dragon created HDFS-9995:
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Summary: CLONE - Erasure coding: use BlockInfo[] for both striped
and contiguous blocks in INodeFile
Key: HDFS-9995
URL: https://issues.apache.org/jira/browse/HDFS-9995
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: HDFS-7285
Reporter: dragon
Assignee: Zhe Zhang
Fix For: HDFS-7285
This JIRA is to use {{BlockInfo[] blocks}} for both striped and contiguous
blocks in INodeFile.
Currently {{FileWithStripedBlocksFeature}} keeps separate list for striped
blocks, and the methods there duplicate with those in INodeFile, and current
code need to judge {{isStriped}} then do different things. Also if file is
striped, the {{blocks}} in INodeFile occupy a reference memory space.
These are not necessary, and we can use the same {{blocks}} to make code more
clear.
I keep {{FileWithStripedBlocksFeature}} as empty for follow use: I will file a
new JIRA to move {{dataBlockNum}} and {{parityBlockNum}} from
*BlockInfoStriped* to INodeFile, since ideally they are the same for all
striped blocks in a file, and store them in block will waste NN memory.
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