- Scaling is used to alters size of a system.
- In this process expand the system to meet the expected needs or we either compress.
- The scaling operation is by adding a new system in the existing one, or both or it can be achieved by adding resources to meet the smaller expectation in the current system.
- In this operation, there are two types scaling:
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- Vertical Scaling
- Horizontal Scaling
Vertical Scaling
- In this existing system where the new resources are added to meet the expectation.
- Resources that comprise the existing system and consider as a rack of servers.
- It is based on the idea of adding more power (CPU, RAM) to existing systems, basically adding more resources.
- It becomes cheaper than Horizontal scaling but it is not easy to process.
- The size of the existing system become expands vertically.
- It may involve downtime and harder to upgrade.
Horizontal Scaling
- In this existing system where the new server racks are added to meet the higher expectation.
- Resources that comprise the existing system and consider as a rack of servers
- It is based on the idea of adding more machines into our pool of resources.
- It is costlier than Vertical Scaling and difficult.
- To upgrade it is easy.
