Scalability out

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Document icon Scalability level out Version: 0.2 OIAr logo
Document type: QAdefinition Owner:

J.A.H. Schoonderbeek



Adaptability out has ordinal number 20. It's one-sentence description is:
"Capacity can be scaled outward only.".

When a facility has outward scalability, then the capacity of the facility can be increased by deploying multiple instances of the facility itself, but in a way that precludes removing the added facilities. For example:

  • a RAID-5 array kan be expanded with one or more disks, even when it's on line. However, the array cannot be shrunk to remove a disk.