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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 17:32:24 GMT

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

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

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Thanks for the contribution, [~arshak]! I removed some trailing whitespace, but otherwise,
it applied cleanly.

> 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
>          Components: docs
>    Affects Versions: 1.5.0
>            Reporter: Arshak Navruzyan
>            Assignee: Arshak Navruzyan
>            Priority: Minor
>             Fix For: 1.5.1, 1.6.0
>
>         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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