The rbd export-diff / import-diff commands are very slow during transfers even when the 'rbd-concurrent-management-ops' option is increased

Solution Unverified - Updated -

Issue

  • When transferring large amounts of data from one rbd to another using the rbd export-diff and rbd import-diff commands very slow transfer speeds are observed.
  • Modifying the rbd-concurrent-management-ops option does not improve the behavior.

Environment

  • Red Hat Ceph Storage 1.3+

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