We have some 850 pro 256gb ssds if anyone interested to buy:) And also there was new 850 pro firmware that broke peoples disk which was revoked later etc... I'm sticking with only vacuum cleaners from Samsung for now, maybe... :) On Aug 25, 2015 12:02 PM, "Voloshanenko Igor" <[email protected]> wrote:
> 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 <[email protected]>: > >> 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]> >>> >> >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> >
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