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From "James Strachan" <james.strac...@gmail.com>
Subject Re: load balance topic consumer
Date Thu, 01 Feb 2007 13:44:36 GMT
On 1/30/07, igah <weiqingh@mail.com> wrote:
>
> that's precisely what i was looking for. thanks!
>
> now the naming convention seems a little bit odd. if i have
> arbitrary/fixed/predefined names for topic and queues (say foo and bar), can
> i link them up?

You can explicitly configure in the activemq.xml a virtual topic to
map to a number of physical queues if you want - otherwise the default
out of the box naming convention will avoid you having ot mess with
XML

James

>
>
> rajdavies wrote:
> >
> > are you looking for this: http://www.activemq.org/site/virtual-
> > destinations.html
> >
> > On 30 Jan 2007, at 02:31, igah wrote:
> >
> >>
> >> hi there,
> >>
> >> it's easy to load balance a queue's consumers -- by starting multiple
> >> consumer threads (in the same or different processes). but how to
> >> do this
> >> for a subscriber.
> >>
> >> let me explain what I mean with a use case like this: a message is
> >> published
> >> to a topic, where there are two subscribers, each of which does
> >> something
> >> different. let's say one subscriber's message processing rate is
> >> slower than
> >> the message arrival rate. it's natural to start multiple of them to
> >> distribute the load. but you cannot start another identical
> >> instance of the
> >> subscriber because that would cause the same message to be
> >> processed twice.
> >>
> >> i can think of one solution where i create another queue and
> >> forward all the
> >> messages from the topic to the queue. then we can start as many
> >> consumers on
> >> that queue as we want to. this requires management of this
> >> "forwarder". (you
> >> need to make sure it's always up, etc.)
> >>
> >> is there a better or more "out-of-box" approach?
> >>
> >> thanks in advance.
> >> --
> >> View this message in context: http://www.nabble.com/load-balance-
> >> topic-consumer-tf3139637.html#a8702320
> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >>
> >
> >
> >
>
> --
> View this message in context: http://www.nabble.com/load-balance-topic-consumer-tf3139637.html#a8703850
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 

James
-------
http://radio.weblogs.com/0112098/

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