And should I mention that in another CEPH installation we had samsung 850 pro 128GB and all of 6 ssds died in 2 month period - simply disappear from the system, so not wear out...
Never again we buy Samsung :) On Aug 25, 2015 11:57 AM, "Andrija Panic" <[email protected]> wrote: > First read please: > > http://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/ > > We are getting 200 IOPS in comparison to Intels3500 18.000 iops - those > are constant performance numbers, meaning avoiding drives cache and > running for longer period of time... > Also if checking with FIO you will get better latencies on intel s3500 > (model tested in our case) along with 20X better IOPS results... > > We observed original issue by having high speed at begining of i.e. file > transfer inside VM, which than halts to zero... We moved journals back to > HDDs and performans was acceptable...no we are upgrading to intel S3500... > > Best > any details on that ? > > On Tue, 25 Aug 2015 11:42:47 +0200, Andrija Panic > <[email protected]> wrote: > > > Make sure you test what ever you decide. We just learned this the hard > way > > with samsung 850 pro, which is total crap, more than you could imagine... > > > > Andrija > > On Aug 25, 2015 11:25 AM, "Jan Schermer" <[email protected]> wrote: > > > > > I would recommend Samsung 845 DC PRO (not EVO, not just PRO). > > > Very cheap, better than Intel 3610 for sure (and I think it beats even > > > 3700). > > > > > > Jan > > > > > > > On 25 Aug 2015, at 11:23, Christopher Kunz <[email protected]> > > > wrote: > > > > > > > > Am 25.08.15 um 11:18 schrieb Götz Reinicke - IT Koordinator: > > > >> Hi, > > > >> > > > >> most of the times I do get the recommendation from resellers to go > with > > > >> the intel s3700 for the journalling. > > > >> > > > > Check out the Intel s3610. 3 drive writes per day for 5 years. Plus, > it > > > > is cheaper than S3700. > > > > > > > > Regards, > > > > > > > > --ck > > > > _______________________________________________ > > > > ceph-users mailing list > > > > [email protected] > > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > _______________________________________________ > > > ceph-users mailing list > > > [email protected] > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > > -- > Mariusz Gronczewski, Administrator > > Efigence S. A. > ul. Wołoska 9a, 02-583 Warszawa > T: [+48] 22 380 13 13 > F: [+48] 22 380 13 14 > E: [email protected] > <mailto:[email protected]> >
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