On Tue, Mar 16, 2004 at 02:48:26PM -0000, [EMAIL PROTECTED] wrote: > > Greg, > As an aside our team will be looking at apache2 and tomcat5 sooner rather > than later as it would appear that more development effort is taking place > on these platforms. However balancing lots of apps and infrastructure > upgrades and testing with day to day support means this will not happen > soon.
I went through the process of upgrading our servers to Apache2 over the last 9 months. These are Sun servers running Solaris and using the Apache 2 worker MPM. There are alot of advantages to upgrading. My testing found Apache 2 to require a great deal fewer system resources (CPU,memory) when using the worker MPM and be much more scaleable. I also like the way filters work. You can now have Tomcat generate HTML with SSI which mod_include can then parse. This can help scaling for Tomcat. We use it with Tomcat4 and mod_jk 1.2.5, both are working very reliably for us. I did run into a number of problems at first. Most of them were Solaris specific. And some bugs which caused problems. I ended up learning a whole lot more about apache internals than I really wanted to, and even submitted a number of patches which got rolled into later releases. All in all it is working pretty well for us but we still get some core dumps once in a while, nothing that causes apache to completely fail though. We do have one nasty bug we hope the 2.0.49 release will fix. That is a runaway apache process which consumes all memory on the server. That was pretty nasty until we used ulimit on solaris to limit the size of the data and virtual memory segments for apache processes. Now the infrequent times this bug is triggered the apache process core dumps when it hits these memory limits rather than causing general failures on the server due to exhausing all physical and virtual memory. The biggest effort had to be put into making sure all the third party apache modules we use were thread safe. This included patches to mod_jk 1.2 to fix a few thread safe problems. The mod_jk 1.2.5 includes all these patches. All in all it was worth the effort, 9 months later it should be easier for someone with a similar environment to mine to upgrade to apache 2. Regards, Glenn ---------------------------------------------------------------------- Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder | MOREnet System Programming | * if iz ina coment. | Missouri Research and Education Network | */ | ---------------------------------------------------------------------- --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
