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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-234) Integration with BookKeeper logging system
Date Tue, 08 May 2012 18:29:50 GMT

    [ https://issues.apache.org/jira/browse/HDFS-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270686#comment-13270686

Uma Maheswara Rao G commented on HDFS-234:

Hi Todd,
  As this is also one option for HA, we are working on this patch merged to Hadoop-2 internally
and we are testing with BookKeeper. Also this is a contrib part in HDFS. As this is a pluggable
option, why can't we keep this in contrib? If we have other options ready and performing well,
then we can choose one among, as you mentioned in other discussions.

I have seen the comment from Dhruba for continue invest on BK based approach also. https://issues.apache.org/jira/browse/HDFS-3092?focusedCommentId=13265110&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13265110
Since the basic thing ready from BKJM side, it will help some users for evaluating it as this
is an alpha quality release. Identified some issues like HDFS-3058 in our testing also. Infact
we have to push this also in.

Regarding document: I agree, we may have to prepare well documentation for using this option,
currently it is available only in BKJM class.

> Integration with BookKeeper logging system
> ------------------------------------------
>                 Key: HDFS-234
>                 URL: https://issues.apache.org/jira/browse/HDFS-234
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Luca Telloli
>            Assignee: Ivan Kelly
>             Fix For: 3.0.0
>         Attachments: HADOOP-5189-trunk-preview.patch, HADOOP-5189-trunk-preview.patch,
HADOOP-5189-trunk-preview.patch, HADOOP-5189-v.19.patch, HADOOP-5189.patch, HDFS-234-branch-2.patch,
HDFS-234.diff, HDFS-234.diff, HDFS-234.diff, HDFS-234.diff, HDFS-234.diff, HDFS-234.patch,
create.png, hdfs_tpt_lat.pdf, zookeeper-dev-bookkeeper.jar, zookeeper-dev.jar
> 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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