On 8 May 2011 16:18, Martijn van Exel <m...@rtijn.org> wrote: > On Sun, May 8, 2011 at 4:47 PM, Grant Slater <openstreet...@firefishy.com> > wrote: >> >> The full DB reload into PG9 used approximately 1TB of the SSD write >> capacity of a rating of 60TB. Now that only diffs are being applied > > Does that mean that those drives are only certified / guaranteed for 60TB > worth of write operations?
Yes. It was a considered decision. SLC based SSD disks are an order of magnitude more expensive. The current write rate (since switching back to diffs) should be sufficent to last us a couple of years, by which time the tile server would already be out of capacity. The disk provides S.M.A.R.T. stats for write usage and reserve capacity, so we are able to keep an eye on things. In an unexpected fail scenario we would still be able to serve existing stale tiles. Regards Grant _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
