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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5189) Integration with BookKeeper logging system
Date Wed, 11 Feb 2009 20:19:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672754#action_12672754
] 

dhruba borthakur commented on HADOOP-5189:
------------------------------------------

> if the namenode adds entry x and later y, the bookkeeper client won't acknowledge y before
x to the namenode.

Also, does this mean that when the ledger is being read later on, x is guaranteed to appear
before y?



> Integration with BookKeeper logging system
> ------------------------------------------
>
>                 Key: HADOOP-5189
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5189
>             Project: Hadoop Core
>          Issue Type: New Feature
>    Affects Versions: 0.19.0
>            Reporter: Luca Telloli
>         Attachments: create.png, HADOOP-5189.patch
>
>
> BookKeeper is a system to reliably log streams of records (https://issues.apache.org/jira/browse/ZOOKEEPER-276).
The NameNode is a natural target for such a system for being the metadata repository of the
entire file system for HDFS. 

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