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Zookeeper vs Raft: Stateful distributed coordination with HA and Fault Tolerance

Distributed systems are made up of many components such as authentication, a persistence layer, stateless services, load balancers, and stateful coordination services. These coordination services are central to the operation of the system, performing tasks such as maintaining system configuration state, ensuring service availability, name resolution, and storing other system metadata. Given their central role in the system it is essential that these systems remain available, fault tolerant and consistent. By providing a highly available file system-like abstraction as well as powerful recipes such as leader election, Apache Zookeeper is often used to implement these services. Although powerful, the Zookeeper interface may not be flexible enough or provide sufficient performance for all applications and many systems are replacing Zookeeper based solutions with Raft which provides a more generic interface to high availability and fault tolerance through the use of State Machine replication. This talk will go over a generic example of stateful coordination service moving from Zookeeper to Raft.

Speaker: David Zhu, Alluxio

David Zhu is a software engineer manager at Alluxio. At Alluxio, David mainly focuses on metadata syncing, job service and end-to-end performance benchmarking and optimizations. Prior to that, David completed his Ph.D. from UC Berkeley’s AMPLab, with a focus on distributed data management systems and operating systems for the data center. David also holds a Bachelor of Software Engineering from the University of Waterloo.

Meetup host: Big Data Bellevue
https://www.meetup.com/big-data-bellevue-bdb/events/kvpwtsydcnbbc/

Related Blog: https://www.alluxio.io/blog/from-zookeeper-to-raft-how-alluxio-stores-file-system-state-with-high-availability-and-fault-tolerance/

This will be a hybrid event. Attendees can join both in-person as well as online.

Oct 20, 2022 06:00 PM in Pacific Time (US and Canada)