jiajunwang commented on a change in pull request #362: The WAGED rebalancer
cluster model implementation
URL: https://github.com/apache/helix/pull/362#discussion_r310338335
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File path:
helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/model/AssignableReplica.java
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@@ -19,9 +19,119 @@
* under the License.
*/
+import org.apache.helix.model.ResourceConfig;
+import org.apache.helix.model.StateModelDefinition;
+
+import java.io.IOException;
+import java.util.Map;
+
/**
- * A placeholder before we have the implementation.
- *
* This class represents a partition replication that needs to be allocated.
*/
-public class AssignableReplica { }
+public class AssignableReplica implements Comparable<AssignableReplica> {
+ private final String _partitionName;
+ private final String _resourceName;
+ private final String _resourceInstanceGroupTag;
+ private final int _resourceMaxPartitionsPerInstance;
+ private final Map<String, Integer> _capacityUsage;
+ // The priority of the replica's state
+ private final int _statePriority;
+ // The state of the replica
+ private final String _replicaState;
+
Review comment:
The rebalance logic will take care of the resource, partition, and also
state priority.
The priority we recorded in the replica is mainly for the top state. Since
that is really something special.
In fact, I tried to use a boolean isTopState. But then I find the number of
priority already exists and it is the most direct information. The model class
shall not do extra calculation.
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