Ceph - How to migrate a pool from using 'straw' to 'straw2'?

Solution Verified - Updated -

Issue

  • Starting from RHCS hammer (0.94) onwards, Ceph Supports a new algorithm named straw2. Prior to RHCS luminous (3.x) the Crush buckets needed to be manually migrated in the CRUSH map from straw -> straw2, and re-injected back. There are newer commands that can be leveraged rather then manually updating the crush mapping.

Environment

  • Red Hat Ceph Storage

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