Thanks for the advise! I've checked a couple of my Intel 520s which I use for the osd journals and have been using them for almost 2 years now. I do not have a great deal of load though. Only have about 60vms or so which have a general usage.
Disk 1: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 233 Media_Wearout_Indicator 0x0032 096 096 000 Old_age Always - 0 225 Host_Writes_32MiB 0x0032 100 100 000 Old_age Always - 5754781 Disk 2: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 233 Media_Wearout_Indicator 0x0032 095 095 000 Old_age Always - 0 225 Host_Writes_32MiB 0x0032 100 100 000 Old_age Always - 5697133 So, from what I can see, I still have 95 and 96 percent left on the disks and they have done around 190 TeraBytes, which seems like a lot for a consumer grade disk. Or maybe I am reading the data wrongly? Thanks Andrei ----- Original Message ----- > From: "Michael Kuriger" <[email protected]> > To: "Mark Nelson" <[email protected]>, > [email protected] > Sent: Tuesday, 25 November, 2014 5:12:20 PM > Subject: Re: [ceph-users] Tip of the week: don't use Intel 530 SSD's > for journals > My cluster is actually very fast without SSD drives. Thanks for the > advice! > Michael Kuriger > [email protected] > 818-649-7235 > MikeKuriger (IM) > On 11/25/14, 7:49 AM, "Mark Nelson" <[email protected]> wrote: > >On 11/25/2014 09:41 AM, Erik Logtenberg wrote: > >> If you are like me, you have the journals for your OSD's with > >> rotating > >> media stored separately on an SSD. If you are even more like me, > >> you > >> happen to use Intel 530 SSD's in some of your hosts. If so, please > >> do > >> check your S.M.A.R.T. statistics regularly, because these SSD's > >> really > >> can't cope with Ceph. > >> > >> Check out the media-wear graphs for the two Intel 530's in my > >> cluster. > >> As soon as those declining lines get down to 30% or so, they need > >> to be > >> replaced. That means less than half a year between purchase and > >> end-of-life :( > >> > >> Tip of the week, keep an eye on those statistics, don't let a > >> failing > >> SSD surprise you. > > > >This is really good advice, and it's not just the Intel 530s. Most > >consumer grade SSDs have pretty low write endurance. If you mostly > >are > >doing reads from your cluster you may be OK, but if you have even > >moderately high write workloads and you care about avoiding OSD > >downtime > >(which in a production cluster is pretty important though not > >usually > >100% critical), get high write endurance SSDs. > > > >Mark > > > >> > >> Erik. > >> > >> > >> > >> _______________________________________________ > >> ceph-users mailing list > >> [email protected] > >> > >>https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ceph.com_listin > >>fo.cgi_ceph-2Dusers-2Dceph.com&d=AAICAg&c=lXkdEK1PC7UK9oKA-BBSI8p1AamzLOS > >>ncm6Vfn0C_UQ&r=CSYA9OS6Qd7fQySI2LDvlQ&m=xAjtZHPapVvnusxPYRk6BsgVfaL1ZLDaT > >>ojJmuDFDpQ&s=F0CBA8T3LuTIhofIV4LGk-6CgC8KsPAu-7JgJ4jRm3I&e= > >> > > > >_______________________________________________ > >ceph-users mailing list > >[email protected] > >https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ceph.com_listinf > >o.cgi_ceph-2Dusers-2Dceph.com&d=AAICAg&c=lXkdEK1PC7UK9oKA-BBSI8p1AamzLOSnc > >m6Vfn0C_UQ&r=CSYA9OS6Qd7fQySI2LDvlQ&m=xAjtZHPapVvnusxPYRk6BsgVfaL1ZLDaTojJ > >muDFDpQ&s=F0CBA8T3LuTIhofIV4LGk-6CgC8KsPAu-7JgJ4jRm3I&e= > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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