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  • Derek Harmon thinks this is interesting:

The host does not necessarily mean a physical machine

From

Cover of Microservices for the Enterprise: Designing, Developing, and Deploying

Note

It could mean a virtual machine.

Of course, for minor microservices in the big scheme of things, one might prefer a process.

Host processes elevate the risk of not providing sufficient isolation between microservices (consider one microservice starving other microservices hosted in other processes of CPU or disk I/O).