Mingliang Liu created HDFS-9442: ----------------------------------- Summary: Move block replication logic from BlockManager to a new class ReplicationManager Key: HDFS-9442 URL: https://issues.apache.org/jira/browse/HDFS-9442 Project: Hadoop HDFS Issue Type: Sub-task Components: namenode Reporter: Mingliang Liu Assignee: Mingliang Liu
Currently the {{BlockManager}} is managing all replication logic for over- , under- and mis-replicated blocks. This jira proposes to move that code to a new class named {{ReplicationManager}} for cleaner code logic, shorter source files, and easier lock separating work in future. The {{ReplicationManager}} is a package local class, providing {{BlockManager}} with methods that accesses its internal data structures of replication queue. Meanwhile, the class maintains the lifecycle of {{replicationThread}} and {{replicationQueuesInitializer}} daemon. -- This message was sent by Atlassian JIRA (v6.3.4#6332)