Dispatch Router "qdstat -a" clarifying the definition of "phs"

[Adel Boutros <Ad...@live.com>]

Hello,


In the output of qdstat when querying addresses (qdstat -a), there is a field called "phs". Checking the documentation it seems to be related to the phases of an address.

If I understand correctly, there are 2 phases:

* 0: For a consumer receiving a message from the dispatch router

* 1: For a producer sending a message via the dispatch router.


Do you confirm the above explanation? If not, could you please clarify the behavior?


Regards,

Adel

Re: Dispatch Router "qdstat -a" clarifying the definition of "phs"

[Gordon Sim <gs...@redhat.com>]

On 28/09/16 13:20, Adel Boutros wrote:
> Hello,
>
>
> In the output of qdstat when querying addresses (qdstat -a), there is a field called "phs". Checking the documentation it seems to be related to the phases of an address.
>
> If I understand correctly, there are 2 phases:
>
> * 0: For a consumer receiving a message from the dispatch router
>
> * 1: For a producer sending a message via the dispatch router.
>
>
> Do you confirm the above explanation? If not, could you please clarify the behavior?

Phases are relevant for addresses with waypoints. A simple address is 
like a rendezvous point for receivers and senders. If the address has 
one or more waypoints, it becomes a path rather than a point. Phase is 
used to indicate which part of the path a given transfer is associated with.

With a single waypoint - by far the most common case - there are two 
parts to the path; the route in from senders to the waypoint and the 
router back out from the waypoint to any receivers. By default these are 
configured to be phase 0 and 1 respectively. However the phase 
identifiers used can be configured if desired.

 From the routers perspective, each part involves transfers into the 
router and transfers out of the router. It uses the phase to keep the 
associates routes distinct.


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