Those are interesting numbers - can you rerun the test with write cache enabled this time? I wonder how much your drop will be…
thanks Jan > On 18 Jun 2015, at 17:48, Jelle de Jong <[email protected]> wrote: > > Hello everybody, > > I thought I would share the benchmarks from these four ssd's I tested > (see attachment) > > I do still have some question: > > #1 * Data Set Management TRIM supported (limit 1 block) > vs > * Data Set Management TRIM supported (limit 8 blocks) > and how this effects Ceph and also how can I test if TRIM is actually > working and not corruption data. > > #2 are there other things I should test to compare ssd's for Ceph Journals > > #3 are the power loss security mechanisms on SSD relevant in Ceph when > configured in a way that a full node can fully die and that a power loss > of all nodes at the same time should not be possible (or has an extreme > low probability) > > #4 how to benchmarks the OSD (disk+ssd-journal) combination so I can > compare them. > > I got some other benchmarks question, but I will make an separate mail > for them. > > Kind regards, > > Jelle de Jong > <setup-ceph01-ceph-ssd-benchmark.txt>_______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
