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 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)
Nearby terms:
cable modem « cache « cache block « cache coherency »
cache conflict » cache consistency » cache hit
