January 2019
Intermediate to advanced
520 pages
14h 32m
English
Content preview from Hands-On Microservices with Rust
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Impossible to scale vertically
There are two common approaches to scaling an application:
- Horizontally: Where you start a new instance of application
- Vertically: Where you improve an independent application layer that has a bottleneck
The simplest way to scale a backend is to start another instance of the server. This will solve the issue, but in many cases it is a waste of hardware resources. For example, imagine you have a bottleneck in an application that collects or logs statistics. This might only use 15% of your CPU, because logging might include multiple IO operations but no intensive CPU operations. However, to scale this auxiliary function, you will have to pay for the whole instance.
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