Hi Manjunatha,

Please refer the below mapreduce program which as compression and decompression.

Compression

All compression algorithms exhibit a space/time trade-off i.e faster compression and decompression speeds usually come at the expense of smaller space savings.

Simplest program for compression.

In the above code there is no mapper and reducer.Notice the two lines which are doing the job of compression.Instead of defalte type any other compression format can be taken.


Decompression

Simplest program for decompression.


In the decompression code we are not using any special expression which is doing the job of compression.In fact we are not doing anything at all. But if you take a compressed file as in input file for above code an run it, it will decompress the file. Now the format in which the decompressed file is produced is just FILE.

For better understanding please refer the below link:



I hope this resolves your query.

Please let me know if you have any other query.