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https://issues.apache.org/jira/browse/HDFS-8120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14491963#comment-14491963
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Li Bo commented on HDFS-8120:
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Thanks Zhe for the bug fixing.
Does {{cellsInStripe}} mean the number of cells in a block? Otherwise it’s
duplicated with {{dataBlocks}}. I think we can use a more clear name such as
{{stripesInFullBlockGroup}}.
{{blockSize = cellSize * cellsInStripe*dataBlocks}} , it seems {{blockSize}} is
the size of block group. I think we don’t need to multiple {{dataBlocks}}.
Originally I set the block size to 8M. If this is too big for an unit test, we
can decrease the size. But 2 * 256 is a little smaller, it makes
{{TestFileMoreThanStripes2()}} testing a file that is bigger than a block
group. I think we can use 4 stripes in a block group.
> Erasure coding: created util class to analyze striped block groups
> ------------------------------------------------------------------
>
> Key: HDFS-8120
> URL: https://issues.apache.org/jira/browse/HDFS-8120
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
> Attachments: HDFS-8120.000.patch, HDFS-8120.001.patch
>
>
> The patch adds logic of calculating size of individual blocks in a striped
> block group.
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