Daryn Sharp created HDFS-14531:
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Summary: Datanode's ScanInfo requires excessive memory
Key: HDFS-14531
URL: https://issues.apache.org/jira/browse/HDFS-14531
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Affects Versions: 2.0.0-alpha
Reporter: Daryn Sharp
Attachments: Screen Shot 2019-05-31 at 12.25.54 PM.png
The DirectoryScanner's ScanInfo map consumes ~4.5X memory as replicas as the
replica map. For 1.1M replicas: the replica map is ~91M while the scan info is
~405M.
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