Filip PSHB is pretty silent on queue semantics, which many people think is as it should be.
You may want to try one of the MQ-PSHB integrations. At RabbitMQ we made RabbitHub, for example: https://github.com/rabbitmq/rabbithub alexis On Tue, Nov 2, 2010 at 11:32 AM, Filip Svendsen <[email protected]> wrote: > I'm evaluating pubsubhubbub for use as a message queue. The messages > have multiple receivers (i.e. subscribers) and all receivers should > receive all messages, so on the face off it, it seems like a good > match. > > I plan to use feed-windowing with ETag/If-None-Match to publish chunks > of new/updated entries, so I'm essentially doing a manual "fat ping" > for publishing: I always know exactly what I'm going to deliver when I > ping the server, and any one update will only be included once in the > feed (are there any plans to add real fat pings from the publisher to > the hub?). > > The messages describe additions and updates to a set of appr. 5 > million entries. The entries describe access rights, so I need to be > pretty sure that all messages reach their subscribers. Todd Hoff > mentions in an earlier thread[1] that pubsubhubbub "seems most useful > in the lossy append style event scenario". Unlike the example in that > thread, my situation fits nicely with a "append style event scenario", > but not with the lossy part. I would love to hear from other people > who have built non-lossy systems with pubsubhubbub. > > My primary concern is that some updates/inserts will be lost: As each > update/insert is only included once, I need to be fairly sure that the > hub will never discard anything. Is this likely to happen, for example > in the app engine implementation? What happens if a subscriber isn't > able to receive messages fast enough during a peak period? At what > point would the hub start discarding messages? > > Secondly, how good is throughput in the app engine implementation? We > need to handle at least 10 MB per minute at peak, I imagine that this > wouldn't be a problem? > > [1]: > http://groups.google.com/group/pubsubhubbub/browse_thread/thread/55ba7a29aa800ab4/7ff09f89192aed3f?lnk=gst
