Hi all I want to study the effect of bluestore rocksdb compression on ceph and whether it is necessary to optimize it. But currently, bluestore rocksdb compression is disabled by default in ceph. I simply replaced the rocksdb compression algorithm, and then performed a 4KB rand read fio test, but the test results are not different. So I would like to ask you, is there any scenario where rocksdb needs to be compressed in ceph, and if so, what type of test is used to better demonstrate the impact of rocksdb compression on the upper layer of ceph. // create 10GB image ceph osd pool create rbd 128 rbd pool init rbd rbd create --size 10240 --image rbd/image --image-format 2 --thick-provision //fio [global] ioengine=rbd iodepth=128 rw=randwrite bs=4KB time_based=1 ramp_time=60s runtime=300s clientname=admin pool=rbd group_reporting buffer_compress_percentage=80 refill_buffers buffer_pattern=0xdeadbeef [volumes] rbdname=image numjobs=1 Thanks -Hualong