[zeromq-dev] QoS support

[Alexander]

Martin, Steven,

Thanks. The fact that 0mq is closely integrated with the network layer
is just great news, and thanks for the examples! This is going to be
used in a peer-to-peer network, where each node is a router, so
tagging locally does make sense. Martin, where do I look for more
information about the specifics? I need to compile an overview about
this.

Best wishes,

Alex

On Sat, Nov 7, 2009 at 5:58 PM, Steven McCoy <steven.mccoy at miru.hk> wrote:
> 2009/11/7 Alexander <mittspamkonto at gmail.com>
>>
>> I'm doing some research about using message queuing for an application
>> currently using a reliable multi-cast solution. This app has some
>> requirements related to speed and safety, so I will need to be able to
>> control QoS (TOS, DiffServ or any equivalent network-level QoS
>> support) of the packages in the network.
>
> QoS only works at routers, it has limited meaning at other network
> elements.  Generally you configure the gateway routers to add the tags to
> traffic instead of trusting the software to do it properly.
>
> OpenPGM actually tags everything with expedited forwarding (0x2e).  SmartPGM
> from Talarian allows you to configure different PGM packet types to
> different ToS but I haven't seen the need to replicate such additional
> configuration.
>
> Similarly OpenPGM has minimal support for PGM routers which would be
> significantly advantageous in such internetworks.  It's certainly possible
> to add such functionality if desired.
>
> --
> Steve-o
>