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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-10058) Test for HBASE-9915 (avoid reading index blocks)
Date Fri, 29 Nov 2013 23:01:35 GMT

     [ https://issues.apache.org/jira/browse/HBASE-10058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl updated HBASE-10058:
----------------------------------

    Description: 
In HBASE-9915 we found that for encoded blocks the quick check whether the seek key falls
on the current block did not work.

This adds a unittest so we won't regress. The test counts the number of blocks accessed (real
data/index block in 0.94 and cache hits in trunk). Without HBASE-9915 we see about 50% more
blocks hit in this test.


  was:
Was just trying to write a unit test to make sure we won't regress on HBASE-9915 in the future
and found the dataBlockReadCnt metric is not correctly updated for encoded blocks (type is
ENCODED_DATA as opposed to DATA).



> Test for HBASE-9915 (avoid reading index blocks)
> ------------------------------------------------
>
>                 Key: HBASE-10058
>                 URL: https://issues.apache.org/jira/browse/HBASE-10058
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.94.15
>
>         Attachments: 10058-0.94.txt, 10058-trunk.txt
>
>
> In HBASE-9915 we found that for encoded blocks the quick check whether the seek key falls
on the current block did not work.
> This adds a unittest so we won't regress. The test counts the number of blocks accessed
(real data/index block in 0.94 and cache hits in trunk). Without HBASE-9915 we see about 50%
more blocks hit in this test.



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