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Posted to common-issues@hadoop.apache.org by "Laurent Goujon (JIRA)" <ji...@apache.org> on 2014/01/28 06:09:37 UTC

[jira] [Created] (HADOOP-10297) FileChecksum should provide getChecksumOpt method

Laurent Goujon created HADOOP-10297:
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             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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