[GitHub] [pinot] chenboat commented on a diff in pull request #10915: [Upsert TTL] Add Watermark for each partitions for Primary key cleanup

["chenboat (via GitHub)" <gi...@apache.org>]

chenboat commented on code in PR #10915:
URL: https://github.com/apache/pinot/pull/10915#discussion_r1231673523


##########
pinot-spi/src/main/java/org/apache/pinot/spi/config/table/UpsertTTLConfig.java:
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@@ -0,0 +1,76 @@
+/**
+ * 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.pinot.spi.config.table;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyDescription;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Nullable;
+
+
+/**
+ * The {@code UpsertTTLConfig} class contains the upsert TTL (time-to-live) related configurations.
+ * Pinot upsert keeps track of all primary keys in heap, it's costly and also affects performance when table is large.
+ *
+ * If primary keys in the table have lifecycle, they won't get updated after a certain period time, then we can use the
+ * following configuration to enable upsert ttl feature. Pinot will only keeps track of alive primary keys in heap.

Review Comment:
   alive primary keys --> primary keys within ttl window



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