Scale in a ZCE-X Ceph storage cluster

Applicable scenario

• Product: ZCF
• Component: ZCE-X
• Version: 5.2.x
• Trigger: Distributed storage capacity must be reduced by removing planned data disks.

Symptoms

• The storage environment requires data-disk scale-in.
• Scale-in triggers data rebalancing.
• An incorrect sequence can cause I/O jitter, performance degradation, or more serious data risk.

Determination method

1. Confirm ceph -s is healthy before scale-in.