I am testing config on 3 server (1 apache 2.0.43, 2 tomcat 4.1.12) with the
mod_jk-2.0.43.so
I don't understand how to define good values for the lbfactor to have same of tomcat
session number on the two tomcat server.
Can you help me to define the good value for lbfactory?
Patrick GIRY
Analyst Web
e-mail : [EMAIL PROTECTED]
Phone number : 33 1 64 80 30 91
-Message d'origine-
De : Jackson, Stephen [mailto:[EMAIL PROTECTED]
Envoy : mercredi 19 mars 2003 16:31
A : 'Tomcat Users List'
Objet : RE: Tomcat 4 load balancing
There are lots of solutions for stuff like this. You can get complicated or
very simple. The simple answer is create a common 0 byte file when writing
to the file and delete it when you are finished. Simply check for the
existence of the file.
A more complete solution would be to use an ejb or XML-RPC. XML-RPC is much
simpler than an ejb. This would give you a 3rd JVM for common functionality
across you application. You may not need to go here. You just need to
evaluate how much time you want to spend ( and money ) to create a solution.
-Original Message-
From: Rastislav Vasil [mailto:[EMAIL PROTECTED]
Sent: Wednesday, March 19, 2003 10:10 AM
To: [EMAIL PROTECTED]
Subject: RE: Tomcat 4 load balancing
Hi,
I' sorry, my mystake -
lb is a type of the worker, while it's name is loadbalancer,
I changed following:
default.worker=lb -- default.worker=loadbalancer
worker.list=lb -- worker.list=loadbalancer
Now it works, but I have a question for one of my next steps:
For some operations that write to a file I used to use a SYNCHRONIZED block
of code to be sure to have only one user writing to the file.
Probably that won't work when using 2 Tomcat instances to write to the same
file - am I right?
What is the solution/practise here?
Thanks,
Rasto
-Original Message-
From: Rastislav Vasil
Sent: Wednesday, March 19, 2003 3:58 PM
To: '[EMAIL PROTECTED]'
Subject: Tomcat 4 load balancing
Hi all,
I'm trying to configure 2 Tomcat (4.1.12) instances on different hosts to
serve under single IIS 5 web server.
I defined 2 workers
uriworkermap.properties:
###
default.worker=lb
/examples=$(default.worker)
/examples/*=$(default.worker)
workers.properties:
#
workers.tomcat_home=C:\Tomcat4.1
workers.java_home=C:\jdk1.3.0_01
worker.list=lb
worker.w1.port=8009
worker.w1.host=localhost
worker.w1.type=ajp13
worker.w2.port=8009
worker.w2.host=host2
worker.w2.type=ajp13
worker.w1.lbfactor=1
worker.w2.lbfactor=1
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=w1, w2
###
I get The page cannot be displayed for http://localhost/examples I get
following in isapi.log file:
[Wed Mar 19 15:47:10 2003] [jk_connect.c (143)]: jk_open_socket, connect()
failed errno = 61
[Wed Mar 19 15:47:10 2003] [jk_ajp12_worker.c (152)]: In
jk_endpoint_t::service, Error sd = -1
[Wed Mar 19 15:47:10 2003] [jk_isapi_plugin.c (716)]: HttpExtensionProc
error, service() failed
What I'm trying to do is to have 2 Tomcats servering Java part of a single
application.
What I'm not sure is how to map balanced workers to a single url mapping in
uriworkermap. props.
According docs (http://localhost:8080/tomcat-docs/jk2/jk/workershowto.html)
balanced_workers is a comma separated list of workers that the load
balancer need to manage. These workers should not appear in the worker.list
property. - ... I don't have then there...- so if I'm balancing workers,
should workers.list contain only the name of the load-balancing worker?
To what worker(s) should the url mapping be set to?
Thanks in advance.
Rasto
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