Terminology for replication

[Jacob Palme <jpalme at DSV.SU.SE>]

What is the correct term for various kinds of replication. Below is a
proposal as a basis for a discussion.

Function						Proposed term
-------------------------------------------------------+-------------------
A general term for all kinds of copying of identical	Replication
to several stores.

Replication, where the stores which hold the ori-	Mirroring
gal knows about where copies are held and periodic      (I have also heard
automatic updates ensure conformance between mirror     the term push-
copies and the original.				caching)

Replication, where a store saves a copy of a docu-      Caching
ment which it happens to get, without 100 % safe
methods against outdated objects in the cache.

Caching with some added facilities, such as		Controlled caching?
"Expiry" fields, to reduce the risk of outdated
objects in a cache.

Replication, where all copies are equally valid,        ?????
none of them is the "original", as in Usenet News.

------------------------------------------------------------------------
Jacob Palme <jpalme at dsv.su.se> (Stockholm University and KTH)
for more info see URL: http://www.dsv.su.se/~jpalme