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https://issues.apache.org/jira/browse/HDFS-544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hairong Kuang updated HDFS-544:
-------------------------------
Attachment: datanodeOnDiskLayout.patch
This patch
1. changes the datanode on-disk layout. The directory "current" has two
subdirs: "finalized" has all finalized replicas and "rbw" has all replicas
being written to.
2. when datanode restarts, it reads replicas under "finalized" and add them to
the replicasMap as FinalizedReplica. It also reads replicas under "rbw" and
adds them to the replicasMap as ReplicaWaitingToBeRecovered with its length set
to be the number of bytes that match its crc.
> Add a "rbw" sub directory to DataNode data directory
> ----------------------------------------------------
>
> Key: HDFS-544
> URL: https://issues.apache.org/jira/browse/HDFS-544
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node
> Affects Versions: Append Branch
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: Append Branch
>
> Attachments: datanodeOnDiskLayout.patch
>
>
> Add a "rbw" sub directory to DataNode to persist RBW, RWR, and RUR replicas.
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