God , Resque, Resque-schedule, is working,but buggy. Need to combine with LDAP and also implement XML calendar sync.

config/initializers/resque.rb

@@ -3,7 +3,7 @@ require 'resque_scheduler'
 # require 'yaml'
 
 Resque.redis = 'localhost:6379'
-Resque.redis.namespace = "resque:SchedulerExample"
+#Resque.redis.namespace = "resque:SchedulerExample"
 
 # If you want to be able to dynamically change the schedule,
 # uncomment this line.  A dynamic schedule can be updated via the