[cap-talk] [e-lang] Distributed E systems

[Monty Zukowski]

Thank you, this is just the kind of information I was looking for!  I  
found one reference to Unums on a Sqeak message from Mark Miller that  
referenced http://www.erights.org/talks/uni-tea/index.html  Otherwise  
Google isn't helping much.  Am I correct in assuming that Unum as a  
research problem is specific to the Croquet, Squeak and E  
communities?  Or is it a general topic in CS?  Any more references  
would be appreciated.

Thanks!

Monty

On May 24, 2006, at 12:46 PM, Stiegler, Marc D wrote:

> There is a fancy version of replicating and updating that is called  
> the
> "unum" which is still a research problem. In an unum, a single  
> "object"
> has multiple "presences", some of which are authoritative, some of  
> which
> are not, all of which update one another. There is a belief (or a  
> wish?)
> that there is a pattern for the unum that can be implemented as a
> library package so you don't have to roll your own. This does not  
> exist
> yet.
>
> There is a very cheap imitation (very very cheap) of the unum in the
> distribution (I know longer remember which app I developed it for)
> called the "summoner": you "summon" an object from a remote location,
> and get a local copy that has some restrictions on its updatability  
> and
> updateness. If you search for "summon" in the distribution source,
> you'll probably find it.