[zeromq-dev] Cannot setup high water mark for PUB/SUB

[vincegata]

Hello All,

I cannot seem to be able to set up the high water mark for PUB/SUB.

My subscriber is expected sometimes to be somewhat slower than publisher
hence I want the publisher to drop the messages when subscriber is slow. I
want
to set up the high water mark to, say, 2 messages, so when the subscriber
is behind
for two messages then the publisher will start dropping them.

Can you take a look at my code. The publisher sends messages once every
200ms,
the subscriber reads messages once every second, the high water mark is set
to 2.
Hence, I expect subscriber to receive approximately every fifth message.
However,
my subscriber diligently reads all messages consequently and the publisher
gets far
ahead.

http://pastebin.com/2fv525ke

-- thank you!
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