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From "Laurent Goujon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-10297) FileChecksum should provide getChecksumOpt method
Date Tue, 28 Jan 2014 05:09:37 GMT
Laurent Goujon created HADOOP-10297:

             Summary: FileChecksum should provide getChecksumOpt method
                 Key: HADOOP-10297
                 URL: https://issues.apache.org/jira/browse/HADOOP-10297
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Laurent Goujon

o.a.h.f.FileSystem has several methods which accepts directly or indirectly a ChecksumOpt
parameter to configure checksum options, but there's no generic way of querying checksum options
used for a given file.

MD5MD5CRC32FileChecksum used by DFSClient has a getChecksumOpt() but since not just DistributedFileSystem
is accepting a ChecksumOpt argument, but any FileSystem subclass (although only DistributedFileSystem
implements a specific behaviour), I suggest to make getChecksumOpt an abstract method of FileChecksum.
This could be used by tools like DistCp to replicate checksum options for example.

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