DaanHoogland commented on code in PR #13561:
URL: https://github.com/apache/cloudstack/pull/13561#discussion_r3613266908
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server/src/main/java/com/cloud/server/StatsCollector.java:
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@@ -1226,6 +1226,14 @@ protected void runInContext() {
Map<Object, Object> metrics = new HashMap<>();
for (HostVO host : hosts) {
+ if (HypervisorType.KVM.equals(host.getHypervisorType()) &&
ManagementServerNode.getManagementServerId() != host.getManagementServerId()) {
+ // When there are multiple Management Server nodes on
the environment, all of them request stat collections for the same VM in
different moments; with that,
+ // the interval from "vm.stats.interval" is not
respected. Also, the stats commands are routed to the Management Server
connected to the Agent where the VM is running.
+ // Furthermore, the number of stat entries on the DB
scales with the number of Management Servers. Therefore, we only request the
stat collections from
+ // hosts connected to the Management Server, honoring
the interval, presenting the correct data, and reducing the necessary storage
to store the VMs stats.
Review Comment:
@GaOrtiga , can you summarise this and move it to a javadoc?
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