[zeromq-dev] PUB-SUB with asynchronous response

Doron Somech somdoron at gmail.com
Mon May 9 17:43:19 CEST 2016

I'm not sure I fully understand the challange, anyway this is what I have
in mind:

Auction server that expose both PUB and ROUTER. Bidders connect to both.
Bidder subscribe to relevant auction. When bidder want to mske a bid it
sending message to the router which process the bid and publish it.

What am I missing?
On May 9, 2016 02:22, "Rajalakshmi Iyer" <rajalakshmi.iyer at blis.com> wrote:

> Hello,
> I am working on an auction server which needs to forward each incoming
> request to several bidding services and conduct an auction based on the
> responses received from the bidders in real-time.
> One option is to employ asynchronous REQ-REP using ROUTER-DEALER against
> each bidder for every incoming request. As the number of bidder types
> increases, this option will cause the auction server to run out of sockets.
> Also note that each bidder, is actually a group of auto-scaling bidder
> instances behind a load balancer. Can ROUTER-DEALER work with a 3rd party
> load balancer in between?
> Another option is to use PUB-SUB, where the incoming request is published
> by the auction server and the bidders subscribe to the same, except the
> bidders now need to respond with their bids. One could potentially employ a
> cache to save the bids from all bidders and have the auction server query
> this cache. But that means that the auction server needs to necessarily
> wait for a max timeout before querying this cache, even though bidders
> would have responded way before the timeout.
> Are there any established ZeroMQ patterns that aim to solve such cases?
> Any advice is greatly appreciated.
> Thanks!
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