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https://issues.apache.org/jira/browse/HDFS-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270686#comment-13270686
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Uma Maheswara Rao G commented on HDFS-234:
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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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