[Spread-users] What are "CAUSAL" messages?
ben at algroup.co.uk
Fri Jul 19 14:22:11 EDT 2002
Ned Konz wrote:
> This may be a stupid question, but I haven't seen it answered
> What is a Causal message, and why or when would I want one?
> I understand that it is a kind of ordering guarantee, but I don't
> understand what the ordering is or when it matters.
Causal means that if anyone receives message A before they send message
B, then everyone is guaranteed to also get A before B (i.e. causal
ordering, in the physics sense, is preserved).
"There is no limit to what a man can do or how far he can go if he
doesn't mind who gets the credit." - Robert Woodruff
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