Kota-SH commented on PR #5525:
URL: https://github.com/apache/hbase/pull/5525#issuecomment-1836612742
@Apache9 - Thanks for the review.
> What will happen if the region is moved back while we are cleaning its
blocks in block cache?
As of now, we check the region state before calling
evictBlocksByHfileName() method in uncacheStaleBlocks(). So we only evict
blocks if the region state isClosed/isClosing. If the region is moved back, it
will be in a different state, and we do not evict its blocks.
> What about other types of BlockCache?
Currently, we only support BucketCache and CombinedBlockCache. We can
extend this feature to other types of block cache if required. I can create a
separate jira to handle those scenarios.
> I prefer here we pass an interface / If we do not clean any blocks, just
return an empty map?
Yes, we pass an empty map if we don't evict any blocks. I made the
change to pass an Interface in a separate PR to the master branch
(https://github.com/apache/hbase/pull/5492). Could you please review it there?
Thanks,
Shanmukha K
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