Good point. I will look into that. Many thanks.
Rui On Fri, 28 May 2004, Tim Funk wrote: > Personally - I would run many instances of tomcat clustered to get the > performance you need. It would be much more predictable to maintain. > > -Tim > > Rui Zhang wrote: > > > Many thanks, Tim. That at least sounds worth a try... I've got a valve > > sampling performance data up and running already. > > > > But, Is it sensible we may alter Tomcat to make it QoS-enabled? If > > so, where shall we look at to start? > > > > Best regards, > > > > Rui > > > > > > On Fri, 28 May 2004, Tim Funk wrote: > > > > > >>Nope. The spec doesn't spell this out. If your feeling daring, you could > >>write a filter that tries to set and reset the Thread.priorities on the fly. > >>Then if your JVM pays attention to the thread priorities - you might get the > >>tweaking you need. (You can also do this in a Valve if you want to be lower > >>in the stack but I really doubt any of this is useful but its a great time > >>waster on a cold rainy day) > >> > >>For example - without all the need try catches ... > >>doFilter(...) { > >> int newPriority = magicMethodToDeterminePriority(request); > >> int oldPriority = currentThread().getPriority(); > >> currentThread().setPriority(newPriority); > >> chain.doFilter(); > >> currentThread().setPriority(oldPriority ); > >>} > >> > >>-Tim > >> > >>Rui Zhang wrote: > >> > >> > >>>Hi all, > >>> > >>> Is there any infrastruture availabe (or at least any possiblities) in > >>>Tomcat to tune the QoS requests are receiving? > >>> > >>> For instance, is it possible to give differentiated treatments to > >>>requests of various importance, by granting them different amount of > >>>resources, queueing them differently, etc? > >>> > >>> I realise my questions might be a bit vague, as I don't have too much > >>>insight about Tomcat. All I'm looking for are some knobs in Tomcat that we > >>>can turn to affect its performance, either observed by different groups of > >>>requests or by all the requests on a whole. If there are no such knobs at > >>>all, would it be possible to amend the current Tomcat with it? > >>> > >>> Any advices (or at least what readings I should do to acquire that > >>>knowledge) would be greatly appreciated. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]