mdeuser commented on a change in pull request #3778: Add documentation to the
loadbalancer.
URL:
https://github.com/apache/incubator-openwhisk/pull/3778#discussion_r197459513
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File path:
core/controller/src/main/scala/whisk/core/loadBalancer/ShardingContainerPoolBalancer.scala
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@@ -45,10 +45,77 @@ import scala.concurrent.{ExecutionContext, Future, Promise}
import scala.util.{Failure, Success}
/**
- * A loadbalancer that uses "horizontal" sharding to not collide with fellow
loadbalancers.
+ * A loadbalancer that schedules workload based on a hashing-algorithm.
+ *
+ * ## Algorithm
+ *
+ * The loadbalancer schedules workload based on a hashing-algorithm. At first,
for every namespace + action pair a hash
+ * is calculated and then bounded to the number of invokers available. The
determined index is the so called "home
+ * invoker". This is the invoker where the following progression will
**always** start. If this invoker is healthy and
+ * if there is capacity on that invoker, the request is scheduled to it. If
one of these prerequisites is not true,
Review comment:
can you provide more details on the "capacity check"
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