May 2017
Intermediate to advanced
436 pages
9h 44m
English
Content preview from The DevOps 2.1 Toolkit: Docker Swarm
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Persisting stateful services with synchronization and replication
When creating stateful services, the natural reaction is to think of a way to preserve their state. While in many cases that is the correct thing to do, in some others it isn't. It depends on service’s architecture.
Throughout this book, we explored at least two stateful services that can synchronize their state across all instances. Those are Docker Flow Proxy and MongoDB. In a nutshell, the ability to synchronize state means that when data inside one instance changes, it is capable of propagating that change to all other instances. The biggest problem with that process is how to guarantee that everyone has the same data without sacrificing availability. We'll leave that discussion ...
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