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Building distributed applications is difficult enough without having to coordinate the actions that make them work. This practical guide shows how Apache ZooKeeper helps you manage distributed systems, so you can focus mainly on application logic. Even with ZooKeeper, implementing coordination tasks is not trivial, but this book provides good practices to give you a head start, and points out caveats that developers and administrators alike need to watch for along the way. In three separate sections, ZooKeeper contributors Flavio Junqueira and Benjamin Reed introduce the principles of distributed systems, provide ZooKeeper programming techniques, and include the information you need to administer this service.Learn how ZooKeeper solves common coordination tasks Explore the ZooKeeper API's Java and C implementations and how they differ Use methods to track and react to ZooKeeper state changes Handle failures of the network, application processes, and ZooKeeper itself Learn about ZooKeeper's trickier aspects dealing with concurrency, ordering, and configuration Use the Curator high-level interface for connection management Become familiar with ZooKeeper internals and administration tools

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6 internautes sur 7 ont trouvé ce commentaire utile 
Required reading for distributed system developers and operators 21 avril 2014
Par David Chaiken - Publié sur Amazon.com
Format: Format Kindle
If you're implementing or operating a distributed computing system, some part of your application is going to need asynchronous consensus. Whether your application requires leader election, work queues, synchronized configuration, or similar functionality with asynchronous consensus at its core, you need to use ZooKeeper. Do not try to implement asynchronous consensus yourself! It takes a huge amount of effort to get the underlying algorithms right, to get the programming interface right, and to tune the implementation for real-world operation. The ZooKeeper authors have dedicated years of their lives to solving this problem, so you don't have to do it yourself.

That said, ZooKeeper is a power tool and you can easily cause service outages if you don't use it properly. This book is required reading, because it allows the rest of us to benefit from Flavio and Ben's years of experience working with the ZooKeeper user community. For example, Chapter 5 (Dealing with Failures) gives some very important advice to developers on how to handle connection loss exceptions and return codes. Following the authors' advice leads to quick recovery from transient server failures; ignoring the advice could cause customer-visible performance issues. Another example: Chapter 10 (Running ZooKeeper) starts with a use case that describes how a simple configuration issue resulted in a severe production outage. This kind of configuration issue is now easily preventable if you read this book, understand how ZooKeeper works, and follow the guidance of the authors.

Over the last few weeks, I've been deploying and testing a critical, customer-facing service at Altiscale that uses ZooKeeper for distributed configuration management. Thanks to this book, I was able to learn ZooKeeper quickly, understand our application-level code, deploy (and redeploy) our ZooKeeper servers without any production incidents, and document new processes for testing our ZooKeeper service.
4 internautes sur 4 ont trouvé ce commentaire utile 
A Reference thats been needed for a long time 20 janvier 2014
Par Anthony C. Sheller - Publié sur Amazon.com
Format: Format Kindle Achat vérifié
A book on ZooKeeper has been needed for a long time. The author walks one through setting up and using Zookeeper; this can be contrasted with the small ZooKeeper section in the Hadoop book. This book is much more thorough and in depth coverage of the topic. While I'm still working through the examples and learning, I can say that it is filling a knowledge void that I've been desperate to address for a long time. (BTW -- I pre-ordered this several months ago)
3 internautes sur 3 ont trouvé ce commentaire utile 
Engaging read 23 décembre 2013
Par Anon - Publié sur Amazon.com
Format: Format Kindle Achat vérifié
I really feel like i 'get' zookeper after reading this book. It presents zookeeper in the context of consumers of the service and provides both java and 'c' sample code. It also gets into the internals of zookeeper itself (I must confess that I skimmed this chapter). Top notch information on a fresh approach to distributed systems co-ordination. Definitely worth the money (and more importantly) time.
1 internautes sur 1 ont trouvé ce commentaire utile 
Very good book 29 janvier 2014
Par J. Wu - Publié sur Amazon.com
Format: Format Kindle Achat vérifié
Zookeeper is a great tool, but you don't 'get it' with all the use cases by reading the online docs.
This book does the job by explaining the typical use case, api, framework, and make it much easier to understand.
The book is well written too, easy to follow. Highly recommend it.
1 internautes sur 1 ont trouvé ce commentaire utile 
Good addition to the Apache Zookeeper online docs 31 janvier 2014
Par Sia H. Saputra - Publié sur Amazon.com
Format: Broché Achat vérifié
I am just reading it halfway but it is a good companion to the Apache Zookeeper online examples and docs.

The author gives a good code example with step by step explanation what each important line does.

So far it has been a good read.
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