If any system always checks for every available resources it can't scale up easily. Remember single counter and sharded counters.
I think that they use sharded counters (or something like that) for instance availability. That is why sometimes they use 'always on' instances and sometimes not. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
