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https://issues.apache.org/jira/browse/HDFS-8453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-8453 started by Zhe Zhang.
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> Erasure coding: properly assign start offset for internal blocks in a block
> group
> ---------------------------------------------------------------------------------
>
> Key: HDFS-8453
> URL: https://issues.apache.org/jira/browse/HDFS-8453
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
>
> {{LocatedBlock#offset}} should indicate the "offset of the first byte of the
> block in the file". In a striped block group, we should properly assign this
> {{offset}} for internal blocks, so each internal block can be identified from
> a given offset.
> My current plan is to keep using {{bg.getStartOffset() + idxInBlockGroup *
> cellSize}} as the start offset for data blocks. For parity blocks, use {{-1 *
> (bg.getStartOffset() + idxInBlockGroup * cellSize)}}.
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