cache coherency

storage (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 sharedmemory 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)