Experimenting with Igor’s Bluestore WAL

Igor Fedetov is one of the most knowledgable developers working on Ceph. He’s started working on replacing our use of RocksDB’s write ahead log with a bluestore native implementation. After tuning we can achieve up to 122K random write IOPS on a single OSD! That’s nearly a 50% improvment over the current main branch and over twice as fast as Pacific!