Parallel BZip2 for SMP faster backups

[lcg]

Hi all.

I'm using Mondo in some Dual Xeon with Quad Core (total 8 CPU's) and I have just discovered a parallel version of BZIP2.

The results are, obviously, spectacular compared with using the original bzip2 :)

See PBZIP2 at ​http://compression.ca/pbzip2/

I think it would be good if there were some way to change the path or command used to call bzip2, so we can use pbzip2 instead of bzip2.

Thank you very much for considering it, and congratulations for your work! Leo.-