Metadata vs UserData caching in BlueStore

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Sage et al,

shouldn't we have bluestore_cache_metadata_ratio set to 1 by default? To concentrate on metadata caching..

IMHO Onode caching is much more important and profitable than user data one. It's rather a client misbehavior to cause cache hit when accessing user data but it's highly expected for onode metadata.

Moreover user data caching is probably already exists at block device level hence we rather duplicate disk cache....

What do you think?

Thanks,

Igor

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