-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Leo,
On 6/16/2010 11:36 AM, Leo Donahue - PLANDEVX wrote: >>> From: André Warnier [mailto:a...@ice-sa.com] >>> Subject: Re: Multiple Tomcat Instances >>> >>> The other part that is confusing me is that what if all users are >>> running a "process" of Tomcat at the same time, I'm assuming they all >>> have to use a separate HTTP port and shutdown port? >>>> >>> You are not confused here. That is correct. >>> If you have several Tomcat /instances/ (actually, they will be instances of >>> java, running Tomcat), >>> not two of them can open the same server port at the same time. >>> If you are running one single instance of Tomcat (of java running Tomcat) >>> with several >>> "virtual hosts" defined in it, then there is only a single shutdown >>> port, and there /can/ be a single HTTP port shared by all virtual hosts >>> (or, just to add some >>> confusion, there can also be several ports :-)). > > RUNNING.txt says: > "... Note that by default Tomcat will first try to load classes and JARs from > $CATALINA_BASE/lib and then $CATALINA_HOME/lib. You can place instance > specific > JARs and classes (e.g. JDBC drivers) in $CATALINA_BASE/lib whilst keeping the > standard Tomcat JARs in $CATALINA_HOME/lib ..." > > The doc didn't mention that Tomcat will calculate a "relative" > reference for files in /lib, a few lines above this quote. I'm > assuming I also need a /lib directory in $CATALINA_BASE then. No, you don't have to have one, but if it's there, Tomcat will prefer the more-specific library(ies) found in CATALINA_BASE/lib to those found in CATALINA_HOME/lib. > If I place copies(?) of bin, conf, logs, webapps, work and temp in my > $CATALINA_BASE directory, then how is that different from just > downloading multiple Tomcat zip files and naming them separately, > changing the startup/shutdown ports on each? If you copy everything, then there is no difference. It's more typical to only create conf/server.xml and a separate webapps directory for the separate instance. The 'work' and 'temp' directories (and "logs"? I haven't checked) will automatically be created for you. Run the scripts from CATALINA_HOME and they will use CATALINA_BASE to figure everything out. Something not yet mentioned that can be done when using CATALINA_BASE is that you can have separate versions of the JVM running the same version of Tomcat, if that's useful to you. For instance, in production, we run 4 separate JVMs - one for each of our primary web applications. Some of those applications haven't yet been tested extensively under Java 6, yet, so we run them on Java 5 instead. > The only thing I'm gaining is only needing the two files in my > $CATALINA_BASE/bin instead of all the other files? What else? What was > the deciding factor to be able to run multiple Tomcat instances? If you use a minimal set of files in CATALINA_BASE, then upgrading multiple (separate) installations of Tomcat is easily done by simply installing a new version of Tomcat into a new directory and running the new startup script. You can even switch-back to the old version fairly easily: run the startup script from the old version instead. ;) - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkwY94cACgkQ9CaO5/Lv0PAaDQCfZxvkggZwz5RFc03vTtd0Oyfp 8AwAnRMMMRLtx7pEeDeveKLBbJCK05p6 =yoAx -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
