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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-2223) minor corrections to 1.5 documentation regarding WAL
Date Mon, 20 Jan 2014 16:57:21 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Elser updated ACCUMULO-2223:
---------------------------------

    Affects Version/s:     (was: 1.6.1)
                           (was: 1.7.0)
                           (was: 1.5.1)
                           (was: 1.6.0)

> minor corrections to 1.5 documentation regarding WAL
> ----------------------------------------------------
>
>                 Key: ACCUMULO-2223
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2223
>             Project: Accumulo
>          Issue Type: Improvement
>    Affects Versions: 1.5.0
>            Reporter: Arshak Navruzyan
>            Assignee: Arshak Navruzyan
>            Priority: Minor
>             Fix For: 1.5.1
>
>         Attachments: ACCUMULO-2223.patch
>
>
> A few paragraphs in the documentation suggest that the WAL is created locally and only
copied to HDFS for/during recovery. 
> 2.8. Fault-Tolerance
> The Master will coordinate the copying of write-ahead logs to HDFS so the logs are available
to all tablet servers.
> 11.10. Recovery
> Recovery is performed by asking the loggers to copy their write-ahead logs into HDFS.
As the logs are copied, they are also sorted, so that tablets can easily find their missing
updates. The copy/sort status of each file is displayed on Accumulo monitor status page. 



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