Kai Zheng created HDFS-9719:
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Summary: Refactoring ErasureCodingWorker into smaller reusable
constructs
Key: HDFS-9719
URL: https://issues.apache.org/jira/browse/HDFS-9719
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Kai Zheng
Assignee: Kai Zheng
This would suggest and refactor {{ErasureCodingWorker}} into smaller constructs
to be reused in other places like block group checksum computing in datanode
side. As discussed in HDFS-8430 and implemented in HDFS-9694 patch, checksum
computing for striped block groups would be distributed to datanode in the
group, where data block data should be able to be reconstructed when
missed/corrupted to recompute the block checksum. The most needed codes are in
the current ErasureCodingWorker and could be reused in order to avoid
duplication. Fortunately, we have very good and complete tests, which would
make the refactoring much easier. The refactoring will also help a lot for
subsequent tasks in phase II for non-striping erasure coded files and blocks.
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