report statistics for ceph daemons
~# ./cephstat -d
osd.64
osd.75
osd.74
osd.73
osd.72
It scans local /var/lib/ceph/* for daemon admin sockets.
You may change path with -p option.
~# ./cephstat osd.64
op_w op_r op_w_in_bytes op_r_out_bytes op_w_latency op_r_latency
33 129 8389188 6407682 0.00112 0.00030
144 62 4277248 137509 0.00056 0.00025
3 64 0 81944 0.00038 0.00056
32 512 428195 1093121 0.00046 0.00042
^C~#
~# ./cephstat osd.64 -l
initial_latency
journal_queue_bytes
waitremoterecoveryreserved_latency
queue_len
stat_bytes_avail
op_w_prepare_latency
repwaitbackfillreserved_latency
tier_proxy_read
journal_bytes
subop_w_latency
tier_whiteout
...
~# ./cephstat osd.64 -m op_r_prepare_latency
op_r_prepare_latency
0.00066
0.00050
0.00073
^C~#