xiaoyuyao commented on a change in pull request #28: HDDS-1569 Support creating
multiple pipelines with same datanode
URL: https://github.com/apache/hadoop-ozone/pull/28#discussion_r337837808
##########
File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/pipeline/SCMPipelineManager.java
##########
@@ -147,10 +152,45 @@ private void initializePipelineState() throws
IOException {
}
}
+ private boolean exceedPipelineNumberLimit(ReplicationFactor factor) {
+ if (factor != ReplicationFactor.THREE) {
+ // Only put limits for Factor THREE pipelines.
+ return false;
+ }
+ // Per datanode limit
+ if (heavyNodeCriteria > 0) {
+ return (stateManager.getPipelines(ReplicationType.RATIS, factor).size() -
+ stateManager.getPipelines(ReplicationType.RATIS, factor,
+ Pipeline.PipelineState.CLOSED).size()) > heavyNodeCriteria *
+ nodeManager.getNodeCount(HddsProtos.NodeState.HEALTHY) /
+ factor.getNumber();
+ }
+
+ // Global limit
+ if (pipelineNumberLimit > 0) {
+ return (stateManager.getPipelines(ReplicationType.RATIS,
+ ReplicationFactor.THREE).size() - stateManager.getPipelines(
+ ReplicationType.RATIS, ReplicationFactor.THREE,
+ Pipeline.PipelineState.CLOSED).size()) >
+ (pipelineNumberLimit - stateManager.getPipelines(
+ ReplicationType.RATIS, ReplicationFactor.ONE).size());
+ }
+
+ return false;
+ }
+
@Override
public synchronized Pipeline createPipeline(
ReplicationType type, ReplicationFactor factor) throws IOException {
lock.writeLock().lock();
+ if (type == ReplicationType.RATIS && exceedPipelineNumberLimit(factor)) {
Review comment:
Should we move this logic into RatisPipelineProvider so that the exception
handling will natually fit into the try/final?
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