I really advise removing the bastards becore they die...no rebalancing hapening just temp osd down while replacing journals...
What size and model are yours Samsungs? On Sep 3, 2015 7:10 PM, "Quentin Hartman" <qhart...@direwolfdigital.com> wrote: > We also just started having our 850 Pros die one after the other after > about 9 months of service. 3 down, 11 to go... No warning at all, the drive > is fine, and then it's not even visible to the machine. According to the > stats in hdparm and the calcs I did they should have had years of life > left, so it seems that ceph journals definitely do something they do not > like, which is not reflected in their stats. > > QH > > On Wed, Aug 26, 2015 at 7:15 AM, 10 minus <t10te...@gmail.com> wrote: > >> 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 was revoked later etc...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 >>> >>> >> >> _______________________________________________ >> 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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