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From "Flavio Junqueira (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-2315) BookKeeper for write-ahead logging
Date Mon, 25 Jun 2012 20:38:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400864#comment-13400864
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Flavio Junqueira commented on HBASE-2315:
-----------------------------------------

If I understand Jesse's proposal, the idea is to have a WAL interface and essentially bring
all hdfs dependent WAL code under FsWAL? We would then implement an equivalent BkWAL for a
BookKeeper backend? 

I didn't understand the point about the HLog class being relatively well encapsulated, Jonathan.
Do you mean to say that it would be relatively easy to implement FsWAL by using HLog?


                
> BookKeeper for write-ahead logging
> ----------------------------------
>
>                 Key: HBASE-2315
>                 URL: https://issues.apache.org/jira/browse/HBASE-2315
>             Project: HBase
>          Issue Type: New Feature
>          Components: regionserver
>            Reporter: Flavio Junqueira
>         Attachments: HBASE-2315.patch, bookkeeperOverview.pdf, zookeeper-dev-bookkeeper.jar
>
>
> BookKeeper, a contrib of the ZooKeeper project, is a fault tolerant and high throughput
write-ahead logging service. This issue provides an implementation of write-ahead logging
for hbase using BookKeeper. Apart from expected throughput improvements, BookKeeper also has
stronger durability guarantees compared to the implementation currently used by hbase.

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