Terracotta Discussion Forums (LEGACY READ-ONLY ARCHIVE)

A. How to use Admin console.

1) what is Object Flush rate,Object fault rate, Transaction Rate, cache miss rate etc.
2) Garbage collection
3) roots->tc:spring_context
4)root->tc:spring_info

B. Another question: Terracotta JMX server listen on port 9520 and it is accessible from evey machine within the domain. how to provide security so only intended admin console with user name and password can only access Terracotta JMX server on port 9520.
and how to change the default port 9520.

In start-tc-server.bat
com.tc.server.TCServerMain -f <PATH TO TC-CONFIG FILE>tc-config.xml

content of tc-config.xml
----------------------------
<server name="Active" host="localhost:9511">
<data>/usr/server-data</data>
<logs>/usr/logs/server-logs</logs>
<jmx-port>9521</jmx-port>
<dso-port>9511</dso-port>
<dso>
<persistence>
<mode>permanent-store</mode>
</persistence>
</dso>
</server>

I think <authentication> Tag is not available in version 2.2.1

Hi Navneet,

I see from your subsequent post that you discovered how to change the jmx port. Meanwhile, an excellent description of the features of the admin console can be found here:

http://www.terracotta.org/confluence/display/docs1/Terracotta+Console+Guide

Hi Navneet,

To answer your other question, once configured, authentication is required via any JMX access, not just the admin console.

Thanks for reply.
my question is

1) how to provide authentication at JMX Server since there is no <authentication> Tag in version 2.2.1 for tc-config.xml file.

2) Can I use another JMX Client (Browser based) to view JMX Server.if yes, suggest few good JMX Clients.

3) In case of Active/Passive Server configuration for failover, how could I be know when the active server is down and I have to restart it since I am not monitoring it constantly. Is there any Notification available.

1) 2.2.1 doesn't support authentication. It is a new feature in 2.3

2) Not sure. You could use jconsole that ships with Java, or try out an opensource monitoring tool like Hyperic.

3) I believe a tool like Hyperic would know that the active server is down since it would lose it's JMX connection and you could set it up to restart it like any other monitored process.

I'm pretty sure the new cluster events stuff in 2.3 can tell you when the server goes down. I'm still researching how it works to write the docs. Alex V. might be best able to answer this one.

You can find a description of cluster membership events (client connect and disconnect for now) at

http://www.terracotta.org/confluence/display/docs1/Concept+and+Architecture+Guide#ConceptandArchitectureGuide-ClusterEvents
and
http://www.terracotta.org/confluence/display/wiki/Cluster+Membership+Events

Cheers
Iyer