Finally, everything we do is inside one or more clusters. There are no individual servers anymore. We do not decide what goes where. Schedulers do. From our (human) perspective, the smallest entity is a cluster which is a collection of resources like memory and CPU.
![](https://static.packt-cdn.com/products/9781788991278/graphics/assets/a8007b67-a25c-458e-87cb-ebc5486734ef.png)
Figure 10-10: Everything is a cluster