(Or "cache consistency") /kash koh-heer' n-see/ The synchronisation of data in multiple caches such that reading a memory location via any cache will return the most recent data written to that location via any (other) cache. Some parallel processors do not cache accesses to {shared memory} to avoid the issue of cache coherency. If caches are used with shared memory then some system is required to detect when data in one processor' s cache should be discarded or replaced because another processor has updated that memory location. Several such schemes have been devised. (1998-11-10)
