Default queues on qpid c++ broker

[sunny]

Does qpid create default queues. I see two queues created when i start the qpid and check the queues using qpid-stat command. These queues are topic-LSS01.6410.1 and reply-LSS01.6410.1. I see some messages also posted on these queues. Can any one please provide some information on these queues.

[Pavel Moravec]

Hi,
what broker do you use? Java or C++? And what version of qpid-stat are you using?

As in the most often case (C++ broker, qpid-stat from qpid 0.12 or older - haven't checked newer versions), qpid-stat (as well as any other qpid-* tool) creates few queues to receive data from the broker. In particular:

qmfc-v2-<hostname>.<PID>.1
qmfc-v2-hb-<hostname>.<PID>.1
qmfc-v2-ui-<hostname>.<PID>.1
reply-<hostname>.<PID>.1
topic-<hostname>.<PID>.1

Can you see also the other queues (qmfc-v2-*) ?

These are used solely for communication between qpid-stat and the broker and they are automatically deleted when qpid-stat finishes. Let re-run the command and you will see a new bunch of queues (with different PID reffering to PID of the process running qpid-stat).

Kind regards,
Pavel Moravec


----- Original Message -----

> From: "sandeep" <[hidden email]>
> To: [hidden email]
> Sent: Tuesday, April 3, 2012 8:47:13 AM
> Subject: Default queues on qpid c++ broker
>
> Does qpid create default queues. I see two queues created when i
> start the
> qpid and check the queues using qpid-stat command. These queues are
> topic-LSS01.6410.1 and reply-LSS01.6410.1. I see some messages also
> posted
> on these queues. Can any one please provide some information on these
> queues.
>
> --
> View this message in context:
> http://qpid.2158936.n2.nabble.com/Default-queues-on-qpid-c-broker-tp7431958p7431958.html
> Sent from the Apache Qpid users mailing list archive at Nabble.com.
>
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[sunny]

Thanks Pavel,

I'm using qpid C++ broker 0.6 version. I see different queues created for each qpid-stat command instance.

[fadams]

Hi All,
The queues that you are seeing are not "default" rather they are created
when a QMF Console is constructed.

All of the qpid tools use QMF (currently they use QMF v1) to retrieve
management information from the broker.

The command line tools create an instance of QMF Console, do their thing
then exit. With things like qpid-config, qpid-stat, qpid-queue-stats
they report all queues including ones that they themselves create via
their QMF Console.

The detail of this may be found here if you are interested
https://cwiki.apache.org/qpid/qmf-protocol.html

Incidentally qpid-queue-stats is probably more useful than qpid-stat for
getting queue information, one gotcha with qpid-stat is that is presents
"prettified" number forms e.g. M for mega G for Giga etc. as face value
this seems nice but with large values of queue depth any useful
precision is lost so it's impossible to tell if a queue depth has
changed :-)

With qpid-queue-stats the full depth value is displayed it also displays
enqueue and dequeue rates, which is generally useful.

Of relevance to your original query it's also possible to provide a
regex filter as a parameter to qpid-queue-stats to limit the display to
relevant queues.

Regards,
Frase

On 03/04/12 09:26, sunny wrote:

> Thanks Pavel,
>
> I'm using qpid C++ broker 0.6 version. I see different queues created for
> each qpid-stat command instance.
>
> --
> View this message in context: http://qpid.2158936.n2.nabble.com/Default-queues-on-qpid-c-broker-tp7431958p7432139.html
> Sent from the Apache Qpid users mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [hidden email]
> For additional commands, e-mail: [hidden email]
>

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