Hi, all:
  If the Ceph cluster health status is HEALTH_OK, the execution time of 'sudo 
rbd ls rbd' is very short, like the following results.
$ time sudo rbd ls rbd
real    0m0.096s
user    0m0.014s
sys     0m0.028s

  But if there are several warnings (eg: 1 pgs degraded; 6 pgs incomplete; 1650 
pgs peering; 7 pgs stale;), the execution time of 'sudo rbd ls rbd' may take a 
long time.

Is there any way to improve the response time of 'rbd' commands?
Any help would be much appreciated.

Best Regards,
WD Hwang

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