[zeromq-dev] interesting ideas in another project?

Steven McCoy steven.mccoy at miru.hk
Mon Dec 14 07:45:22 CET 2009


2009/12/13 Martin Sustrik <sustrik at 250bpm.com>:
> The biggest part of the work concerns building a "stack" in the message, so
> that at each middlebox source of the message is glued to the message before
> it is forwarded. When reply is coming in the opposite direction, the source
> is stripped from the message and used to route the reply to the correct
> requester.

FYI:  TIBCO Rendezvous does this at the subject level, and is why
there is a reply subject in the header of each message.  The
requirement for this came about for MAN and WAN routing of traffic,
whereby each machine on the local network is not permitted to directly
communicate with every machine on remote networks.

Subjects are a dotted sequence of characters like ØMQ, and whilst
broadcast subjects are left for regular message routing,
point-to-point messages are directed at each message routing hop and
will look something like "_INBOX.0337BCAC.589249F93A08678300.1" for
the local segment, and then have the router INBOX appended so it ends
up looking like
"_INBOX.0337BCAC.589249F93A08678300.1 at _INBOX.023493434.2349834902834ABBFFEE.3"

-- 
Steve-o



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