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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6962) Upgrade hadoop 1 dependency to hadoop 1.1
Date Wed, 14 Nov 2012 01:26:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496736#comment-13496736

Lars Hofhansl commented on HBASE-6962:

While 0.94 can be build against Hadoop 1.1.0 the behavior will be the same.
There is a lot of confusion about append, sync, hsync, hflush. Let me try to clarify.

# HBase never needed append, but only the sync part of the 0.20 append branch.
# Until HDFS-744 Hadoop did not have any durable sync. hsync was identical to hflush
# When we talk about sync in HBase we always mean hflush (until HBASE-5954 is done, that is)

That means as far as this issue is concerned, you can safely switch to Hadoop 1.1.0.

(I tried to summarize this here: http://hadoop-hbase.blogspot.com/2012/05/hbase-hdfs-and-durable-sync.html)
> Upgrade hadoop 1 dependency to hadoop 1.1
> -----------------------------------------
>                 Key: HBASE-6962
>                 URL: https://issues.apache.org/jira/browse/HBASE-6962
>             Project: HBase
>          Issue Type: Bug
>         Environment: hadoop 1.1 contains multiple important fixes, including HDFS-3703
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 0.96.0
>         Attachments: 6962.txt

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