large bucket index in multisite environement (how to deal with large omap objects warning)?

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Hi everybody,

we maintain three ceph clusters (2x octopus, 1x nautilus) that use three
zonegroups to sync metadata, without syncing the actual data (only one zone
per zonegroup).

Some customer got buckets with >4m objects in our largest cluster (the
other two a very fresh with close to 0 data in it)

How do I handle that in regards of the "Large OMAP objects" warning?
- Sharding is not an option, because it is a multisite environment (at
least thats what I read everywere)
- Limiting the customers is not a great option, because he already got that
huge amount of files in their buckets
- disabling the warning / increasing the threashold, is IMHO a bad option
(people might have put some thinking in that limit and having 40x the limit
is far off the "just roll with it" threashold)

I really hope that someone does have an answer, or maybe there is some
roadmap which addresses this issue.

Cheers
 Boris
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