[zeromq-dev] High water mark notification for publisher

Edwin Amsler edwinamsler at thinkboxsoftware.com
Sun Sep 23 04:48:43 CEST 2012

It's unlikely that an application can produce more data per second than 
the network hardware is able to handle?

On 22/09/2012 12:57 AM, Pieter Hintjens wrote:
> On Sat, Sep 22, 2012 at 12:57 AM, Edwin Amsler
> <edwinamsler at thinkboxsoftware.com> wrote:
>> It was mentioned that under the hood, the PUB-SUB system had individual
>> outgoing queues, each with their own water mark counters. What happens
>> to a message when all queues are full?
> This is such an unlikely case... almost contrived. The real issue with
> high-speed pub/sub is a small number of clients disconnecting or
> getting swamped by other work, and their queues building up, and
> causing memory exhaustion.
> The best strategy to keep data flowing but also ensure reliability is
> then some kind of out-of-band recovery for clients that need it.
> There's some ideas in the Clone pattern in the Guide (request snapshot
> at startup, then apply changes as they arrive to the snapshot).
> -Pieter
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