700 NVMe drive as a journal for say 6x Intel S3700 OSD's ?
On Fri, Oct 3, 2014 at 6:58 AM, Mark Nelson <[email protected]> wrote: > On 10/02/2014 12:48 PM, Adam Boyhan wrote: > >> Hey everyone, loving Ceph so far! >> > > Hi! > > > >> We are looking to role out a Ceph cluster with all SSD's. Our >> application is around 30% writes and 70% reads random IO. The plan is >> to start with roughly 8 servers with 8 800GB Intel DC S3500's per >> server. I wanted to get some input on the use of the DC S3500. Seeing >> that we are primarily a read environment, I was thinking we could easily >> get away with the S3500 instead of the S3700 but I am unsure? Obviously >> the price point of the S3500 is very attractive but if they start >> failing on us too soon, it might not be worth the savings. My largest >> concern is the journaling of Ceph, so maybe I could use the S3500's for >> the bulk of the data and utilize a S3700 for the journaling? >> > > I'd suggest if you are using SSDs for OSDs anyway, you are better off just > putting the journal on the SSD so you don't increase the number of devices > per OSD that can cause failure. In terms of the S3500 vs the S3700, it's > all a numbers game. Figure out how much data you expect to write, how many > drives you have, what the expected write endurance of each drive is, > replication, journaling, etc, and figure out what you need! :) > > The S3500 may be just fine, but it depends entirely on your write workload. > > >> I appreciate the input! >> >> Thanks All! >> >> >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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