Hi, Sébastien Han just added the test results I reported for these SSDs on the following page :
http://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/ The table in the original post has the most important numbers and more details can be found in the comments. To sum things up, both have good performance (this isn't surprising for the S3710 but AFAIK this had to be confirmed for the PM863 and my company just purchased 2 of them just for these tests because they are the only "DC" SSDs available at one of our hosting providers). PM863 models are not designed for write-intensive applications and we have yet to see how they behave in the long run (in our case where PM863 endurance is a bit short, if I had a choice we would test SM863 models if they were available to us). So at least for the PM863 please remember that this report is just about the performance side (on fresh SSDs) which arguably is excellent for the price but this doesn't address other conditions to check (performance consistency over the long run, real-world write endurance including write amplification, large scale testing to detect potential firmware bugs, ...). Best regards, Lionel _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
