Latency
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Metric of PerformanceTestMetric 2020. 2. 26. 17:54
1. Overview Network or Multithreading performance refers to measures of service quality of a network as seen by the customer or modules. 2. Description 2.1 Latency The time to completion of a task. Measured in time units. Theoretical reduction of latency by N = Performance improvement by a factor of N. What is N? How many subtasks/threads to break the original task? On a general-purpose computer..
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Enhancing Node PerformanceFramework/Node.js 2020. 2. 21. 22:41
1. Overview 2. Intuition 2.1 Blocking the Event Loop const express = require('express'); const app = express(); function doWork(duration) { const start = Date.now(); while(Date.now() - start { doWork(5000); res.send('Hi there'); }); app.listen(3000) as soon as you and I start writing some javascript code that takes some amount of time to execute our en..
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Hadoop Distributed File System(HDFS)DistributedSystem/HadoopEcyosystem 2019. 9. 8. 21:28
1. Overview Apache HDFS or Hadoop Distributed File System is a block-structured file system where each file is divided into blocks of a pre-determined size. These blocks are stored across a cluster of one or several machines. HDFS follows a Master/Slave Architecture, where a cluster comprises a single Name node(Master node) and all the other nodes are Data nodes(slave nodes). HDFS can be deploye..