Gres

Gres is a term with several distinct meanings across different fields, and its meaning is usually clear from the context. The word is often written with different capitalization or accents, as grès in French.

In geology and construction, grès is the French word for sandstone, a sedimentary rock composed mainly of sand-sized mineral grains bound together by cementing material. Sandstones vary in grain size, mineral composition, and cement, and they are used in building, as dimension stone, and as reservoirs in hydrocarbon geology. The term is commonly encountered in French-language geology and related literature.

In ceramics, grès refers to a form of stoneware. Stoneware is a dense, vitreous ceramic fired at high temperatures, producing a durable, non-porous body. In French ceramic terminology, grès denotes a particular stoneware body and the wares made from it, which can range from utilitarian to decorative pieces.

In computing, GRES stands for Generic Resources. It is a concept used by cluster and workload management systems such as the Slurm Workload Manager. GRES enables administrators to define and allocate non-standard resources beyond CPUs and memory, including GPUs, licenses, or other accelerators. Jobs request GRES resources using directives like --gres=gpu:2, and the scheduler enforces allocation according to policy.

Summary: gres/GRES can refer to sandstone in French geology, a type of stoneware in French ceramics, or generic resources in high-performance computing schedulers. The intended meaning depends on the disciplinary context.