[GitHub] [flink-ml] gaoyunhaii commented on a change in pull request #16: [FLINK-9][iteration] Support per-round iteration

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gaoyunhaii commented on a change in pull request #16:
URL: https://github.com/apache/flink-ml/pull/16#discussion_r739822786



##########
File path: flink-ml-iteration/src/main/java/org/apache/flink/iteration/config/IterationOptions.java
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@@ -0,0 +1,33 @@
+/*
+ * 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.iteration.config;
+
+import org.apache.flink.configuration.ConfigOption;
+
+import static org.apache.flink.configuration.ConfigOptions.key;
+
+/** The options for the iteration. */
+public class IterationOptions {
+
+    public static final ConfigOption<String> DATA_CACHE_PATH =

Review comment:
       This would also be used for operators to cache records, like in `withBroadcast`. 




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