Exascale

Part of speech: adjective

Definitions

1. A computational benchmark indicating a system capable of executing at least one exaflop, translating to a quintillion operations per second
2. Referring to advanced computer systems designed to achieve performance metrics of one exaflop, thereby enhancing scientific research and data analytics
3. Describing a category of supercomputers that can perform calculations at an astonishing rate of one exaflop, crucial for large-scale simulations and complex problem-solving

Etymology: "Exascale" is a compound built from "exa-" and "scale." The first part, "exa-", is the SI prefix meaning a factor of a quintillion (10 to the power of 18), taken from the Greek "hex," meaning six, because it denotes the sixth power of a thousand. The second part, "scale," in this sense refers to the magnitude or size of a computing system's performance rather than a physical measurement. The result is a label for machines that reach an exaflop, one quintillion floating-point operations per second. Because the prefix describes a number so large that it was once only a theoretical unit, "exascale" marks a threshold in computing speed rather than a scale of physical size. Systems crossing that threshold became a notable milestone in high-performance computing, and the term names the class of machines that reached it.