DoK Community #41 Designing Stateful Apps for the Cloud and Kubernetes // Evan Chan

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Abstract of the talk…

Almost all applications have some kind of state. Some data processing apps and databases have huge amounts of state. How do we navigate a cloud-based world of containers where stateless and functions-as-a-service is all the rage? As a long-time architect, designer, and developer of very stateful apps (databases and data processing apps), I’d like to take you on a journey through the modern cloud world and Kubernetes, offering helpful design patterns, considerations, tips, and where things are going. How is Kubernetes shaking up stateful app design? - What kind of state is there, and what are some important characteristics? - Kubernetes, containers, and the stateless paradigm (pushing state into DBs) - Where state lives and the persistence characteristics - Stateless vs serverless - why stateless is not really stateless, but server less really is - Improving on stateless paradigm using local state pattern - Logs and event streaming for reasoning about state and failure recovery - The case for local disks: ML, Databases, etc. - Kubernetes and the Persistent Volume/StatefulSets - Leveraging Kubernetes PVs as a basis for building distributed data systems - Mapping the solution space

Bio…

Evan has been a distributed systems / data / software engineer for twenty years. He led a team developing FiloDB, an open source (github.com/filodb/FiloDB) distributed time series database that can process a million records per second PER NODE and simultaneously answer a large number of concurrent queries per second. He has architected, developed, and productionized large scale data and telemetry systems at companies including Apple, and loves solving the most challenging technical problems at both large and small scales, from advanced custom data structures to distributed coordination. He is an expert in bleeding edge #jvm #java #scala and #rust performance. Current interests include Rust and columnar compression. He has led the design and implementation of multiple big data platforms based on Apache Storm, Spark, Kafka, Cassandra, and Scala/Akka. He has been an active contributor to the Apache Spark project, and a two-time Datastax Cassandra MVP.

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