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https://issues.apache.org/jira/browse/HBASE-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell resolved HBASE-14556.
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Resolution: Incomplete
> 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
> Priority: Major
>
> 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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