CEPH performance monitoring

ceph -s
ceph -w
ceph df
ceph osd df tree

rados df

ceph iostat
 
ceph osd perf
 
rbd perf image iostat  # and wait 30 sec
rbd perf image iotop   # and wait 30 sec
 
rbd du

https://ceph.io/community/new-mimic-iostat-plugin/

ceph osd pool create test
rados -p test bench 10 write --no-cleanup
rados -p test bench 10 seq
rados -p test bench -t 4 10 seq
rados -p test bench 10 rand
rados -p test cleanup

https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/1.3/html/administration_guide/benchmarking_performance#block_device