Hi Dan, > -----Original Message----- > From: Dan van der Ster [mailto:dan@xxxxxxxxxxxxxx] > Sent: 17 May 2017 10:29 > To: Nick Fisk <nick@xxxxxxxxxx> > Cc: ceph-users <ceph-users@xxxxxxxxxxxxxx> > Subject: Re: Changing SSD Landscape > > I am currently pricing out some DCS3520's, for OSDs. Word is that the price is going up, but I don't have specifics, yet. > > I'm curious, does your real usage show that the 3500 series don't offer enough endurance? We've written about 700-800TB to each P3700 in about 10 months and their official specs show that they should be good for about 7PBW. We plan to try and keep these nodes running for about 5 years, so roughly about right I would imagine. Looking at the 3520's, I think by the time we have enough endurance, we would be talking about ones at the high end of the capacity scale. > > Here's one of our DCS3700's after 2.5 years of RBD + a bit of S3: > > Model Family: Intel 730 and DC S35x0/3610/3700 Series SSDs > Device Model: INTEL SSDSC2BA200G3 > Firmware Version: 5DV10270 > User Capacity: 200,049,647,616 bytes [200 GB] > > 9 Power_On_Hours 0x0032 100 100 000 Old_age > Always - 22580 > 226 Workld_Media_Wear_Indic 0x0032 100 100 000 Old_age > Always - 3471 > 228 Workload_Minutes 0x0032 100 100 000 Old_age > Always - 1354810 > 232 Available_Reservd_Space 0x0033 099 099 010 Pre-fail > Always - 0 > 233 Media_Wearout_Indicator 0x0032 097 097 000 Old_age > Always - 0 > 241 Host_Writes_32MiB 0x0032 100 100 000 Old_age > Always - 8236969 > 242 Host_Reads_32MiB 0x0032 100 100 000 Old_age > Always - 7400 > > Still loads of endurance left. > > Anyway, in a couple months we'll start testing the Optane drives. They are small and perhaps ideal journals, or? Ok, interesting. Is this the P4800 model? > > -- Dan > > > > On Wed, May 17, 2017 at 11:12 AM, Nick Fisk <nick@xxxxxxxxxx> wrote: > > Hi All, > > > > There seems to be a shift in enterprise SSD products to larger less > > write intensive products and generally costing more than what the > > existing P/S 3600/3700 ranges were. For example the new Intel NVME > > P4600 range seems to start at 2TB. Although I mention Intel products, > > this seems to be the general outlook across all manufacturers. This presents some problems for acquiring SSD's for Ceph > journal/WAL use if your cluster is largely write only and wouldn't benefit from using the extra capacity brought by these SSD's to use > as cache. > > > > Is anybody in the same situation and is struggling to find good P3700 400G replacements? > > > > Nick > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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