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From "Mikhail Bautin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3857) Change the HFile Format
Date Mon, 01 Aug 2011 22:46:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13073880#comment-13073880

Mikhail Bautin commented on HBASE-3857:


Yes, you are right, TestReplication also failed with the patch applied while it did not fail
without the patch. The failure message was as follows:

java.lang.AssertionError: Waited too much time for queueFailover replication

Looking at my archive of unit test results for the trunk, TestReplication failure shows up
in 67 cases out of 291 total runs of the test suite, so I suspect it is a highly problematic
unit test. I will look into this a bit more.

However, my question is the following: with the extremely agile development process and a
non-trivial number of routine unit test failures in the trunk, what is the accepted approach
of testing new patches? How do people select the right revision to test their patch against?
Is it always the trunk, and are the existing unit test failures in the trunk ignored (which
is bad because this may mask new bugs), or is there a different approach?

> Change the HFile Format
> -----------------------
>                 Key: HBASE-3857
>                 URL: https://issues.apache.org/jira/browse/HBASE-3857
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.90.4
>            Reporter: Liyin Tang
>            Assignee: Mikhail Bautin
>         Attachments: 0001-review_hfile-v2-r1144693_2011-07-15_11_14_44.patch, 0001-review_hfile-v2-r1147350_2011-07-26_11_55_59.patch,
0001-review_hfile-v2-r1152122-2011_08_01_03_18_00.patch, hfile_format_v2_design_draft_0.1.pdf,
hfile_format_v2_design_draft_0.3.pdf, hfile_format_v2_design_draft_0.4.odt
> In order to support HBASE-3763 and HBASE-3856, we need to change the format of the HFile.
The new format proposal is attached here. Thanks for Mikhail Bautin for the documentation.

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