Hi , We got a good deal on 843T and we are using it in our Openstack setup ..as journals . They have been running for last six months ... No issues . When we compared with Intel SSDs I think it was 3700 they were shade slower for our workload and considerably cheaper. We did not run any synthetic benchmark since we had a specific use case. The performance was better than our old setup so it was good enough.
hth On Tue, Aug 25, 2015 at 12:07 PM, Andrija Panic <andrija.pa...@gmail.com> wrote: > 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" <igor.voloshane...@gmail.com> > 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 <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 >>> >>> >> > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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