On Tue, 2010-04-06 at 08:55 -0700, Jim Lloyd wrote: > On Mon, Apr 5, 2010 at 6:57 PM, Bruce Snyder <bruce.sny...@gmail.com> wrote: > > > On Mon, Apr 5, 2010 at 2:48 PM, Jim Lloyd <jll...@silvertailsystems.com> > > wrote: > > > I'm in the process of building a network of brokers in which some of the > > > links are geographically distributed. These links will use the SSL > > transport > > > for reasons of security, but we also want to use compression to minimize > > > bandwidth usage over the WAN links. I've searched the available > > > documentation and so far haven't found a definitive source that tells > > > whether the SSL Transport uses rfc3749 compression or not. Can anyone > > here > > > give me a definitive answer? If it is supported, which configuration > > options > > > are required? > > > > Not only is TLS compression is not supported in ActiveMQ, but I don't > > think it's supported in Java yet. Do you know of an implementation? > > > > No, I don't, but we do the majority of our development in C++ so even though > I hadn't found an implementation in my searches so far I still had hope that > one might exist. Thanks for the clarification. > > > > > > It also appears that there is an option to use message level compression. > > If > > > compression is available on the SSL transport stream, I expect we would > > want > > > to ensure that message compression is turned off to allow the transport > > > level compression to have more context. The only documentation I have > > found > > > for this was for ActiveMQ 3, which implies that doMessageCompression > > > is trueby default. Is that still the default with ActiveMQ 5? > > > > Message level compression can be enabled on a ConnectionFactory or a > > Connection via the useCompression property. See also the > > useCompression option on the URI: > > > > http://activemq.apache.org/connection-configuration-uri.html > > > Thanks. I see the default for useCompression given here is now false. We'll > experiment and see if this gives us any significant improvement. > > > > -Jim
The trunk code of Apache CMS now supports message body compression, so you should be able to test with C++ client's if you build from trunk. Regards -- Tim Bish Open Source Integration: http://fusesource.com ActiveMQ in Action: http://www.manning.com/snyder/ Follow me on Twitter: http://twitter.com/tabish121 My Blog: http://timbish.blogspot.com/
