AvroStorage compression ratio

[Thejas Nair]

Based on AvroStorage code and documentation, it looks like compression 
is enabled by default, codec set to "deflate". But the file size is 
almost same as that of uncompressed tab separated text data.

This is probably a bug in AvroStorage, but I wanted to check if this is 
somehow expected, before I open a jira to track it.

Uncompressed txt     2.12 GB
avro (default compression)    2.09 GB
avro + snappy compression     2.09 GB
lzo compressed txt      0.69 GB


Thanks,
Thejas