Jing Zhao created HDFS-8760:
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Summary: Erasure Coding: reuse BlockReader when reading the same
block in pread
Key: HDFS-8760
URL: https://issues.apache.org/jira/browse/HDFS-8760
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently in pread, we create a new block reader for each aligned stripe even
though these stripes belong to the same block. It's better to reuse them to
avoid unnecessary block reader creation overhead. This can also avoid reading
from the same bad DataNode.
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