>then list all objects (run find on the osds?) and then you just need to grep the OSDs for each prefix.
So, you advise to run find over ssh for all OSD hosts to traverse OSDs filesystems and find files (objects),
named with rbd prefix? Am I right? If so, I have two thoughts: (1) it may be not so fast also, because
even limiting find with rbd prefix and pool index, it have to recursively go through whole OSD filesytem
hierarchy. And (2) - find will put an additional load to OSD drives.
Given you know the PGs impacted, you would limit this find to only those PGs in question, which from what you have described is only 1. So figure out which OSDs are active for the PG, and run the find in the subdir for the placement group on one of those. It should run really fast unless you have tons of tiny objects in the PG.
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