[jira] [Created] (HDFS-9995) CLONE - Erasure coding: use BlockInfo[] for both striped and contiguous blocks in INodeFile

["dragon (JIRA)" <ji...@apache.org>]

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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