[helix] branch wagedRebalancer updated: Fix formula incorrection in the comment for measuring baseline divergence. (#559)

[ji...@apache.org]

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jiajunwang pushed a commit to branch wagedRebalancer
in repository https://gitbox.apache.org/repos/asf/helix.git


The following commit(s) were added to refs/heads/wagedRebalancer by this push:
     new 56d071a  Fix formula incorrection in the comment for measuring baseline divergence. (#559)
56d071a is described below

commit 56d071a846a6a5cfe442a45d200a5cf46e9d6d79
Author: Huizhi L <ih...@gmail.com>
AuthorDate: Mon Nov 4 12:38:25 2019 -0800

    Fix formula incorrection in the comment for measuring baseline divergence. (#559)
    
    Fix incorrect formula in the comment for measuring baseline divergence.
---
 .../helix/controller/rebalancer/util/ResourceUsageCalculator.java       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/helix-core/src/main/java/org/apache/helix/controller/rebalancer/util/ResourceUsageCalculator.java b/helix-core/src/main/java/org/apache/helix/controller/rebalancer/util/ResourceUsageCalculator.java
index becf72a..5f324a2 100644
--- a/helix-core/src/main/java/org/apache/helix/controller/rebalancer/util/ResourceUsageCalculator.java
+++ b/helix-core/src/main/java/org/apache/helix/controller/rebalancer/util/ResourceUsageCalculator.java
@@ -82,7 +82,7 @@ public class ResourceUsageCalculator {
    *       }
    *    }
    * }
-   * baseline divergence = (matched: 1) / (doesn't match: 3) = 1/3 ~= 0.333
+   * baseline divergence = (matched: 1) / (total(matched + doesn't match): 3) = 1/3 ~= 0.333
    * @param baseline baseline assignment
    * @param bestPossibleAssignment best possible assignment
    * @return double value range at [0.0, 1.0]