After going through:
https://de.slideshare.net/sageweil1/bluestore-a-new-storage-backend-for-ceph-one-year-in
I can already answer some of my own questions - notably, compaction should
happen slowly,
and there is high write amplification for SSDs, which could explain why our
SSDs in our MDS reach
Dear Cephalopodians,
in the benchmarks done with many files, I noted that our bottleneck was mainly
given by the MDS-SSD performance,
and notably, after deletion of the many files in CephFS, the RocksDB stayed
large and did not shrink.
Recreating an OSD from scratch and backfilling it, however,
