anujmodi2021 commented on code in PR #8043: URL: https://github.com/apache/hadoop/pull/8043#discussion_r2470595674
########## hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsTailLatencyTracker.java: ########## @@ -0,0 +1,159 @@ +/** + * 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.fs.azurebfs.services; + +import java.util.HashMap; +import java.util.Map; +import java.util.concurrent.Executors; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.locks.ReentrantLock; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hadoop.fs.azurebfs.AbfsConfiguration; + +/** + * Account Specific Latency Tracker. + * This class tracks the latency of various operations like read, write etc for a single account. + * It maintains a sliding window histogram for each operation type to analyze latency patterns over time. + */ +public class AbfsTailLatencyTracker { + + private static final Logger LOG = LoggerFactory.getLogger( + AbfsTailLatencyTracker.class); + private static AbfsTailLatencyTracker singleton; + private static final ReentrantLock LOCK = new ReentrantLock(); + private static final int HISTOGRAM_MAX_VALUE = 60_000; + private static final int HISTOGRAM_SIGNIFICANT_FIGURES = 3; + private final Map<AbfsRestOperationType, SlidingWindowHdrHistogram> + operationLatencyMap = new HashMap<>(); + private final AbfsConfiguration configuration; + + /** + * Constructor to initialize the latency tracker with configuration. + * @param abfsConfiguration Configuration settings for latency tracking. + */ + public AbfsTailLatencyTracker(AbfsConfiguration abfsConfiguration) { + this.configuration = abfsConfiguration; + ScheduledExecutorService histogramRotatorThread = Executors.newSingleThreadScheduledExecutor( + r -> { + Thread t = new Thread(r, "Histogram-Rotator-Thread"); + t.setDaemon(true); + return t; + }); + long rotationInterval = configuration.getTailLatencyAnalysisWindowInMillis() Review Comment: Taken -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
