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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4683) Always cache index and bloom blocks
Date Fri, 16 Dec 2011 05:03:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13170773#comment-13170773
] 

Hudson commented on HBASE-4683:
-------------------------------

Integrated in HBase-TRUNK-security #33 (See [https://builds.apache.org/job/HBase-TRUNK-security/33/])
    HBASE-4683  Always cache index and bloom blocks

jdcryans : 
Files : 
* /hbase/trunk/CHANGES.txt
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/AbstractHFileWriter.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/CacheConfig.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlock.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV1.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterV2.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/metrics/SchemaConfigured.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/metrics/SchemaMetrics.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/CreateRandomStoreFile.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiColumnScanner.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanWithBloomError.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestSeekOptimizations.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/metrics/TestSchemaConfigured.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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