On 22-12-15 13:43, Andrei Mikhailovsky wrote: > 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. > In that case I would look at the SM836 from Samsung. They are sold as write-intensive SSDs. Wido > 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 > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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