> The good SSDs will report how much of their estimated life has been used. > It's not in the SMART spec though, so different manufacturers do it differently (or not at all). > I'm planning to monitor those value, and replace the SSD when "gets old". > I don't know exactly what that means yet, but I'll figure it out. > It's easy to replace SSDs before they fail, without losing the whole OSD. We have a smallish cluster (3 nodes, 30TB RAW storage) with 6 Intel dc S3500 120GB disks for journals. We have between 300-600Mbit of continuous incoming data and lose a 2-3 percent of lifetime per week. I would highly recommend to monitor this if you are not doing this already ;) Buying bigger SSDs will help because the writes are spread across more cells. So a 240GB drive should last 2x a 120GB drive. Cheers, Robert van Leeuwen -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140717/47ae491e/attachment.htm>
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