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https://issues.apache.org/jira/browse/HDFS-16757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852042#comment-17852042
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ASF GitHub Bot commented on HDFS-16757:
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LiuGuH commented on PR #5719:
URL: https://github.com/apache/hadoop/pull/5719#issuecomment-2147469940
Hello ,sirs . For some reason, I now work with fastcopy and current
progerss is that I now already finished fastcopy tools in standalone mode. Both
replicated files and EC files are supported. And next is trying to finish
distcp with fastcopy.
@haiyang1987 , are you still work on this ? If not ,I hope to finish the
rest of the work. Thanks you.
And @ZanderXu @ayushtkn @Hexiaoqiao Sirs, can we continue to push this
mission forward? FastCopy is more efficient
for data replication in a single hdfs cluster or a federation hdfs cluter
with more nameservices. Thanks!
> Add a new method copyBlockCrossNamespace to DataNode
> ----------------------------------------------------
>
> Key: HDFS-16757
> URL: https://issues.apache.org/jira/browse/HDFS-16757
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: ZanderXu
> Assignee: Haiyang Hu
> Priority: Minor
> Labels: pull-request-available
>
> Add a new method copyBlockCrossNamespace in DataTransferProtocol at the
> DataNode Side.
> This method will copy a source block from one namespace to a target block
> from a different namespace. If the target DN is the same with the current DN,
> this method will copy the block via HardLink. If the target DN is different
> with the current DN, this method will copy the block via TransferBlock.
> This method will contains some parameters:
> * ExtendedBlock sourceBlock
> * Token<BlockTokenIdentifier> sourceBlockToken
> * ExtendedBlock targetBlock
> * Token<BlockTokenIdentifier> targetBlockToken
> * DatanodeInfo targetDN
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