[zeromq-dev] Relation between - HI_WATER_MARK and SEND_BUFFER_SIZE of zmq ?

Joshua Foster jhawk28 at gmail.com
Sat Aug 18 15:00:08 CEST 2012

HWM is related to the max number of messages in the queue. Send buffer 
size is related to the max size of the message allowed to send. If HWM 
is set to infinite (-1), your process will eventually crash. Once it 
crashes, you lose all the messages in the queue. Do you have some way of 
recovering? Do you care if you lose messages?


> Santosh N Dumbre <mailto:santosh.dumbre at igate.com>
> August 18, 2012 6:55 AM
> H i,
> I want to develop an client application that will send messages to the 
> server and receive acknowledgments from the server.
> The client keep getting data form real-time devices and want to send 
> the same to the server.
> The problem is if the network is down, the client application should 
> maintain a Queue of messages and send to server when the network is up 
> and connection becomes active.
> It is a single-client to single-server application.
> Can this be achieved just by using HI WATER MARK = INFINITE    ?
> Can the  HI_WATER_MARK option maintain a message queue which is bigger 
> than size of SEND_BUFFER_SIZE ?
> Is there any dependency between HI_WATER_MARK  and SEND_BUFFER_SIZE  
> of zmq ?
> Kindly reply and help.
> Thanks,
> Sd.
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