Lars George created HBASE-14556:
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Summary: Make prefetchOnOpen configurable for index and/or data
blocks
Key: HBASE-14556
URL: https://issues.apache.org/jira/browse/HBASE-14556
Project: HBase
Issue Type: Bug
Components: BlockCache, regionserver
Reporter: Lars George
This came up in user discussions. It would be great to add an extra option to
the {{CacheConfig}} that allows to specify what blocks are cached during
region/file opening. This should allows to set {{BlockIndexOnly}},
{{BloomFilterOnly}}, {{AllIndexesOnly}}, {{DataOnly}}, and {{AllBlocks}}.
For large datasets it is not viable to load all blocks into memory, but to
speed up access it still makes sense to prefetch the index blocks (being block
index and Bloom filter blocks).
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