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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17917) Use pread by default for all user scan
Date Thu, 27 Apr 2017 09:03:04 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Duo Zhang updated HBASE-17917:
------------------------------
    Attachment: HBASE-17917-v3.patch

Fix failed UTs.

For snapshot related test, the problem is that we use HFileLink so the way I used to get the
hfile name is incorrect.
For TestHFileBlock, now we do not support concurrent read without pread, so modified the test.
For TestIOFencing, I think it is known to be flaky. And with the reopening of StoreFile, it
is much easier to hit FileNotFoundException so I add a retry in the UT. It passed locally.

> Use pread by default for all user scan
> --------------------------------------
>
>                 Key: HBASE-17917
>                 URL: https://issues.apache.org/jira/browse/HBASE-17917
>             Project: HBase
>          Issue Type: Sub-task
>          Components: scan
>    Affects Versions: 2.0.0
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17917.patch, HBASE-17917-v1.patch, HBASE-17917-v2.patch, HBASE-17917-v2.patch,
HBASE-17917-v3.patch
>
>
> As said in the parent issue. We need some benchmark here first.



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