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Posted to hdfs-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2009/07/28 19:07:14 UTC

[jira] Created: (HDFS-509) Redesisn DataNode volumeMap to include all types of Replicas

Redesisn DataNode volumeMap to include all types of Replicas
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                 Key: HDFS-509
                 URL: https://issues.apache.org/jira/browse/HDFS-509
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: data-node
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang
             Fix For: 0.21.0


With the new append design, replicas at a DataNode could be in one of the five states: Finalized, ReplicaBeingWritten, ReplicaWaitingToBeRecovered, ReplicaUnderRecovery, and Temporay. This jira is to
1. define the in-memory representation of these five types of replicas
2. define the on-disk representation of these replicas
2. redefine volumeMap to include all five types of replicas and remove ongoingCreates map.

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