On Wed, May 17, 2017 at 11:29 AM, Dan van der Ster <d...@vanderster.com> wrote: > 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? > > 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.
Err... scratch that .... math fail. Yes, there is enough endurance left on this S3700. But 8236969*32MiB = 276TB which is already getting too much for a S35x0 series. Cheers, Dan > > Anyway, in a couple months we'll start testing the Optane drives. They > are small and perhaps ideal journals, or? > > -- Dan > > > > On Wed, May 17, 2017 at 11:12 AM, Nick Fisk <n...@fisk.me.uk> 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@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
