To be honest, Samsung 850 PRO not 24/7 series... it's something about desktop+ series, but anyway - results from this drives - very very bad in any scenario acceptable by real life...
Possible 845 PRO more better, but we don't want to experiment anymore... So we choose S3500 240G. Yes, it's cheaper than S3700 (about 2x times), and no so durable for writes, but we think more better to replace 1 ssd per 1 year than to pay double price now. 2015-08-25 12:59 GMT+03:00 Andrija Panic <andrija.pa...@gmail.com>: > 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" <andrija.pa...@gmail.com> 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 >> <andrija.pa...@gmail.com> 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" <j...@schermer.cz> 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 <chrisl...@de-punkt.de> >> > > 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 >> > > > ceph-users@lists.ceph.com >> > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > >> > > _______________________________________________ >> > > ceph-users mailing list >> > > ceph-users@lists.ceph.com >> > > 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: mariusz.gronczew...@efigence.com >> <mailto:mariusz.gronczew...@efigence.com> >> > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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