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Great information. Just what I needed.<br>
I'm about to upgrade the forum.<br>
Hopefully finished in about two hours.<br>
<br>
<br>
Manfred<br>
<br>
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cite="mid:8118C137-7BB6-4FAF-9B32-03A56EDA3261@crosswire.org"
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<td valign="top"><img
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<td style="padding-left: 5px;" valign="top"><a
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href="mailto:dmsmith@crosswire.org" style="color: rgb(0,
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important;">DM Smith</a><br>
<font color="#888888">6. Februar 2011 17:15</font></td>
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<div>FYI,<br>
This week has seen some significant changes in the setup of
tomcat. Troy has implemented partitioning. It's really cool.
Here is an overview of what I found:<br>
<br>
In the past, /opt/tomcat was the running instance. Now it is
merely the binary home, that is it is merely CATALINA_HOME and
no longer also CATALINA_BASE.<br>
<br>
Now the running instances of tomcat are at /opt/tomcat_site1
.. /opt/tomcat_site5.<br>
<br>
The breakdown of the sites:<br>
site1 - all but what's below<br>
site2 - community<br>
site3 - user's accounts, e.g. crosswire.org/~dmsmtih<br>
site4 - forums<br>
site5 - jira<br>
<br>
The admin interface is one for each site, just append the site
number after manager, e.g. crosswire.org/manager5/html.<br>
<br>
Startup/shutdown - All instances are brought up/down together
with the same command as before: /etc/rc.d/init.d/tomcat.<br>
<br>
There is now a new /etc/rc.d/init.d/sitestart.sh and
sitestop.sh. Each of these takes a number from 1 to 5,
corresponding to the site. These are called by
/etc/rc.d/init.d/tomcat.<br>
<br>
In the past when tomcat went rogue and shutting down tomcat
did not kill all the java processes, one had to independently
kill the java processes, e.g. killall java.<br>
<br>
Now this is a bad idea. Each instance should be managed
independently from the other.<br>
<br>
This is accomplished with: sitestop.sh N -force, where N is a
site number.<br>
<br>
Details behind this: The environment variable CATALINA_PID has
the path to the file containing the PID of the java process.
In our implementation it is
CATALINA_PID=$CATALINA_BASE/tomcat.pid. The -force argument is
provided by tomcat for the purpose of killing the process when
it goes rogue.<br>
<br>
This setup allows us to tune instances separately. For
example, JIRA needs memory to be tuned to be much larger than
default, with XX:MaxPermSize, -Xmx, -Xms.<br>
These are now provided in $CATALINA_BASE/bin/setenv.sh.<br>
<br>
Advantages:<br>
CATALINA_HOME no is merely the home for the code. Upgrades are
much simpler. It merely can be replaced.<br>
Each CATALINA_BASE instance is independently managed.<br>
When one of the webapps or the instance goes rogue, it only
affects what is in that one instance.<br>
Each is individually tuned. This allows for a much smaller
footprint for all the instances.<br>
The logs are much easier to understand. So many of the entries
are anonymous. With community, forums, and jira in their own
instances, the logs pertain only to them.<br>
<br>
In Him,<br>
DM<br>
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