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Posted to common-dev@hadoop.apache.org by "Lohit Vijayarenu (JIRA)" <ji...@apache.org> on 2013/09/20 22:46:54 UTC

[jira] [Created] (HADOOP-9985) HDFS Compatible ViewFileSystem

Lohit Vijayarenu created HADOOP-9985:
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             Summary: HDFS Compatible ViewFileSystem
                 Key: HADOOP-9985
                 URL: https://issues.apache.org/jira/browse/HADOOP-9985
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Lohit Vijayarenu
             Fix For: 2.0.6-alpha


There are multiple scripts and projects like pig, hive, elephantbird refer to HDFS URI as hdfs://namenodehostport/ or hdfs:/// . In federated namespace this causes problem because supported scheme for federation is viewfs:// . We will have to force all users to change their scripts/programs to be able to access federated cluster. 

It would be great if thee was a way to map viewfs scheme to hdfs scheme without exposing it to users. Opening this JIRA to get inputs from people who have thought about this in their clusters.

In our clusters we ended up created another class HDFSCompatibleViewFileSystem which hijacks both hdfs.fs.impl and viewfs.fs.impl and passes down filesystem calls to ViewFileSystem. Is there any suggested approach other than this?

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