Rakesh R created HDFS-13166:
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Summary: [SPS]: Implement caching mechanism to keep LIVE datanodes
to minimize costly getLiveDatanodeStorageReport() calls
Key: HDFS-13166
URL: https://issues.apache.org/jira/browse/HDFS-13166
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Rakesh R
Assignee: Rakesh R
Presently {{#getLiveDatanodeStorageReport}} is fetched for every file and does
the computation. This task is to discuss and implement a cache mechanism to
minimize the number of function calls. Probably, we could define a configurable
refresh interval and periodically refresh the DN cache by fetching latest
{{#getLiveDatanodeStorageReport}}.
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