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From "Ashish Singhi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12295) Prevent block eviction under us if reads are in progress from the BBs
Date Sun, 26 Jul 2015 13:00:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641958#comment-14641958
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Ashish Singhi commented on HBASE-12295:
---------------------------------------

[~ram_krish], this seems to have broke org.apache.hadoop.hbase.coprocessor.TestOpenTableInCoprocessor,
do you want to take a look ?

> Prevent block eviction under us if reads are in progress from the BBs
> ---------------------------------------------------------------------
>
>                 Key: HBASE-12295
>                 URL: https://issues.apache.org/jira/browse/HBASE-12295
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0
>
>         Attachments: HBASE-12295.pdf, HBASE-12295_1.patch, HBASE-12295_1.pdf, HBASE-12295_10.patch,
HBASE-12295_12.patch, HBASE-12295_14.patch, HBASE-12295_15.patch, HBASE-12295_16.patch, HBASE-12295_16.patch,
HBASE-12295_17.patch, HBASE-12295_18.patch, HBASE-12295_2.patch, HBASE-12295_21.patch, HBASE-12295_4.patch,
HBASE-12295_4.pdf, HBASE-12295_5.pdf, HBASE-12295_9.patch, HBASE-12295_addendum.patch, HBASE-12295_final.patch,
HBASE-12295_trunk.patch
>
>
> While we try to serve the reads from the BBs directly from the block cache, we need to
ensure that the blocks does not get evicted under us while reading.  This JIRA is to discuss
and implement a strategy for the same.



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