legato networker directives

All file system data should be compressible; however databases backups (Oracle, Exchange etc) don't tend to compress well so it is best to avoid compressing these. I don't believe you need to have ignore directives that you have included as the compress directive will not work on the VSS data (not too sure about the SYSTEM data) so this should work just as well:

One thing to bear in mind with compression, tape drives will usually have compression enabled by default and this is a much more efficient way of doing it; double compression can have unpredicatable results and may result in the size of backup on tape increasing rather than decreasing.  You would only normally consider using the compressasm directive if you had a slow network link (these days there are deduplication options which may be more suitable for these kind of clients).