zhihai xu created YARN-6396:
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Summary: Call verifyAndCreateRemoteLogDir at service
initialization instead of application initialization to decrease load for name
node
Key: YARN-6396
URL: https://issues.apache.org/jira/browse/YARN-6396
Project: Hadoop YARN
Issue Type: Improvement
Components: log-aggregation
Affects Versions: 3.0.0-alpha2
Reporter: zhihai xu
Assignee: zhihai xu
Priority: Minor
Call verifyAndCreateRemoteLogDir at service initialization instead of
application initialization to decrease load for name node.
Currently for every application at each Node, verifyAndCreateRemoteLogDir will
be called before doing log aggregation, This will be a non trivial overhead for
name node in a large cluster since verifyAndCreateRemoteLogDir calls
getFileStatus. Once the remote log directory is created successfully, it is not
necessary to call it again. It will be better to call
verifyAndCreateRemoteLogDir at LogAggregationService service initialization.
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