I am playing with Ceph Luminous and getting confused information around
usage of WalDB vs RocksDB.
I have 2TB NVMe drive which I want to use for Wal/Rocks DB and have 5 2TB
SSD's for OSD.
I am planning to create 5 30GB partitions for RocksDB on NVMe drive, do I
need to create partitions of WalDB also on NVMe drive or does RocksDB does
same work as WalDB plus having metadata on it?
So my question is do I really need to use WalDB along with RocksDB or
having RocksDB only is fine?
wal should be on your fastest drive. If your fastest drive is nvme -
place it here.
You can't use bluestore without wal or db, it's not a toy.
k
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