I have a question about ceph cache pools as documented on this page:
Is the cache pool feature still considered a good idea? Reading some of
the email archives I find some discussion of how this caching is not
recommended anymore, for version=nautilus. Is that correct?
What is my use-case? We are using cephfs, and have a large cephfs pool
of HDD with some NVMe drives for bluestore WAL and DB. Total storage is
2.1 PB. Replication=3. There is also a separate metadata pool, as
required for cephfs.
We have a spare storage server with about 14 TB of NVME drives. Would it
be worthwhile to setup an NVMe cache pool for the main cephfs pool?
Center for Gravitation, Cosmology, and Astrophysics
University of Wisconsin-Milwaukee
office: +1 414 229 4960