[GitHub] [flink] dawidwys commented on a change in pull request #18341: [FLINK-25194] Implement an API for duplicating artefacts

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dawidwys commented on a change in pull request #18341:
URL: https://github.com/apache/flink/pull/18341#discussion_r783719605



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File path: flink-core/src/main/java/org/apache/flink/core/fs/DuplicatingFileSystem.java
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@@ -0,0 +1,74 @@
+/*
+ * 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.core.fs;
+
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * An extension interface for {@link FileSystem FileSystems} that can perform cheap DFS side
+ * duplicate operation. Such an operation can improve the time required for creating cheaply
+ * independent snapshots from incremental snapshots.
+ */
+public interface DuplicatingFileSystem {

Review comment:
       Not sure, if I understand your concern. Do you mind to elaborate?




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