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https://issues.apache.org/jira/browse/ACCUMULO-578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Newton updated ACCUMULO-578:
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Attachment: (was: comparison.png)
> consider using hdfs for the walog
> ---------------------------------
>
> Key: ACCUMULO-578
> URL: https://issues.apache.org/jira/browse/ACCUMULO-578
> Project: Accumulo
> Issue Type: Improvement
> Components: logger, tserver
> Affects Versions: 1.5.0-SNAPSHOT
> Reporter: Eric Newton
> Assignee: Eric Newton
>
> Using HDFS for walogs would fix:
> * ACCUMULO-84: any node can read the replicated files
> * ACCUMULO-558: wouldn't need to monitor loggers
> * ACCUMULO-544: log references wouldn't include hostnames
> * ACCUMULO-423: wouldn't need to monitor loggers
> * ACCUMULO-258: hdfs has load balancing already
> To implement it, we would need the ability to distribute log sorts.
> Continuing to use loggers helps us avoid:
> * hdfs pipeline strategy
> * we don't have fine-grained insight when a single node makes dfs slow
> * additional namenode pressure
> * flexibility: for example, we can add fadvise() calls to the logger before
> HDFS supports it
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