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Subject Re: Multiple geronimo instances with little disk usage
Date Wed, 30 Nov 2005 21:51:33 GMT
I have thought some more about this issue and I want to propose something.

The distribution has the following main directories, size shown in 

bin 32 
config-store 30124
doc 224 
doc/plan 220 
lib 3544
lib/endorsed 1084 
lib/ext 4 
repository 43596 
schema 624 
var 2896 
var/catalina 108 
var/config 64 
var/derby 1740 
var/ldap 4 
var/log 916 
var/security 24 
var/txlog 36

On a linux box with several developers, it appears to me from playing with 
Geronimo that each developer
only needs these:

config-store 30124 
var 2896 
var/catalina 108 
var/config 64 
var/derby 1740 
var/ldap 4 
var/log 916 
var/security 24 
var/txlog 36

The rest could be stored in one place, e.g. /usr/local/geronimo.

For this to work you could set a property, e.g.


And as a default for geronimo.base you can use bin/..

Your thoughts on this?

David Jencks <>
11/24/2005 11:28 AM
Please respond to user

        Subject:        Re: Multiple geronimo instances with little disk usage

This is not supported yet, but it definitely should be.

The idea is that everything except the var directory is shared between 
server instances, and each instance has its own var directory.  So, 
there are several gbeans with paths into the var directory: several are 
in the j2ee-system plan.  Some other gbeans in plans such as 
system-database and activemq-broker also store stuff in var.  The major 
problem at the moment is that most of these gbeans are in the system 
plan which is loaded before the config.xml file, so there is no 
opportunity to replace the "var" with the location of your choice. 
Unfortunately this means you have to build a whole set of 
configurations for each server, since the name of the base config is 
going to be different.

Does anyone have a good idea how to make this work with only a single 
set of configurations?  one possibility would be to have ServerInfo 
know where the var directory is, all gbeans that use var ask ServerInfo 
where it is, and have ServerInfo read it from a system property.  Then 
you could set the var location on the command line.  You can already 
set the config.xml on the command line, although this might not be 
needed if the var location could be set.  The only disadvantage I've 
thought of with this plan is that it builds the concept of the var 
directory into geronimo in a much more fundamental way than it is now.

david jencks

On Nov 24, 2005, at 11:11 AM, wrote:

> I would like to do this:
> 1) Unpack the geronimo distribution under /usr/local/geronimo (say) 
> and make it read-only.
> 2) Create many small _instances_ of geronimo running on all different 
> (sets of) ports, on the same machine.
> I would like the _code_ to be in one place, but the configurations of 
> the instances to all be different.
> Basically a lot like tomcat.
> Thanks
> Guglielmo
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