August 2008 - jboss-dev-forums - Jboss List Archives

[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by timfox

A logical clustered queue is composed of a set of partial queues one on each node of the cluster. When a message is sent to a logical queue it is sent to one of the nodes of the cluster and it goes into the partial queue on that node. If there are local consumers on that node, all well and good, the local consumer will consume the message. If there are no local consumers, or the local consumer is busy (it's buffer is full), and there are idle consumers on other nodes, then the message can be sent to another (redistributed) so it can be consumed by a different consumer. That's what we call message redistribution. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171148#4171148 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171148

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[Design the new POJO MicroContainer] - What can the MicroContainer do for me?

by thinkstream

Hello, I am currently evaluating various Jboss technologies and the MicroContainer (MC) looks very promising. I have a few question I'd be appreciate if someone could answer. 1. Is the MC similar in concept to Spring ? 2. According to documentation, I don't need App Server to run MC. How do I use MC if I also want to use web tier (JSP, JSF, Servlets)? 3. What is the possible integration between MC and 3.1 Drools 3.2 Jbmp 4. Can the MC run as another module within App Server so the integration mentioned above would be seamless. 5. On the subject of seamless, can the MC be used within Seam? Thanks in advance for any help -Tom View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171141#4171141 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171141

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by jeffdelong

Sorry, but I don't find this topic mentioned in the JBoss Messaging 1.4 User's Guide. What is a partial queue? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171140#4171140 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171140

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by timfox

"jeffdelong" wrote : | What does the message re-distribution feature provide? Message redistribution in 1.4 moves messages between partial queues to satisfy consumption demand. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171136#4171136 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171136

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by jeffdelong

My apologies for not understanding the "re-distribution" feature. Tim's original post said anonymous wrote : ... contains message redistribution with clustered queues. | | This means, if you have a clustered queue over several nodes in a cluster, and consumers on one node are faster than consumers on another node, then messages will be pulled from one node to another transparently to satisfy demand. | I thought this was how a clustered queue worked. That is, a message is put on a "local queue", and the messagePeer sends the message to each of its peers in the cluster. The first available consumer de-queues the message, and it is removed from the other message peers' instance of the clustered queue. What does the message re-distribution feature provide? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171135#4171135 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171135

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by timfox

"clebert.suconic(a)jboss.com" wrote : IMO we just document customers will need to guarantee a consumer on each node. | | But if you tell me that's not an option.. than the answer is probably simple.. we probably need to guarantee message redistribution as it was done on JBM 1.4. I think we need to prevent stranded messages, but that doesn't mean we have to do it as it was done in 1.4. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171133#4171133 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171133

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by clebert.suconic＠jboss.com

IMO we just document customers will need to guarantee a consumer on each node. But if you tell me that's not an option.. than the answer is probably simple.. we probably need to guarantee message redistribution as it was done on JBM 1.4. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171132#4171132 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171132

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by timfox

"clebert.suconic(a)jboss.com" wrote : My vote is for get rid of Message redistribution. | If we did that, how would we deal with stranded messages (messages stuck on nodes with no consumers). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171129#4171129 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171129

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[Design of JBoss/Tomcat Integration] - JBossWeb-based load metrics for mod_cluster

by pferraro

I've completed a basic set of load metric implementations for mod_cluster and would appreciate some feedback from the JBossWeb folks. The relevant java code can be found here: https://svn.jboss.org/repos/jbossas/trunk/tomcat/src/main/org/jboss/web/t... The specific LoadMetric implementations from JBossWeb sources are: impl/ActiveSessionsLoadMetric.java impl/BusyConnectorsLoadMetric.java impl/ReceiveTrafficLoadMetric.java impl/RequestCountLoadMetric.java impl/SendTrafficLoadMetric.java These implementations currently use mbean attributes to access the desired information. Is there a better way to access this data? Is there any other data available from JBossWeb (or elsewhere) that is suitable for a load balancing metric? The load metrics from each configured source are periodically aggregated by the DynamicLoadBalanceFactorProvider: https://svn.jboss.org/repos/jbossas/trunk/tomcat/src/main/org/jboss/web/t... When aggregating LoadMetrics, each load value (i.e. LoadMetric.getLoad()) is normalized as a ratio from some benchmark value (i.e. LoadMetric.getBenchmark()). The weight of the metric (i.e. LoadMetric.getWeight()) is then applied to each normalized load value. The normalized, weighted loads are added and stored in a queue of historical load values. This history queue has a fixed length - old values will be removed to make room for new values. Each calculation run divides the historical load values by a decay factor. The final result of the load balance calculation run is the sum of the time-decayed load values from the history queue. The decay factor (default = 2), and the length of the history queue (default = 10) are configurable. Feedback on this logic is also appreciated. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171126#4171126 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171126

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Message redistribution in JBM 2.0 - request for feedback

by clebert.suconic＠jboss.com

My vote is for get rid of Message redistribution. As I said I haven't been dealing with customers... so I would value more the opinion of people who do it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171124#4171124 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171124

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jboss-dev-forums August 2008