The codec classname is serialized into a sequence file itself. You can detect the codec of a SequenceFile, using its Reader: http://hadoop.apache.org/common/docs/r0.20.2/api/org/apache/hadoop/io/SequenceFile.Reader.html#getCompressionCodec()
Or non-programmatically by viewing the header of the file (cat first hundred bytes or so), and finding the pattern "org.apache.hadoop.io.compress" in the stream printed. On Tue, Jun 26, 2012 at 3:55 AM, Mohit Anchlia <mohitanch...@gmail.com> wrote: > Is there a way to look at the sequence file or a block report to see which > compression is being used? -- Harsh J
