Hello Warren, On Tue, 12 Jul 2016 21:09:16 +0000 Warren Wang - ISD wrote:
> Our testing so far shows that it¹s a pretty good drive. We use it for the > actual backing OSD, but the journal is on NVMe. The raw results indicate > that it¹s a reasonable journal too, if you need to colocate, but you¹ll > exhaust write performance pretty quickly depending on your workload. We > also have them in large number. So far, so good. > While I assume that you're talking about the SM863 (which size?), you do know the ole saying about "assume". ^o^ So just for the record, which SSD model are you refering to? Christian > Warren Wang > > > > > > On 7/8/16, 1:37 PM, "ceph-users on behalf of Carlos M. Perez" > <ceph-users-boun...@lists.ceph.com on behalf of cpe...@cmpcs.com> wrote: > > >I posted a bunch of the more recent numbers in the specs. Had some down > >time and had a bunch of SSD's lying around and just curious if any were > >hidden gems... Interestingly, the Intel drives seem to not require the > >write cache off, while other drives had to be "forced" off using the > >hdparm -W0 /dev/sdx to make sure it was off. > > > >The machine we tested on is a Dell C2100 Dual x5560, 96GB ram, LSI2008 IT > >mode controller > > > >intel Dc S3700 200GB > > Model Number: INTEL SSDSC2BA200G3L > > Firmware Revision: 5DV10265 > > > >1 - io=4131.2MB, bw=70504KB/s, iops=17626, runt= 60001msec > >5 - io=9529.1MB, bw=162627KB/s, iops=40656, runt= 60001msec > >10 - io=7130.5MB, bw=121684KB/s, iops=30421, runt= 60004msec > > > >Samsung SM863 > > Model Number: SAMSUNG MZ7KM240HAGR-0E005 > > Firmware Revision: GXM1003Q > > > >1 - io=2753.1MB, bw=47001KB/s, iops=11750, runt= 60000msec > >5 - io=6248.8MB, bw=106643KB/s, iops=26660, runt= 60001msec > >10 - io=8084.1MB, bw=137981KB/s, iops=34495, runt= 60001msec > > > >We decided to go with Intel model. The Samsung was impressive on the > >higher end with multiple threads, but figured for most of our nodes with > >4-6 OSD's the intel were a bit more proven and had better "light-medium" > >load numbers. > > > >Carlos M. Perez > >CMP Consulting Services > >305-669-1515 > > > >-----Original Message----- > >From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of > >Dan van der Ster > >Sent: Tuesday, July 5, 2016 4:23 AM > >To: Christian Balzer <ch...@gol.com> > >Cc: ceph-users <ceph-users@lists.ceph.com> > >Subject: Re: [ceph-users] Quick short survey which SSDs > > > >On Tue, Jul 5, 2016 at 10:04 AM, Dan van der Ster <d...@vanderster.com> > >wrote: > >> On Tue, Jul 5, 2016 at 9:53 AM, Christian Balzer <ch...@gol.com> wrote: > >>>> Unfamiliar: Samsung SM863 > >>>> > >>> You might want to read the thread here: > >>> http://lists.ceph.com/pipermail/ceph-users-ceph.com/2016-February/007 > >>> 871.html > >>> > >>> And google "ceph SM863". > >>> > >>> However I'm still waiting for somebody to confirm that these perform > >>> (as one would expect from DC level SSDs) at full speed with sync > >>> writes, which is the only important factor for journals. > >> > >> Tell me the fio options you're interested in and I'll run it right now. > > > >Using the options from Sebastien's blog I get: > > > >1 job: write: io=5863.3MB, bw=100065KB/s, iops=25016, runt= 60001msec > >5 jobs: write: io=11967MB, bw=204230KB/s, iops=51057, runt= 60001msec > >10 jobs: write: io=13760MB, bw=234829KB/s, iops=58707, runt= 60001msec > > > >Drive is model MZ7KM240 with firmware GXM1003Q. > > > >-- > >Dan > > > > > >[1] fio --filename=/dev/sdc --direct=1 --sync=1 --rw=write --bs=4k > >--numjobs=1 --iodepth=1 --runtime=60 --time_based --group_reporting > >--name=journal-test _______________________________________________ > >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 > > This email and any files transmitted with it are confidential and intended > solely for the individual or entity to whom they are addressed. If you have > received this email in error destroy it immediately. *** Walmart Confidential > *** > -- Christian Balzer Network/Systems Engineer ch...@gol.com Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
