Baker Street vs Zookeeper: What are the differences?
What is Baker Street? A simple client-side load balancer for microservices. Baker Street is an HAProxy-based client side load balancer that simplifies scaling, testing, and upgrading microservices.
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.
Baker Street and Zookeeper can be primarily classified as "Open Source Service Discovery" tools.
Baker Street is an open source tool with 222 GitHub stars and 16 GitHub forks. Here's a link to Baker Street's open source repository on GitHub.
What is Baker Street?
What is Zookeeper?
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What are the cons of using Baker Street?
What are the cons of using Zookeeper?
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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.
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.
Zookeeper manages our state, and tells each node what version of code it should be running.
Used Zookeeper as the resource management system for Mesos/Marathon services.