Apollo does this. I think the logs are coming from the leveldb store, so when using with ActiveMQ 5.x it should be the same (but i didn't try yet). It will only log if NOT using the JNI impl.
On Wed, Mar 6, 2013 at 12:35 AM, Claus Ibsen <claus.ib...@gmail.com> wrote: > On Wed, Mar 6, 2013 at 8:00 AM, SuoNayi <suonayi2...@163.com> wrote: > > Also I saw the leveldb-0.2.jar in the extra directory under the lib > directory, seems it's the java LevelDB implement. > > > > I removed the jar from the extra directory and deployed a new broker on > other new CentOS server and restarted the broker, > > but I could still send messages to the new broker and log files created > by LevelDB were present in the specific directory. > > > > I think the leveldb driver/transport has a Java based driver that it > fallback and use if the JNI is not possible/present. > > Though Hiram would be the best person to answer that. > > And yeah if there is something we can make more obvious from INFO > logging when starting the broker which one is in use, that would be > great. > > > > So here I'm more confused about that the broker with removal the > leveldb-0.2.jar is deployed on the new CentOS server without > > LevelDB installation can still work. > > The version is activemq-5.7.0.fuse-71-047. > > > > At 2013-03-06 13:36:46,SuoNayi <suonayi2...@163.com> wrote: > >>Hi , > >>Can we ensure LevelDB store uses a JNI driver or not via logging? > >>I have deployed brokers on two CentOS servers, one server with LevelDB > installation while the other without installation. > >>After changing the logging level to DEBUG, I still can not find logs to > indicate that a JNI driver or a pure java implement is used. > >>On the same server my broker was deployed without LevelDB installation > at first, I use a simple load producer to send massive > >>messages to measure performance,after that I installed LevelDB and > restarted the broker and the load producer. > >>What make me confused is that the performance measure is very close. So > I suspect if the JNI driver is used or not. > >>If not used the java LevelDB will be used?Can I assume the JNI driver > always performs better than the java driver? > >> > >> > >>Thanks, > >>SuoNayi > >> > >> > >> > >> > >> > >>-- > >> > >>Wangyin > >>suonayi2...@163.com > >> > > > > -- > Claus Ibsen > ----------------- > Red Hat, Inc. > FuseSource is now part of Red Hat > Email: cib...@redhat.com > Web: http://fusesource.com > Twitter: davsclaus > Blog: http://davsclaus.com > Author of Camel in Action: http://www.manning.com/ibsen > -- *Christian Posta* http://www.christianposta.com/blog twitter: @christianposta
