pvary commented on code in PR #11513:
URL: https://github.com/apache/iceberg/pull/11513#discussion_r1876635103


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core/src/main/java/org/apache/iceberg/actions/FileRewriteGroup.java:
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@@ -0,0 +1,93 @@
+/*
+ * 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.iceberg.actions;
+
+import java.util.Comparator;
+import java.util.List;
+import org.apache.iceberg.ContentFile;
+import org.apache.iceberg.ContentScanTask;
+import org.apache.iceberg.RewriteJobOrder;
+
+/**
+ * Container class representing a set of files to be rewritten by a {@link 
FileRewriteExecutor}.

Review Comment:
   The current code makes sure that the exact same compaction result is 
generated than with the previous algorithm.
   
   In the old code we had:
   - Plan level
       - writeMaxFileSize - which governs the target file size when rewriting 
(SparkWriteOptions.TARGET_FILE_SIZE_BYTES)
   - Group level
       - splitSize -  which governs the input split size when rewriting 
(SparkReadOptions.SPLIT_SIZE, splitSize)]
       - expectedOutputFiles - which governs the shuffle partition numbers for 
shuffling rewriters
   
   In the new code I have mirrored this.
   
   I think the new code would be much cleaner if we put all of this information 
into the group level (we could get rid of the `initPlan` step)



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