varnish cache purge issue behind load balancer
I am using varnish cache and it works great on single server.
but, I am using varnish cache on multiple servers and putting them all behind a load balancer. so each server has its own cache, this works great in very high traffic website.
however, it becomes difficult to purge cache when pages are updated. I want to know if there is a way to purge cache on multiple servers so that all of them are updated at once.