Re: [Xen-devel] Is continuous replication of state possible?

[Mark Williamson <Mark.Williamson@xxxxxxxxxxxx>]

http://foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi?query=deterministic&action=Search

IOW, "Deterministic" basically means that something will proceed predictably, 
with no randomness.  This means that if we know the starting state of a 
deterministic piece of code then we can predict everything it's going to do 
perfectly.

A real machine has lots of non-determinism - for instance interrupts arrive 
randomly and they affect the execution of the code on the machine.  For 
deterministic replay, you'd have to sample all the random events so that you 
could deliver them at the right times when rerunning a virtual machine's 
execution.

HTH,
Mark

On Sunday 09 January 2005 16:21, aq wrote:
> Hello,
>
> I am sorry for a possible stupid question, but may anybody please
> explain to me what this "deterministic" means? When studying papers
> concerning virtual machine, I encoutered many of this terminology,
> like "deterministic event", "deterministic execution",... and dont
> understand its meaning. I did some googles, but to no avail, since
> google returned too many results, and without the correct context, I
> cannot know what is the good links to follow.
>
> Any references to read on this problem is very highly appriciated.
>
> Thank you very much,
> AQ
>
>
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