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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14643) Avoid Splits from once again opening a closed reader for fetching the first and last key
Date Wed, 21 Oct 2015 08:10:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14966412#comment-14966412
] 

Hudson commented on HBASE-14643:
--------------------------------

SUCCESS: Integrated in HBase-TRUNK #6934 (See [https://builds.apache.org/job/HBase-TRUNK/6934/])
HBASE-14643 - Avoid Splits from once again opening a closed reader for (ramkrishna: rev 6e3b7af0efced7351163a5011a44bfc18851fce0)
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java


> Avoid Splits from once again opening a closed reader for fetching the first and last
key
> ----------------------------------------------------------------------------------------
>
>                 Key: HBASE-14643
>                 URL: https://issues.apache.org/jira/browse/HBASE-14643
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: Heng Chen
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: HBASE-14643-branch-1.2.patch, HBASE-14643-branch-1.patch, HBASE-14643.patch,
HBASE-14643_v1.patch, HBASE-14643_v2.patch, HBASE-14643_v3.patch, HBASE-14643_v4.patch, HBASE-14643_v5.patch
>
>
> Currently split flow is such that we close the parent region and all its store file readers
are also closed.  After that inorder to split the reference files we need the first and last
keys for which once again open the readers on those store files.  This could be costlier operation
considering the fact that it has to contact the HDFS for this close and open operation. This
JIRA is to see if we can improve this.



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