Eureka
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Eureka vs Zookeeper: What are the differences?

What is Eureka? AWS Service registry for resilient mid-tier load balancing and failover. Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for locating services for the purpose of load balancing and failover of middle-tier servers.

What is Zookeeper? Because coordinating distributed systems is a Zoo. A centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.

Eureka and Zookeeper can be primarily classified as "Open Source Service Discovery" tools.

"Easy setup and integration with spring-cloud " is the primary reason why developers consider Eureka over the competitors, whereas "High performance ,easy to generate node specific config" was stated as the key factor in picking Zookeeper.

Eureka is an open source tool with 7.98K GitHub stars and 2.2K GitHub forks. Here's a link to Eureka's open source repository on GitHub.

Uber Technologies, Pinterest, and Shopify are some of the popular companies that use Zookeeper, whereas Eureka is used by Notify-e, Swingvy, and LabNetwork. Zookeeper has a broader approval, being mentioned in 116 company stacks & 48 developers stacks; compared to Eureka, which is listed in 7 company stacks and 14 developer stacks.

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What is Eureka?

Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for locating services for the purpose of load balancing and failover of middle-tier servers.

What is Zookeeper?

A centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.

Want advice about which of these to choose?Ask the StackShare community!

Why do developers choose Eureka?
Why do developers choose Zookeeper?
What are the cons of using Eureka?
What are the cons of using Zookeeper?
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      What companies use Eureka?
      What companies use Zookeeper?
      What are some alternatives to Eureka and Zookeeper?
      Consul
      Consul is a tool for service discovery and configuration. Consul is distributed, highly available, and extremely scalable.
      etcd
      etcd is a distributed key value store that provides a reliable way to store data across a cluster of machines. It’s open-source and available on GitHub. etcd gracefully handles master elections during network partitions and will tolerate machine failure, including the master.
      Keepalived
      The main goal of this project is to provide simple and robust facilities for loadbalancing and high-availability to Linux system and Linux based infrastructures.
      Serf
      Serf is a service discovery and orchestration tool that is decentralized, highly available, and fault tolerant. Serf runs on every major platform: Linux, Mac OS X, and Windows. It is extremely lightweight: it uses 5 to 10 MB of resident memory and primarily communicates using infrequent UDP messages.
      SkyDNS
      SkyDNS is a distributed service for announcement and discovery of services. It leverages Raft for high-availability and consensus, and utilizes DNS queries to discover available services. This is done by leveraging SRV records in DNS, with special meaning given to subdomains, priorities and weights (more info here: http://blog.gopheracademy.com/skydns).
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      What tools integrate with Eureka?
      What tools integrate with Zookeeper?
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        Avatar of Soundcloud
        Soundcloud uses ZookeeperZookeeper

        Initially, Stitch only supported real-time updates and addressed this problem with a MapReduce job named The Restorator that performed the following actions:

        • Calculated the expected totals
        • Queried Cassandra to get the values it had for each counter
        • Calculated the increments needed to apply to fix the counters
        • Applied the increments

        Meanwhile, to stop the sand shifting under its feet, The Restorator needed to coordinate a locking system between itself and the real-time processors, so that the processors did not try to simultaneously apply increments to the same counter, resulting in a race-condition. It used ZooKeeper for this.

        Avatar of Pinterest
        Pinterest uses ZookeeperZookeeper

        Like many large scale web sites, Pinterest’s infrastructure consists of servers that communicate with backend services composed of a number of individual servers for managing load and fault tolerance. Ideally, we’d like the configuration to reflect only the active hosts, so clients don’t need to deal with bad hosts as often. ZooKeeper provides a well known pattern to solve this problem.

        Avatar of Pinterest
        Pinterest uses ZookeeperZookeeper

        Zookeeper manages our state, and tells each node what version of code it should be running.

        Avatar of Ralic Lo
        Ralic Lo uses ZookeeperZookeeper

        Used Zookeeper as the resource management system for Mesos/Marathon services.

        Avatar of Nurul Ferdous
        Nurul Ferdous uses ZookeeperZookeeper

        Maintain a distributed cluster for search index

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