It does allow sharding/balancing if your domain allows for a way to specify the shard-key upfront (eg. partitioning by State codes, age-buckets, etc) and the improvement over selectors is that there's no need to worry about multiple consumers and concurrent selection across processes which will naturally screw with message-ordering. Using the grouping feature guarantees a single consumer thread (for its lifetime) reading from its shard which I think is pretty cool.
On Fri, Aug 24, 2012 at 1:48 AM, rmn190 <rmn...@gmail.com> wrote: > thanks for reply. > > but the ‘sticky’ seems to have nothing with load-balance, right? > > > > On Fri, Aug 24, 2012 at 4:37 PM, Gaurav Sharma [via ActiveMQ] < > ml-node+s2283324n4655527...@n4.nabble.com> wrote: > > > Another way to look at it is in terms of the sticky-session analogy > though > > don't be confused by the concept of the 'session'. The keyword of > interest > > is 'sticky'. > > > > On Fri, Aug 24, 2012 at 1:31 AM, rmn190 <[hidden email]< > http://user/SendEmail.jtp?type=node&node=4655527&i=0>> > > wrote: > > > > > in http://activemq.apache.org/message-groups.html, there is a saying: > > > Message > > > Groups provide load balancing of the processing of messages across > > multiple > > > consumers. > > > > > > Although I read the whole article, I have not understood the relation > > > between message group and load-balancing. After all, there has been > > > load-balance already before message group: message broker dispatch > > message > > > according the speed of consumers' acknowledgment. So if there is > > > load-balancing concerned with message group, it is a bigger one in term > > of > > > granularity. > > > > > > correct? > > > > > > Any comments or insights are appreciated. > > > > > > > > > > > > > > > -- > > > View this message in context: > > > > > > http://activemq.2283324.n4.nabble.com/ActiveMQ-message-group-and-load-balancing-tp4655526.html > > > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > > > > > > > > ------------------------------ > > If you reply to this email, your message will be added to the discussion > > below: > > > > > http://activemq.2283324.n4.nabble.com/ActiveMQ-message-group-and-load-balancing-tp4655526p4655527.html > > To unsubscribe from ActiveMQ message group and load-balancing?, click > > here< > http://activemq.2283324.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=4655526&code=cm1uMTkwQGdtYWlsLmNvbXw0NjU1NTI2fC0zMTI5MzkwODI= > > > > . > > NAML< > http://activemq.2283324.n4.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml > > > > > > > > -- > > Best Regards > rmn190 > > > > > -- > View this message in context: > http://activemq.2283324.n4.nabble.com/ActiveMQ-message-group-and-load-balancing-tp4655526p4655528.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. >
