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Posted to notifications@accumulo.apache.org by "Arshak Navruzyan (JIRA)" <ji...@apache.org> on 2014/01/19 19:44:19 UTC
[jira] [Updated] (ACCUMULO-2223) minor corrections to 1.5
documentation regarding WAL
[ https://issues.apache.org/jira/browse/ACCUMULO-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arshak Navruzyan updated ACCUMULO-2223:
---------------------------------------
Status: Patch Available (was: Open)
> 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, 1.5.1, 1.6.0, 1.6.1, 1.7.0
> 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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