CRC computation and reading should move into a nested FileSystem
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Key: HADOOP-746
URL: http://issues.apache.org/jira/browse/HADOOP-746
Project: Hadoop
Issue Type: Improvement
Components: fs
Affects Versions: 0.8.0
Reporter: Owen O'Malley
Assigned To: Owen O'Malley
Currently FileSystem provides both an interface and a mechanism for computing
and checking crc files. I propose splitting the crc code into a nestable
FileSystem that like the PhasedFileSystem has a backing FileSystem. Once the
Paths are converted to URI, this is fairly natural to express. To use crc
files, your uris will look like:
crc://hdfs:%2f%2fhost1:8020/ which is a crc FileSystem with an underlying file
system of hdfs://host1:8020
This will allow users to use crc files where they make sense for their
application/cluster and get rid of the "raw" methods.
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