Jiabao-Sun commented on code in PR #1:
URL: 
https://github.com/apache/flink-connector-mongodb/pull/1#discussion_r1025581498


##########
flink-connector-mongodb/src/main/java/org/apache/flink/connector/mongodb/source/enumerator/splitter/PartitionStrategy.java:
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@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.connector.mongodb.source.enumerator.splitter;
+
+import org.apache.flink.annotation.PublicEvolving;
+import org.apache.flink.configuration.DescribedEnum;
+import org.apache.flink.configuration.description.InlineElement;
+
+import static org.apache.flink.configuration.description.TextElement.text;
+
+/** MongoSplitStrategy that can be chosen. */
+@PublicEvolving
+public enum PartitionStrategy implements DescribedEnum {

Review Comment:
   pros:
   - sample: Fast, No extra permission required.
   - split-vector: Fast; Chunk results are even.
   - sharded: Very fast; No calculation is required, directly read the 
[chunks](https://www.mongodb.com/docs/v5.0/reference/config-database/#mongodb-data-config.chunks)
 that have been split.
   
   cons:
   - sample: Chunk results may be uneven.
   - split-vector: `splitVector` permission is required.
   - sharded: Only for sharded collection; The`read` permission  for `config` 
database is required; The chunk size depends on MongoDB server cannot be 
adjusted by this connector.



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