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Allen Wittenauer updated HDFS-8248: ----------------------------------- Labels: BB2015-05-TBR (was: ) > Store INodeId instead of the INodeFile object in BlockInfoContiguous > -------------------------------------------------------------------- > > Key: HDFS-8248 > URL: https://issues.apache.org/jira/browse/HDFS-8248 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Haohui Mai > Assignee: Haohui Mai > Labels: BB2015-05-TBR > Attachments: HDFS-8248.000.patch, HDFS-8248.001.patch, > HDFS-8248.002.patch, HDFS-8248.003.patch > > > Currently the namespace and the block manager are tightly coupled together. > There are two couplings in terms of implementation: > 1. The {{BlockInfoContiguous}} stores a reference of the {{INodeFile}} that > owns the block, so that the block manager can look up the corresponding file > when replicating blocks, recovering from pipeline failures, etc. > 1. The {{INodeFile}} stores {{BlockInfoContiguous}} objects that the file > owns. > Decoupling the namespace and the block manager allows the BM to be separated > out from the Java heap or even as a standalone process. This jira proposes to > remove the first coupling by storing the id of the inode instead of the > object reference of {{INodeFile}} in the {{BlockInfoContiguous}} class. -- This message was sent by Atlassian JIRA (v6.3.4#6332)