[jira] Resolved: (HBASE-887) Fix a hotspot in scanners

["Jean-Daniel Cryans (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jean-Daniel Cryans resolved HBASE-887.
--------------------------------------

    Resolution: Fixed

Committed to trunk.

SVN comments: 
{code}
HBASE-887 Fix a hotspot in scanners
M    conf/hbase-default.xml
Added a new config hbase.client.scanner.caching, fixed triplification
M    src/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
Implements new next(long, int) method for batching
M    src/java/org/apache/hadoop/hbase/ipc/HRegionInterface.java
Defines that new next(long, int) method
M    src/java/org/apache/hadoop/hbase/client/HTable.java
Adds new property that is passed to scanners. ClientScanner now handles caching of rows
M    src/java/org/apache/hadoop/hbase/client/MetaScanner.java
Small changes related to ScannerCallable
M    src/java/org/apache/hadoop/hbase/client/HConnectionManager.java
Same sort of small changes
M    src/java/org/apache/hadoop/hbase/client/ScannerCallable.java
Now modified because of new methods in HRS, will be able to handle caching
M    src/java/org/apache/hadoop/hbase/client/transactional/TransactionalTable.java
Passes caching to its super class
{code}

> Fix a hotspot in scanners
> -------------------------
>
>                 Key: HBASE-887
>                 URL: https://issues.apache.org/jira/browse/HBASE-887
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: client, regionserver
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.19.0
>
>         Attachments: 877-chart.jpg, hbase-887-v1.patch
>
>
> When scanning, we do a lot of RPCs and this has a huge performance hit. I propose that we add a way to fetch more rows during next() and put them in cache. This should be configurable.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.