Run two mod_perl servers.

Depending on the project size, you should even consider running completely seperate servers for development, QA and production. Since we don't like to shell out the money for a dozen physically separate servers, we use multiple virtual servers on one box with VMware (UserModeLinux will be tested soon).

This can also be applied to the "virtual mod_perl hosting" problem.

Best regards,
  Jochen "geewiz" Lillich