Feilong He created HDFS-15337:
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Summary: Support available space choosing policy in HDFS
Persistent Memory Cache
Key: HDFS-15337
URL: https://issues.apache.org/jira/browse/HDFS-15337
Project: Hadoop HDFS
Issue Type: Improvement
Components: caching, datanode
Reporter: Feilong He
Assignee: Feilong He
In HDFS-13762, we introduced HDFS Persistent Memory Cache feature. In that
implementation, if more than one persistent memory volume is specified by user,
a simple round-robin policy is used to pick up a volume to cache data.
Evidently, the large difference of volume capacity can lead to imbalance issue.
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