Hi all, I'm testing some scenario's with the new Ceph luminous/bluestore combination.
I've created a demo setup with 3 nodes (each has 10 HDD's and 2 SSD's) So i created 10 BlueStore OSD's with a seperate 20GB block.db on the SSD's (5 HDD's per block.db SSD). I'm testing a failure of one of those SSD's (block.db failure). With filestore i have used the following blog/script to recover from a journal SSD failure: http://ceph.com/no-category/ceph-recover-osds-after-ssd-journal-failure/ I tried to adapt the script to bluestore but i couldn't find any BlueStore equivalent to the following command (where the journal is re-created): sudo ceph-osd –mkjournal -i $osd_id Tracing the 'ceph-disk prepare' command didn't result in a seperate command that the BlueStore block.db is initialized. It looks like the --mkfs switch does all the work (including the data part). Am i correct? Is there any way a seperate block.db can be initialized after the OSD was created? In other words: is it possible to recover from a block.db failure or do i need to start over? block.db is probably no equivalent to a FileStore's journal, but what about block.wal? If i use a seperate block.wal device only will the --mkjournal command re-initialize that or is the --mkjournal command only used for FileStore ? Kind regards and thanks in advance for any reply, Caspar Smit _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
