On 01/31/2016 10:19 PM, jjw tectec wrote:
I sent out the email more than 3 days ago, but it's still not appearing
in the mailing list. Has it been deleted from the archive?
I got the mail, but not the attached image. I actually thought I had
replied as well, but it appears not...
On Thu, Jan 28, 2016 at 1:02 PM, jjw tectec <[email protected]
<mailto:[email protected]>> wrote:
I've set up a simple 4-broker system, where between Bs (source
broker) and Bd (destination broker) are two middle brokers set up in
parallel, like this:
Inline image 1
The script that I used to set up all the resources & routes is shown
at the end of this message.
I attached a publisher to Bs and attached 3 subscribers to the other
3 brokers.
What I was expecting to see was all 3 brokers should see messages.
The actual observation was: Only B1 and Bf received messages. B2
never received messages, even when B1 was down.
route map showed that all broker connections were set up as
expected, but why would only the first route work and not the other?
(I have added more brokers B3 B4... into the test, always, only the
first established route would work.) Please help.
Without the picture I'm not entirely sure I'm correctly understanding
your system. However it sounds like it may be the fact that messages
from a queue are not broadcast to all subscribers; the consumers compete
for the messages and each message goes to only one of them.
For small numbers of messages the same consumer may end up getting them
all. For larger numbers there should normally be more fair balancing.
You can improve the balance a little with the --ack option to qpid-route
(which controls the acking frequency and also prefetch).
To use queue routes with a fanout, you would need to create and bind a
queue for each downstream broker. E.g.
B1->Exchange
|
|-> queue1 ---------> B2->Exchange
|-> queue2 ---
|
|------> B3->Exchange
etc
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