May 2009
Intermediate to advanced
398 pages
11h 5m
English
Content preview from Software Performance and Scalability: A Quantitative Approach
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Introduction
All good things start with smart choices. | ||
| --Anonymous | ||
PERFORMANCE VERSUS SCALABILITY
Before we start, I think I owe you an explanation about what the difference is between performance and scalability for a software system. In a word, performance and scalability are about the scalable performance for a software system.
You might find different explanations about performance versus scalability from other sources. In my opinion, performance and scalability for a software system differ from and correlate to each other as follows:
Performance measures how fast and efficiently a software system can complete certain computing tasks, while scalability measures the trend of performance with increasing load. There are two major types of computing tasks that are measured using different performance metrics. For OLTP (online transaction processing) type of computing tasks consisting of interactive user activities, the metric of response time is used to measure how fast a system can respond to the requests of the interactive users, whereas for noninteractive batch jobs, the metric of throughput is used to measure the number of transactions a system can complete over a time period. Performance and scalability are inseparable from each other. It doesn't make sense to talk about scalability if a software system doesn't perform. However, a software system may perform but not scale.
For a given environment that consists of properly sized hardware, properly configured operating system, and ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.