azure - Notification to Cloud Service Instance when another instance goes down -

i have cloud service multiple instances. i'm trying find way notify instance if instance b goes down. there way hook azure notifications rather have each instance poll others?

polling simplest approach. aware takes time azure detect if instance goes down (depends on how outage occurs , how manifested). in fact, if app crashes, azure may not detect outage @ all.

i'm involved product called cloudmonix @ http://cloudmonix.com , provides sophisticated monitoring/automation azure , has set of features where-by can call apis when detects issues in environment. perhaps used detect issue instance , post api method implement?

hth