actually, they're very inexpensive as far as SSD's go. The 960gb m500 can be had on Amazon for $499 US on prime (as of yesterday anyway).
Sent from my mobile device. Please excuse brevity and typographical errors. On Jan 15, 2014 9:50 AM, "Sebastien Han" <sebastien....@enovance.com> wrote: > However you have to get > 480GB which ridiculously large for a journal. I > believe they are pretty expensive too. > > –––– > Sébastien Han > Cloud Engineer > > "Always give 100%. Unless you're giving blood.” > > Phone: +33 (0)1 49 70 99 72 > Mail: sebastien....@enovance.com > Address : 10, rue de la Victoire - 75009 Paris > Web : www.enovance.com - Twitter : @enovance > > On 15 Jan 2014, at 15:49, Sebastien Han <sebastien....@enovance.com> > wrote: > > > Sorry I was only looking at the 4K aligned results. > > > > –––– > > Sébastien Han > > Cloud Engineer > > > > "Always give 100%. Unless you're giving blood.” > > > > Phone: +33 (0)1 49 70 99 72 > > Mail: sebastien....@enovance.com > > Address : 10, rue de la Victoire - 75009 Paris > > Web : www.enovance.com - Twitter : @enovance > > > > On 15 Jan 2014, at 15:46, Stefan Priebe <s.pri...@profihost.ag> wrote: > > > >> Am 15.01.2014 15:44, schrieb Mark Nelson: > >>> On 01/15/2014 08:39 AM, Stefan Priebe wrote: > >>>> > >>>> Am 15.01.2014 15:34, schrieb Sebastien Han: > >>>>> Hum the Crucial m500 is pretty slow. The biggest one doesn’t even > >>>>> reach 300MB/s. > >>>>> Intel DC S3700 100G showed around 200MB/sec for us. > >>>> > >>>> where did you get this values from? I've some 960GB and they all have > > > >>>> 450Mb/s write speed. Also in tests like here you see > 450MB/s > >>>> http://www.tomshardware.com/reviews/crucial-m500-1tb-ssd,3551-5.html > >>> > >>> Looks like at least according to Anand's chart, you'll get full write > >>> speed once you buy the 480GB model, but not for the 120 or 240GB > models: > >>> > >>> > http://www.anandtech.com/show/6884/crucial-micron-m500-review-960gb-480gb-240gb-120gb > >> > >> that's correct but the sentence was " The biggest one doesn’t even > >> reach 300MB/s." > >> > >>> > >>>> > >>>>> Actually, I don’t know the price difference between the crucial and > >>>>> the intel but the intel looks more suitable for me. Especially after > >>>>> Mark’s comment. > >>>>> > >>>>> –––– > >>>>> Sébastien Han > >>>>> Cloud Engineer > >>>>> > >>>>> "Always give 100%. Unless you're giving blood.” > >>>>> > >>>>> Phone: +33 (0)1 49 70 99 72 > >>>>> Mail: sebastien....@enovance.com > >>>>> Address : 10, rue de la Victoire - 75009 Paris > >>>>> Web : www.enovance.com - Twitter : @enovance > >>>>> > >>>>> On 15 Jan 2014, at 15:28, Mark Nelson <mark.nel...@inktank.com> > wrote: > >>>>> > >>>>>> On 01/15/2014 08:03 AM, Robert van Leeuwen wrote: > >>>>>>>> Power-Loss Protection: In the rare event that power fails while > the > >>>>>>>> drive is operating, power-loss protection helps ensure that data > >>>>>>>> isn’t > >>>>>>>> corrupted. > >>>>>>> > >>>>>>> Seems that not all power protected SSDs are created equal: > >>>>>>> http://lkcl.net/reports/ssd_analysis.html > >>>>>>> > >>>>>>> The m500 is not tested but the m4 is. > >>>>>>> > >>>>>>> Up to now it seems that only Intel seems to have done his homework. > >>>>>>> In general they *seem* to be the most reliable SSD provider. > >>>>>> > >>>>>> Even at that, there has been some concern on the list (and lkml) > that > >>>>>> certain older Intel drives without super-capacitors are ignoring > >>>>>> ATA_CMD_FLUSH, making them very fast (which I like!) but potentially > >>>>>> dangerous (boo!). The 520 in particular is a drive I've used for a > >>>>>> lot of Ceph performance testing but I'm afraid that if it's not > >>>>>> properly handling CMD FLUSH requests, it may not be indicative of > the > >>>>>> performance folks would see on other drives that do. > >>>>>> > >>>>>> On the third hand, if drives with supercaps like the Intel DC S3700 > >>>>>> can safely ignore CMD_FLUSH and maintain high performance (even when > >>>>>> there are a lot of O_DSYNC calls, ala the journal), that potentially > >>>>>> makes them even more attractive (and that drive already has > >>>>>> relatively high sequential write performance and high write > endurance). > >>>>>> > >>>>>>> > >>>>>>> Cheers, > >>>>>>> Robert van Leeuwen > >>>>>>> > >>>>>>> _______________________________________________ > >>>>>>> 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 > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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