siddhantsangwan commented on a change in pull request #2625:
URL: https://github.com/apache/ozone/pull/2625#discussion_r705236024
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File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/balancer/ContainerBalancer.java
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@@ -627,23 +633,26 @@ private double
calculateAvgUtilization(List<DatanodeUsageInfo> nodes) {
}
clusterCapacity = aggregatedStats.getCapacity().get();
clusterUsed = aggregatedStats.getScmUsed().get();
+ clusterRemaining = aggregatedStats.getRemaining().get();
- return clusterUsed / (double) clusterCapacity;
+ return (clusterCapacity - clusterRemaining) / (double) clusterCapacity;
}
/**
- * Calculates the utilization, that is used space divided by capacity, for
- * the given datanodeUsageInfo.
+ * Calculates the utilization, that is (capacity - remaining) divided by
+ * capacity, for the given datanodeUsageInfo.
*
* @param datanodeUsageInfo DatanodeUsageInfo to calculate utilization for
* @return Utilization value
*/
public static double calculateUtilization(
DatanodeUsageInfo datanodeUsageInfo) {
SCMNodeStat stat = datanodeUsageInfo.getScmNodeStat();
+ double capacity = stat.getCapacity().get();
+ double remaining = stat.getRemaining().get();
+ double numerator = capacity - remaining;
- return stat.getScmUsed().get().doubleValue() /
- stat.getCapacity().get().doubleValue();
+ return numerator / capacity;
}
Review comment:
Currently the utilization api uses `compareByRemainingRatio` in
`SCMNodeStat`. We could instead have a `calculateUtilization` method in the
`DatanodeUsageInfo` class.
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