Scrub and collection_list() order

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Sage,

Does any code depend on collection_list returning snapshots BEFORE head/snapdir? I'm trying to improve scrub's overhead per osd_scrub_chunk_max of objects, but scrub for to do the snapshot consistency analysis it needs the head objects first. Can we add a collection_list() that returns the objects in completely reverse order? Or can it be changed to return head/snapdir objects before the snapshots? The current code has to ignore osd_scrub_chunk_max in order to find a natural boundary so that the scrub code can go in reverse order for that segment.

David

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