James, I don't know a solid answer to your question - but as a starting point, I believe there are unit-testing capabilities in Karaf that might support experimentation along these lines. I almost think the best way to address this would be through brute-force benchmarks. For example, a unit test that generates a specified number of services (e.g. with random names) and dispatches some number of requests to some or all of them - a kind of load/soak testing [1]. Perhaps this already exists - I regret that I do not know for certain.
If it does not already exist, and if you choose to follow this route and are able to create a generic load test, I suspect it would make a good addition to Karaf (as an optional benchmark test suite), and I would encourage you to contribute the suite to the project for the benefit of others with the same use-case. [1]: http://en.wikipedia.org/wiki/Soak_testing ~ Reuben On Fri, Apr 13, 2012 at 12:08, James Gartner <[email protected]>wrote: > Folks, > I've been asked by our architecture group to look into this question: > If we have a number of small services, and composite services that "wrap" > the small services in transactions, how many of these could we reasonably > put into a single container, and what memory sizes are we looking at. > Obviously the size of the bundles/etc. matter, how much memory you can > devote to the JVM for the container, etc,. but I was wondering if anyone > has > any good rule of thumb or actual deployed system numbers that I could use > as > a 'guesstimate" - do you folks have tens of services, hundreds of > services, > thousands/etc. deployed in one container? Memory sizes/issues (like Virgo > has a know PermGen space issue - -does Karaf have any issues like that I > need to be aware of?) > > The architecture they are looking at would be a number of small CRUD-like > services, some validation services, and then composite services layered on > top to provide the transactions across the CRUD services, and these all > need > to sit inside the single OSGi container to do that. > > Any ideas/help appreciated! > > -- > View this message in context: > http://karaf.922171.n3.nabble.com/Memory-usage-and-max-number-of-bundles-services-in-a-single-container-tp3908529p3908529.html > Sent from the Karaf - User mailing list archive at Nabble.com. >
