Elliott Clark created HBASE-15316:
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Summary: Add the ability to cache ROOT_INDEX on reads only
Key: HBASE-15316
URL: https://issues.apache.org/jira/browse/HBASE-15316
Project: HBase
Issue Type: Bug
Reporter: Elliott Clark
For larger data sets it's sometimes not needed to fit the entire index in
memory ( there can be cold spots in the data, too much data in index, etc).
However it's almost always needed to cache the root index. It's always the
hottest blocks of the entire region.
We should allow the root index block to be cached in memory on write. We should
also do that by default.
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