On 03/17/2013 05:40 PM, Matthieu Patou wrote:
Hello all, Our dev environment are quite I/O intensive but didn't require much space (~20G per dev environment), for the moment our dev machines are served by VMWare and the storage is done in NFS appliances with SAS or SATA drives. After some testing with consumer grade SSD we discovered that built speed could be greatly improved by using SSD but having SSD in NFS appliances is very costly. So I'm thinking of using consumer grade or even intel s3700 SSD and ceph as the backend storage. Is there any cons using SSD for data storage (apart from the price per GB that is higher than SAS drives) ?
Were you thinking of using CephFS? If so, be aware that it's not really recommended for production use yet. If you were thinking RBD, that's fine, but you should be aware that you may need to do some tweaking and have a lot of concurrency to get high IOPS. I'd highly recommend testing out your use case on a small scale (maybe a 1 or 2 nodes with a couple of SSDs before diving in head first.
Obviously if I don't want to lose my data I need to have twice has much space that is required so that objects are at least stored twice, is there anything else that I need to pay attention too ?
In a previous job we had some consumer grade SSDs used for Lustre journals. They tended to die pretty quickly, and often in clumps. That was a couple of years ago and consumer grade drives have improved since then, but I'd definitely be tempted to go with the S3700. It looks like a fantastic drive.
Mark
Matthieu. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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