Scalability: ability to handle more work as size of computer or app grows.
#Strong Scaling
The number of processors is increased while the problem size remains constant.
- Mostly used for long-running CPU-bound tasks.
- Amdahl’s law: the speedup is limited by the fraction of the serial part of the software that is not amenable to paralleization.
#Weak Scaling
Both the number of processors and the problem size are increased.
- Mostly used for large memory-bound applications where the required memory cannot be satisfied by a single node.
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