[zeromq-dev] PUB-SUB filtering question

[Steven Clark]

Quick question-

With pub-sub sockets, does the message filtering take place on the
subscriber's side or the publisher's side? In other words, does each
subscriber get all messages across the network and filter them locally, or
does the publisher only send to each subscriber the topics they are
subscribed to? This difference seems significant if there is a high volume
of traffic coming from the PUB.

Also, am I correct in assuming that you are not limited to ascii character
message topics? ie, can I subscribe to messages starting with the 4
non-printable characters 0xDE 0xAD 0xBE 0xEF?

-Steven
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