Description:

genbackupdata creates or modifies directory trees in ways that
simulate real filesystems sufficiently well for performance testing of
backup software. For example, it can create files that are a mix of
small text files and big binary files, with the binary files
containing random binary junk which compresses badly. This can then be
backed up, and later the directory tree can be changed by creating new
files, modifying files, or deleting or renaming files. The backup can
then be run again.

The output is deterministic, such that for a given set of parameters
the same output always happens. Thus it is more efficient to
distribute genbackupdata and a set of parameters between people who
wish to benchmark backup software than distributing very large test
sets.