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.

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
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