Re: [infinispan-dev] introducing an artificial network delay

I have used this technique in some other tests as well. Have a look at RehashAfterPartitionMergeTest, for example, on line 39: http://viewvc.jboss.org/cgi-bin/viewvc.cgi/infinispan/trunk/core/src/test... Perhaps it makes sense to wrap this stuff up in a helper method on TestingUtil so it can be reused easily, perhaps something like:

public DISCARD addDISCARD(Cache c) { ... } and public DELAY addDELAY(Cache c) { ... } ? We'd probably want the reverse as well: public void removeDISCARD(Cache c) { ... } public void removeDELAY(Cache c) { ... } On 6 Jul 2010, at 13:54, Bela Ban wrote: > > > Sanne Grinovero wrote: >> Hello, >> I'm running some performance tests; my goal is to alter the code for >> the Lucene Directory to use optimal batching and Flags, but to make >> sure I'm improving performance for DIST and REPL configurations the >> only option I'm having is to run it on a real cluster, which is not >> doable right now. >> >> So as I'm running tests on my laptop, network IO is not real and I >> suppose it's not representative of real life bottlenecks. >> >> Is there some option I could set in the jgroups configuration to >> introduce an arbitrary delay, > > Yes, DELAY ! :-) > > Options in_delay and out_delay add some ms to every incoming or outgoing > message. Take a look at the code, DELAY is only ~ 80 lines, so you could > also write your own, which introduces varying delays. > >> or even some degree of random packet losses? > > Yes, DISCARD ! Use 'up' and 'down' to introduce random discards, e.g. > DISCARD up=".4" means that 40% of incoming messages are discarded. > > > -- > Bela Ban > Lead JGroups / Clustering Team > JBoss > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev -- Manik Surtani manik(a)jboss.org Lead, Infinispan Lead, JBoss Cache http://www.infinispan.org http://www.jbosscache.org _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev