Hello guys, Was wondering if anyone has done testing on Samsung PM863 120 GB version to see how it performs? IMHO the 480GB version seems like a waste for the journal as you only need to have a small disk size to fit 3-4 osd journals. Unless you get a far greater durability. I am planning to replace my current journal ssds over the next month or so and would like to find out if there is an a good alternative to the Intel's 3700/3500 series. Thanks Andrei ----- Original Message ----- > From: "Wido den Hollander" <wido@xxxxxxxx> > To: "ceph-users" <ceph-users@xxxxxxxxxxxxxx> > Sent: Monday, 21 December, 2015 19:12:33 > Subject: Re: Intel S3710 400GB and Samsung PM863 480GB fio results > On 12/21/2015 05:30 PM, Lionel Bouton wrote: >> 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, ...). >> > > Interesting! I might be able to gain access to some PM836 3,84TB SSDs > later this week. > > I'll run the same tests if I can. Interesting to see how they perform. > >> Best regards, >> >> Lionel >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > -- > Wido den Hollander > 42on B.V. > Ceph trainer and consultant > > Phone: +31 (0)20 700 9902 > Skype: contact42on > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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