Brandon Li created HDFS-4489: -------------------------------- Summary: Use InodeID as as an identifier of a file in HDFS protocols and APIs Key: HDFS-4489 URL: https://issues.apache.org/jira/browse/HDFS-4489 Project: Hadoop HDFS Issue Type: Bug Components: namenode Reporter: Brandon Li Assignee: Brandon Li
The benefit of using InodeID to uniquely identify a file can be multiple folds. Here are a few of them: 1. uniquely identify a file cross rename, related JIRAs include HDFS-4258, HDFS-4437. 2. modification checks in tools like distcp. Since a file could have been replaced or renamed to, the file name and size combination is no t reliable, but the combination of file id and size is unique. 3. id based protocol support (e.g., NFS) 4. to make the pluggable block placement policy use fileid instead of filename (HDFS-385). -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira