You bring up some good points with respect to file descriptors. Any ideas what the maximums are on an OS like linux? I was actually considering modifying the REST Servlet so that it can support durable subscribers and if this was the case then there is potential for a single JVM process to have upwards of 3000 concurrent connections to the MQ server.
Do you see this as being a potential problem? rajdavies wrote: > > > On Feb 14, 2008, at 12:05 AM, davewolfs wrote: > >> >> Hello everyone, >> >> I am hoping that some of you could provide me with some realistic >> numbers on >> the maximum number of Durable Topic subscribers. >> >> I have never worked with Active MQ so I am not familiar with it's >> limits. >> In a production environment what are some realistic numbers for the >> maximum >> durable topic subscribers? >> >> Is ActiveMQ capable of handling durable subscribers in the thousands >> i.e. >> 5000 subscribers or is a number like this pushing the limits. >> >> Please advise. >> >> Thank you, >> >> Dave >> -- >> View this message in context: >> http://www.nabble.com/Maximum-number-of-durable-topics-per-MQ-instance.-tp15471104s2354p15471104.html >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. >> > ActiveMQ certainly is capable of handling a large number of durable > subscribers - but I for one haven't tested the upper limit as yet. > Factors which you need to take into account are: > > 1. A thread is associated with connection - unless you use AIO or NIO > - so you need to ensure that your operating system allocate a large > number of file descriptors per process. If messages cannot be pushed > to the consumer straight away, they are pulled from data store - the > thread from the sending connection - or the thread used to acknowledge > messages from the consuming connection are used to do the polling. > > 2. Each durable subscriber adds a small overhead to the data store - > its worthwhile trying different implementations - JDBC or the default > file based store - to see which one is more suitable to your usage > patterns > > Let us know how you get on! > > > > cheers, > > Rob > > http://open.iona.com/ -Enterprise Open Integration > http://rajdavies.blogspot.com/ > > > > > -- View this message in context: http://www.nabble.com/Maximum-number-of-durable-topics-per-MQ-instance.-tp15471104s2354p15481210.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
