Is your system prepared to scale up? How you ensured this?

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Scalability can be measured in various dimensions, such as:

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Administrative scalability: The ability for an increasing number of organizations or users to easily share a single distributed system.
Functional scalability: The ability to enhance the system by adding new functionality at minimal effort.
Geographic scalability: The ability to maintain performance, usefulness, or usability regardless of expansion from concentration in a local area to a more distributed geographic pattern.
Load scalability: The ability for a distributed system to easily expand and contract its resource pool to accommodate heavier or lighter loads or number of inputs. Alternatively, the ease with which a system or component can be modified, added, or removed, to accommodate changing load.

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(Wikipedia)

Competencies