[GitHub] vvraskin commented on issue #2856: How do you limit the concurrent activations with multiple Controller?

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vvraskin commented on issue #2856: How do you limit the concurrent activations with multiple Controller?
URL: https://github.com/apache/incubator-openwhisk/issues/2856#issuecomment-336924888
 
 
   Hi @hykych! 
   
   basically there are two ways you deploy controllers: active-passive (one controller is active, another one becomes active if the first one fails), active-active (requests are dispatched for multiple controllers simultaneously). I think you mentioned the second case. 
   So for that we use akka cluster to share the number of activations per namespace and activations per invoker across cluster members. You could look it up here:
   https://github.com/apache/incubator-openwhisk/blob/master/core/controller/src/main/scala/whisk/core/loadBalancer/DistributedLoadBalancerData.scala
   
   and here is where we enable this class:
   https://github.com/apache/incubator-openwhisk/blob/master/core/controller/src/main/scala/whisk/core/loadBalancer/LoadBalancerService.scala#L105
 
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