Hi,
I have 4 osd nodes with 4 hdd and 1 ssd on each.
I'm gonna add these osds in an existing cluster.
What I'm confused is that how to deal with the ssd.
Can I deploy 4 osd with wal and db in one ssd partition such as:
# ceph-disk prepare --bluestore --block.db /dev/sdc --block.wal /dev/sdc /dev/sdd
# ceph-disk prepare --bluestore --block.db /dev/sdc --block.wal /dev/sdc /dev/sde
# ceph-disk prepare --bluestore --block.db /dev/sdc --block.wal /dev/sdc /dev/sdf
# ceph-disk prepare --bluestore --block.db /dev/sdc --block.wal /dev/sdc /dev/sdg
or should I place wal and db in seperate ssd partitions:
# ceph-disk prepare --bluestore --block.db /dev/sdc1 --block.wal /dev/sdc1 /dev/sdd
# ceph-disk prepare --bluestore --block.db /dev/sdc2 --block.wal /dev/sdc2 /dev/sde
# ceph-disk prepare --bluestore --block.db /dev/sdc3 --block.wal /dev/sdc3 /dev/sdf
# ceph-disk prepare --bluestore --block.db /dev/sdc4 --block.wal /dev/sdc4 /dev/sdg
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