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ClusterLoadBalancingRouter and refactoring of metrics, see #2547

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* MetricsSelector, calculate capacity, weights and allocate weighted
  routee refs
* ClusterLoadBalancingRouterSpec
* Optional heap max
* Constants for the metric fields
* Refactoring of Metric and decay
* Rewrite of DataStreamSpec
* Correction of EWMA and removal of BigInt, BigDecimal
* Separation of MetricsCollector into trait and two classes,
  SigarMetricsCollector and JmxMetricsCollector
* This will reduce cost when sigar is not installed, such as
  avoiding throwing and catching exc for every call
* Improved error handling for loading sigar
* Made MetricsCollector implementation configurable
* Tested with sigar
This commit is contained in:
Patrik Nordwall 2012-11-07 20:36:24 +01:00
parent f306964fca
commit c9d206764a
18 changed files with 1065 additions and 733 deletions
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7
akka-cluster/src/multi-jvm/scala/akka/cluster/ClusterMetricsSpec.scala
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@ -31,6 +31,8 @@ class ClusterMetricsMultiJvmNode5 extends ClusterMetricsSpec
abstract class ClusterMetricsSpec extends MultiNodeSpec(ClusterMetricsMultiJvmSpec) with MultiNodeClusterSpec with MetricSpec {
import ClusterMetricsMultiJvmSpec._
def isSigar(collector: MetricsCollector): Boolean = collector.isInstanceOf[SigarMetricsCollector]
"Cluster metrics" must {
"periodically collect metrics on each node, publish ClusterMetricsChanged to the event stream, " +
"and gossip metrics around the node ring" taggedAs LongRunningTest in within(60 seconds) {
@ -38,9 +40,8 @@ abstract class ClusterMetricsSpec extends MultiNodeSpec(ClusterMetricsMultiJvmSp
enterBarrier("cluster-started")
awaitCond(clusterView.members.filter(_.status == MemberStatus.Up).size == roles.size)
awaitCond(clusterView.clusterMetrics.size == roles.size)
assertInitialized(cluster.settings.MetricsRateOfDecay, collectNodeMetrics(clusterView.clusterMetrics).toSet)
val collector = MetricsCollector(cluster.selfAddress, log, system.asInstanceOf[ExtendedActorSystem].dynamicAccess)
clusterView.clusterMetrics.foreach(n ⇒ assertExpectedSampleSize(collector.isSigar, cluster.settings.MetricsRateOfDecay, n))
val collector = MetricsCollector(cluster.system, cluster.settings)
collector.sample.metrics.size must be > (3)
enterBarrier("after")
}
"reflect the correct number of node metrics in cluster view" taggedAs LongRunningTest in within(30 seconds) {