Yingjie Cao created FLINK-21790:
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Summary: Shuffle data directories to make data directory section
of different TaskManagers fairer
Key: FLINK-21790
URL: https://issues.apache.org/jira/browse/FLINK-21790
Project: Flink
Issue Type: Improvement
Components: Runtime / Network
Reporter: Yingjie Cao
Fix For: 1.13.0
Currently, different TaskManagers select data directory in the same order and
if there are multiple disk, some disks may stores more data than others which
is bad for performance. A simple improvement is that each TaskManager shuffles
the given data directories randomly and select the data directory in different
order.
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