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https://issues.apache.org/jira/browse/HADOOP-3860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12618440#action_12618440
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Allen Wittenauer commented on HADOOP-3860:
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NFS is a black art: when doing benchmarks such as these, implementation
matters. Are we using NFSv2? v3? v4? UDP or TCP? What is the rwsize set to?
What is the server side and what is the client side? What about TCP/IP tuning?
> Compare name-node performance when journaling is performed into local
> hard-drives or nfs.
> -----------------------------------------------------------------------------------------
>
> Key: HADOOP-3860
> URL: https://issues.apache.org/jira/browse/HADOOP-3860
> Project: Hadoop Core
> Issue Type: Improvement
> Affects Versions: 0.19.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Fix For: 0.19.0
>
> Attachments: NNThruputMoreOps.patch
>
>
> The goal of this issue is to measure how the name-node performance depends on
> where the edits log is written to.
> Three types of the journal storage should be evaluated:
> # local hard drive;
> # remote drive mounted via nfs;
> # nfs filer.
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