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