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https://issues.apache.org/jira/browse/HDFS-1214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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sam rash reassigned HDFS-1214:
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Assignee: sam rash
> hdfs client metadata cache
> --------------------------
>
> Key: HDFS-1214
> URL: https://issues.apache.org/jira/browse/HDFS-1214
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: hdfs client
> Reporter: Joydeep Sen Sarma
> Assignee: sam rash
>
> In some applications, latency is affected by the cost of making rpc calls to
> namenode to fetch metadata. the most obvious case are calls to fetch
> file/directory status. applications like hive like to make optimizations
> based on file size/number etc. - and for such optimizations - 'recent' status
> data (as opposed to most up-to-date) is acceptable. in such cases, a cache on
> the DFS client that transparently caches metadata would be greatly benefit
> applications.
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