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From kapitalx <...@pagerduty.com>
Subject Re: Queue/Message Fairness as oppose to Client Fairness
Date Mon, 04 Apr 2011 15:39:30 GMT
Dejan,

Thanks for the response. I have prefetch limit set to 1. But thats not what
I'm trying to achieve. What I need is the opposite side of round robin.
Currently the queue will send messages round robin to each consumer from
first queue then go to second queue, etc (my consumer is subscribed to all
queues). However, I need 1 message to go from each queue sequentially (I
have hundreds of queues) to a single consumer. So a message from queue 1,
then a message from queue 2, .. and back to queue 1.

Thanks


- Ali

On Mon, Apr 4, 2011 at 2:36 AM, Dejan Bosanac [via ActiveMQ] <
ml-node+3425012-1916916449-227126@n4.nabble.com> wrote:

> Try setting small prefetch size (1 or so) so that broker doesn't try to
> send
> a lot of messages from the queue to the consumer in advance. That might
> help
> a bit
>
> http://activemq.apache.org/what-is-the-prefetch-limit-for.html
>
> Regards
> --
> Dejan Bosanac - http://twitter.com/dejanb
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> On Sun, Apr 3, 2011 at 8:55 AM, kapitalx <[hidden email]<http://user/SendEmail.jtp?type=node&node=3425012&i=0&by-user=t>>
> wrote:
>
> > I have 1 broker, 1 consumer, many queues. the queues are arbitrary such
> as
> > ACCOUNT_ID.1 ACCOUNT_ID.2 etc. I'm trying to avoid 1 account flooding its
>
> > queue and starving the other accounts.
> >
> > If the queues look like this (items in array are the messages)
> >
> > ACCOUNT_ID.1 = [ 1a, 1b, 1c, 1d ]
> > ACCOUNT_ID.2 = [ 2a, 2b, 2c, 2d ]
> > ACCOUNT_ID.3 = [ 3a, 3b, 3c, 3d ]
> >
> > I want the consumer to receive messages in a fair order such as = 1a, 2a,
>
> > 3a, 1b, 2b, 3b, ...
> >
> > roundRobinDispatchPolicy does not achieve this, it seems to be designed
> to
> > alternate messages between multiple consumers, but the single consume
> will
> > just receive = 1a, 1b, 1c, 1d, 2a, 2b ...
> >
> > How would I do this?
> >
> > Thanks.
> >
> > --
> > View this message in context:
> >
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> >
>
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