Hi, it looks like the beloved Samsung SM/PM863a is no longer available and the replacement is the new SM/PM883.
We got an 960GB PM883 (MZ7LH960HAJR-00005) here and I ran the usual fio benchmark... and got horrible results :( fio --filename=/dev/sdX --direct=1 --sync=1 --rw=write --bs=4k --numjobs=1 --iodepth=1 --runtime=60 --time_based --group_reporting --name=journal-test 1 thread - 1150 iops 4 threads - 2305 iops 8 threads - 4200 iops 16 threads - 7230 iops Now that's a factor of 15 or so slower than the PM863a. Someone here reports better results with a 883: https://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/ Maybe there's a difference between the SM and PM variant of these new disks for performance? (This wasn't the case for the 863a) Does anyone else have these new 883 disks yet? Any experience reports? Paul _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
