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From "Heng Chen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14643) Avoid Splits from once again opening a closed reader for fetching the first and last key
Date Mon, 19 Oct 2015 16:25:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Heng Chen updated HBASE-14643:
------------------------------
    Attachment: HBASE-14643.patch

Simple patch for this issue.  

> 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
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE-14643.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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