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https://issues.apache.org/jira/browse/HDFS-8543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14581265#comment-14581265
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Zhe Zhang commented on HDFS-8543:
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Thanks Walter for working on this! The main logic of
{{chooseExcessReplicates4Stripe}} looks reasonable.
# The name {{ExcessReplicates}} should be {{ExcessReplicas}}. It was originated
in trunk. I will file a separate JIRA to address.
# We could assert the type before casting:
{code}
BlockInfoStriped sblk = (BlockInfoStriped) storedBlock;
{code}
# It seems no value is ever inserted into {{used}}?
# {{dulplicated}} misspelled
# The 2 versions of {{chooseExcessReplicates}} should be _contiguous_ and
_striped_, instead of _replication_ and _stripe_.
Will review again when above issues are addressed, especially #3.
> Erasure Coding: processOverReplicatedBlock() handles striped block
> ------------------------------------------------------------------
>
> Key: HDFS-8543
> URL: https://issues.apache.org/jira/browse/HDFS-8543
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Walter Su
> Assignee: Walter Su
> Attachments: HDFS-8543-HDFS-7285.01.patch
>
>
> striped block group could be over replicated when: 1.dead DN comes back. 2.
> Balancer/Mover copies block before deletes it.
> This jira add logic for processOverReplicatedBlock() handling striped block
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