February 2018
Intermediate to advanced
552 pages
13h 46m
English
Content preview from Scala Reactive Programming
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Elasticity
Elasticity means scalability. Our system should support scale up/scale down and scale out/ scale in. Our Reactive system should support scale up/scale out so that it responds to the users in a timely manner. It should also support scale down/scale in order to save our organization cost.
In simple words, Elastic = React to load.
This means our system should respond to users in a timely manner even at a heavy load.
With this property, a Reactive system can allocate and/or deallocate resources for every component dynamically and automatically to match demands.
If our Reactive system follows the Message-Driven approach, it supports Elasticity easily:
Elasticity = Scale up/down + Scaleout/in
Scale up: When the load increases, a Reactive ...
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