qpid-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alan Conway <acon...@redhat.com>
Subject Re: QPID Reliability
Date Thu, 03 Feb 2011 19:07:40 GMT
On 02/03/2011 08:30 AM, Sergey_Zhemzhitsky@troika.ru wrote:
> Jonathan, thanks for help.
>
> Those are queues, not exchanges.
> There are a lot of queues like that
> _@amq.failover_54cb1666-c325-472b-9b83-1bececd2f0a8 when I'm executing
> qpid-stat -q.
> It seems that they are created automatically?
>
> When client starts for the first time there are no  such queues. They are
> created automatically when broker's journal overflow happens. When the
> journal is back to normal I can still see thouse queues.
>
>

These queues are created automatically by clients. They are bound to the 
amq.failover exchange to receive updates on cluster membership, so that clients 
have an up-to-date picture of the brokers they can use for failover. They are 
very low-traffic (one message each time a broker joins or leaves the cluster) 
and are not stored persistently. They should not have any noticeable impact on 
performance of your application.

---------------------------------------------------------------------
Apache Qpid - AMQP Messaging Implementation
Project:      http://qpid.apache.org
Use/Interact: mailto:users-subscribe@qpid.apache.org


Mime
View raw message