fix复制分片计算方式

@@ -158,15 +158,28 @@ public class YohoIndexServiceImpl implements IYohoIndexService, ApplicationEvent
             }
             // 获取配置的主分片数
             int numberOfPrimary = MapUtils.getIntValue(indexSettings, "number_of_shards");//配置的主分片数
-            // 动态计算复制分片数【1个主分片就是机器数-1 ， 4个主分片，4台机器就是  0，然后取1 】
-            int number_of_replicas = dataNodesCount/numberOfPrimary - 1;
-            return Math.max(1, number_of_replicas);
+            // 计算副本数
+            return getReplicasShardCount(dataNodesCount,numberOfPrimary);
         } catch (Exception e) {
             INDEX_REBUILD_LOG.error(e.getMessage(), e);
             return 0;
         }
     }
 
+    public static int getReplicasShardCount(int dataNodesCount, int numberOfPrimary){
+        if(dataNodesCount==numberOfPrimary){
+            return 1;
+        }
+        int maxTotalIndexCount = dataNodesCount ;
+        int totalIndexCount = dataNodesCount * 2 / numberOfPrimary;
+        totalIndexCount = Math.min(totalIndexCount, maxTotalIndexCount);
+        return Math.max(2, totalIndexCount) -1;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(getReplicasShardCount(4,1));
+    }
+
     /**
      * 创建索引，并返回真实索引名称
      *