markusthoemmes commented on a change in pull request #2888: Adapt trigger
throttle for multiple controllers
URL:
https://github.com/apache/incubator-openwhisk/pull/2888#discussion_r149945095
##########
File path:
core/controller/src/main/scala/whisk/core/entitlement/RateThrottler.scala
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@@ -43,14 +44,17 @@ class RateThrottler(description: String,
defaultMaxPerMinute: Int, overrideMaxPe
/**
* Checks whether the operation should be allowed to proceed.
* Every `check` operation charges the subject namespace for one operation.
+ * Allows 20% of additional requests on top of the limit to mitigate
possible unfair round-robin loadbalancing between
+ * controllers
*
* @param user the identity to check
* @return true iff subject namespace is below allowed limit
*/
def check(user: Identity)(implicit transid: TransactionId): RateLimit = {
val uuid = user.uuid // this is namespace identifier
val throttle = rateMap.getOrElseUpdate(uuid, new RateInfo)
- val limit = overrideMaxPerMinute(user).getOrElse(defaultMaxPerMinute)
+ val limit =
+
Math.ceil((overrideMaxPerMinute(user).getOrElse(defaultMaxPerMinute).toDouble /
diviser.toDouble) * 1.2).toInt
Review comment:
This computation needs to be done only iff controllerHA is active. I propose
to adjust the values passed into the RateThrottlers based on the controllerHA
value one level above instead of passing everything through here. Should leave
the RateThrottler untouched.
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