[ https://issues.apache.org/jira/browse/HDFS-5868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aaron T. Myers reassigned HDFS-5868: ------------------------------------ Assignee: Taylor, Buddy > Make hsync implementation pluggable > ----------------------------------- > > Key: HDFS-5868 > URL: https://issues.apache.org/jira/browse/HDFS-5868 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: datanode > Affects Versions: 2.2.0 > Reporter: Taylor, Buddy > Assignee: Taylor, Buddy > Fix For: 2.4.0 > > Attachments: HDFS-5868-branch-2.patch, HDFS-5868a-branch-2.patch, > HDFS-5868b-branch-2.patch > > > The current implementation of hsync in BlockReceiver only works if the output > streams are instances of FileOutputStream. Therefore, there is currently no > way for a FSDatasetSpi plugin to implement hsync if it is not using standard > OS files. > One possible solution is to push the implementation of hsync into the > ReplicaOutputStreams class. This class is constructed by the > ReplicaInPipeline which is constructed by the FSDatasetSpi plugin, therefore > it can be extended. Instead of directly calling sync on the output stream, > BlockReceiver would call ReplicaOutputStream.sync. The default > implementation of sync in ReplicaOutputStream would be the same as the > current implementation in BlockReceiver. -- This message was sent by Atlassian JIRA (v6.3.4#6332)