Zookeeper

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

The New York Times bestseller now a major motion picture starring Jessica Chastain. A true story in which the keepers of the Warsaw Zoo saved hundreds of people from Nazi hands. Jan and Antonina Zabinski were Polish Christian zookeepers horrified by Nazi racism, who managed to save over three hundred people. Yet their story has fallen between the seams of history. Drawing on Antonina’s diary and other historical sources, best-selling naturalist Diane Ackerman vividly re-creates Antonina’s life as “the zookeeper’s wife,” responsible for her own family, the zoo animals, and their “Guests”—Resistance activists and refugee Jews, many of whom Jan had smuggled from the Warsaw Ghetto. Ironically, the empty zoo cages helped to hide scores of doomed people, who were code-named after the animals whose names they occupied. Others hid in the nooks and crannies of the house itself. Jan led a cell of saboteurs, and the Zabinskis’ young son risked his life carrying food to the Guests, while also tending an eccentric array of creatures in the house. With hidden people having animal names, and pet animals having human names, it’s small wonder the zoo’s codename became “The House Under a Crazy Star.” Yet there is more to this story than a colorful cast. With her exquisite sensitivity to the natural world, Diane Ackerman explores the role of nature in both kindness and savagery, and she unravels the fascinating and disturbing obsession at the core of Nazism: both a worship of nature and its violation, as humans sought to control the genome of the entire planet.

When Will steps through a mysterious portal at the zoo he's transported into the World of the Night Zoo, and thrust into an incredible adventure. Bestowed with a Zookeeper's uniform and a magical teleporting torch, he's tasked with protecting the Zoo's inhabitants from the evil Lord of Nulth,and his army of robotic spiders, the Voids. In this, the first of many adventures, Will is introduced to the Zoo's friendlier creatures - the glowing Night Butterflies, Bumbling Bees, and he even makes friends with a spying giraffe called Sam. But Will faces his first real test when the Voids attack, does he really have what it takes to bethe Night Zookeeper and save his new friends? From the creators of NightZookeeper.com, a website that makes learning fun, inspires creativity, and engages children with a magical story.

Will journeys through a magical portal to reach a new part of the Night Zoo. In this mission, he must search for Maji the time-travelling elephant in the Tusk Temple.

Provides a simple introduction to the work that zookeepers do, different types of animals with which they interact, and other aspects of a zookeeper's life.

Joined by his friends, Sam and Riya, Will journeys to Fire Desert, where rumours of a creature called 'the Grip' have struck fear into the hearts of the animals.

A young boy and girl visiting the zoo watch the keepers as they take care of their animals and decide to become zookeepers when they grow up.

Whether you are a novice to ZooKeeper or already have some experience, you will be able to master the concepts of ZooKeeper and its usage with ease. This book assumes you to have some prior knowledge of distributed systems and high-level programming knowledge of C, Java, or Python, but no experience with Apache ZooKeeper is required.