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https://issues.apache.org/jira/browse/HBASE-4683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13169979#comment-13169979
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Hudson commented on HBASE-4683:
-------------------------------
Integrated in HBase-0.92 #190 (See
[https://builds.apache.org/job/HBase-0.92/190/])
HBASE-4683 Always cache index and bloom blocks
jdcryans :
Files :
* /hbase/branches/0.92/CHANGES.txt
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockType.java
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/io/hfile/CacheConfig.java
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV1.java
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java
> Always cache index and bloom blocks
> -----------------------------------
>
> Key: HBASE-4683
> URL: https://issues.apache.org/jira/browse/HBASE-4683
> Project: HBase
> Issue Type: New Feature
> Reporter: Lars Hofhansl
> Assignee: Mikhail Bautin
> Priority: Minor
> Fix For: 0.92.0, 0.94.0
>
> Attachments: 0001-Cache-important-block-types.patch, 4683-v2.txt,
> 4683.txt, D807.1.patch, D807.2.patch, D807.3.patch, HBASE-4683-0.92-v2.patch,
> HBASE-4683-v3.patch
>
>
> This would add a new boolean config option: hfile.block.cache.datablocks
> Default would be true.
> Setting this to false allows HBase in a mode where only index blocks are
> cached, which is useful for analytical scenarios where a useful working set
> of the data cannot be expected to fit into the (aggregate) cache.
> This is the equivalent of setting cacheBlocks to false on all scans
> (including scans on behalf of gets).
> I would like to get a general feeling about what folks think about this.
> The change itself would be simple.
> Update (Mikhail): we probably don't need a new conf option. Instead, we will
> make index blocks cached by default.
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