Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: John Spray <john.spray@redhat.com>
This was sending lots of metadata ops to MDSs to persuade them to migrate some subtrees, but that was flaky. Use the shiny new rank pinning functionality instead. Signed-off-by: John Spray <john.spray@redhat.com>
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>