Requirement for a good solution

• Should work for several class of clients (servers, light servers, workstations...)

• clients should always end up being up to date (replay updates in order if you were down)

• if an update fails, it will retry later

• an update failure should not put a client into an unknown state it may not be able to recover from

• The install should be updated at the same time than the installed base, and there should be no lapse of time for new installs

• Some downgrade/rollback capability

Notes: