stack created HBASE-11520:
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Summary: Simplify offheap cache config by removing the confusing
"hbase.bucketcache.percentage.in.combinedcache"
Key: HBASE-11520
URL: https://issues.apache.org/jira/browse/HBASE-11520
Project: HBase
Issue Type: Sub-task
Affects Versions: 0.99.0
Reporter: stack
Assignee: stack
Fix For: 0.99.0
Remove "hbase.bucketcache.percentage.in.combinedcache". It is unnecessary
complication of block cache config. Let L1 config setup be as it is whether a
L2 present or not, just set hfile.block.cache.size (not hbase.bucketcache.size
* (1.0 - hbase.bucketcache.percentage.in.combinedcache)). For L2, let
hbase.bucketcache.size be the actual size of the bucket cache, not
hbase.bucketcache.size * hbase.bucketcache.percentage.in.combinedcache.
Attached patch removes the config. and updates docs. Adds tests to confirm
configs are as expected whether a CombinedBlockCache deploy or a strict L1+L2
deploy.
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