Draft:  draft-ietf-sipping-presence-scaling-requirements-01
Reviewer: Schmidt, Christian 
Review Date: 9/19/2008
Review Deadline: 9/03/2008
Status: Initial review

Summary:    --Questions/comments

A short comment / queston, concerning a scalility requirement:

   o  REQ-007: Presence systems (intra or inter-domain) SHOULD scale in
      linear proportion to the number of watchers and presentities in
      the system.

This requirement takes not into account the relationsship between presentities And watchers. Meaning for example in adding few presentities with a huge amount of watchers, This linear proportion can not be achieved. Therefore I think, this has to Be taken into account in this requirement.

   o  REQ-007: Presence systems (intra or inter-domain) SHOULD scale in
      linear proportion to the number of watchers and presentities in
      the system. Precondition ist that the number of watchers of a presentity and the
      number of precentities a watcher can monitor is restricted.

What do you think about?