[JBoss Cache: Core Edition] - Re: URGENT - Clustering without multicast
by kindageeky
we've had very good luck with TCP clustering in production and in EC2 (which we use for dev and load testing) ... perf in EC2 seems to be more network bound, with sustained throughput topping out at 250 megabits for XL instances ... don't bother with the smaller instances as the bandwidth is less and the latency is higher. For 4 node clusters we were able to achieve roughly 90% of equivalent performance on real hardware (dual quad core at 2.0 GHz with 16 GB RAM) on EC2, though your mileage may vary. Overall, TCP is ok up to 8 node clusters n our experience (assuming gigabit) for read intensive apps. One other thing we did is to have dedicated bonded nics for the clustering traffic separate from client request traffic nics, and load balanced the VIPs across both the front and back planes. Hope this helps.
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18 years
[EJB 3.0] - How do I set hibernate.dialect property outside of persisten
by robertxlongo＠gmail.com
Hi,
We are deploying an application on JBoss and we would like to give our customers the ability to choose which database (Oracle, MySQL, etc.) they would like to use. It's fairly easy to have the installer lay down a customized ds.xml file in the deploy folder to define the chosen data source; however, we're getting hung up with setting the hibernate.dialect property in the persistence.xml file. For example, if our customer decides that they would like to use MySQL, then we would need the following line in persistence.xml:
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
Of course, we could have the installer unzip our ear file, unzip the jar file and modify the persistence.xml file, but we were wondering if there was a cleaner way of setting this property. Is there an external configuration option that can be used to set a property for a persistence-unit? For example, could I modify something like the persistence.properties file?
Any help would be greatly appreciated.
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18 years
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