tomcat log server

[John Smith]

Hi Guys,

I have tomcat 6.0.29 running different instances on same and different
hardware, I  want to create log server on one system (nfs mount the file
system), so every instance must create log files in that place like
SERVER.catalina.2011-07-30.log, SERVER1.catalina.2011-07-30.log,
SERVER.catalina.out etc. rather than ${catalina.base}/logs

Can some body guide me , really appreciated

Regards

John