[
https://issues.apache.org/jira/browse/HIVE-25165?focusedWorklogId=605851&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-605851
]
ASF GitHub Bot logged work on HIVE-25165:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Jun/21 11:30
Start Date: 03/Jun/21 11:30
Worklog Time Spent: 10m
Work Description: aasha commented on a change in pull request #2321:
URL: https://github.com/apache/hive/pull/2321#discussion_r644714176
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/exec/repl/ReplStatsTracker.java
##########
@@ -0,0 +1,132 @@
+/*
+ * 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.hadoop.hive.ql.exec.repl;
+
+import org.apache.commons.collections4.map.ListOrderedMap;
+import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Tracks the replication statistics per event type.
+ */
+public class ReplStatsTracker {
+
+ // Maintains the descriptive statistics per event type.
+ private HashMap<String, DescriptiveStatistics> descMap;
+
+ // Maintains the top K costliest eventId's
+ private HashMap<String, ListOrderedMap<Long, Long>> topKEvents;
+ // Number of top events to maintain.
+ private final int k;
+
+ public ReplStatsTracker(int k) {
+ this.k = k;
+ descMap = new HashMap<>();
+ topKEvents = new HashMap<>();
+ }
+
+ /**
+ * Adds an entry for tracking.
+ * @param eventType the type of event.
+ * @param eventId the event id.
+ * @param timeTaken time taken to process the event.
+ */
+ public void addEntry(String eventType, String eventId, long timeTaken) {
+ // Update the entry in the descriptive statistics.
+ DescriptiveStatistics descStatistics = descMap.get(eventType);
+ if (descStatistics == null) {
+ descStatistics = new DescriptiveStatistics();
+ descStatistics.addValue(timeTaken);
+ descMap.put(eventType, descStatistics);
+ } else {
+ descStatistics.addValue(timeTaken);
+ }
+
+ // Tracking for top K events, Maintain the list in descending order.
+ ListOrderedMap<Long, Long> topKEntries = topKEvents.get(eventType);
+ if (topKEntries == null) {
+ topKEntries = new ListOrderedMap<>();
+ topKEntries.put(Long.parseLong(eventId), timeTaken);
+ topKEvents.put(eventType, topKEntries);
+ } else {
+ // Get the index of insertion, by descending order.
+ int index = Collections.binarySearch(new
ArrayList(topKEntries.values()), timeTaken, Collections.reverseOrder());
Review comment:
where are you sorting this?
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Issue Time Tracking
-------------------
Worklog Id: (was: 605851)
Time Spent: 0.5h (was: 20m)
> Generate & track statistics per event type for incremental load in
> replication metrics
> --------------------------------------------------------------------------------------
>
> Key: HIVE-25165
> URL: https://issues.apache.org/jira/browse/HIVE-25165
> Project: Hive
> Issue Type: Improvement
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Generate and track statistics like mean, median. standard deviation, variance
> etc per event type during incremental load and store them in replication
> statistics
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