One of my OSDs crashed. Why?
Some OSDs are very slow. Why?
On some OSDs CPU usage is very high. Why?
I/O is pending or very slow despite no obvious bottleneck. Why?
Ceph status is HEALTH_WARN or HEALTH_ERROR. How to fix it? (or what are the common/potential situations that could cause HEALTH_ERROR or HEALTH_WARN)
How do you generally figure out/understand whether the configuration is a cluster is optimal for the workload?
What's scrubbing? How often does it happen? How do you change the interval?
Writes to RBD is slow. What causes it? How do you benchmark (rbd bench vs. dd)?
Utility of admin sockets or how can they be used for retrieving information?
How to stop the cluster safely? (both via juju and standard ways)
How to add a new OSD?
How to add a remove an OSD?
When is it safe to purge an OSD? (or what boxes need to be ticked before removing an OSD)

Provide feedback

Saved searches