Adding stream transformation
Compressing the data stream.
This scenario extends scenario 1 by transforming the backup data stream before it is written into the backup repository. The most common transformation is to compress the backup stream in order to save space on the backup medium. Hence we pipe the data stream coming from the FileSystemReader module through a Compressor module, and provide the output of this compressor to the RepositoryWriter. After the backup is done, the backup repository contains a single zip file containing all the user's files.
