http://www.datastax.com/support-forums/topic/multiple-opscenter-agents Software, Support, and Training for Apache Cassandra en-US Fri, 24 May 2013 15:05:49 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/multiple-opscenter-agents#post-6340 Fri, 07 Sep 2012 17:40:29 +0000 thobbs 6340@http://www.datastax.com/support-forums/ <p>Perhaps the most important thing is to use dedicated disks for each Cassandra node, if possible. I don't think there are many best practices that apply to virtualized environments in general beyond that.</p> <p>For benchmarking, I suggest using the cassandra-stress tool that comes with Cassandra packages. </p> http://www.datastax.com/support-forums/topic/multiple-opscenter-agents#post-6334 Fri, 07 Sep 2012 14:28:46 +0000 schalla 6334@http://www.datastax.com/support-forums/ <p>Thank you Nick. Are there any best practices/benchmarks that you can point on running Cassandra in a virtualized environment? </p> http://www.datastax.com/support-forums/topic/multiple-opscenter-agents#post-2756 Fri, 06 Jul 2012 16:48:44 +0000 nickmbailey 2756@http://www.datastax.com/support-forums/ <p>Schalla,</p> <p>First I will note that running multiple cassandra servers on a single host is not recommended. If it is necessary it is often easier to use virtualization to simulate multiple servers. What you are looking to do is possible though.</p> <p>You will need to run multiple agents on the Cassandra servers, yes. You can install multiple agents when using the manual agent installation. You should follow the process described here:</p> <p><a href="http://www.datastax.com/docs/opscenter/agent/agent_tar" rel="nofollow">http://www.datastax.com/docs/opscenter/agent/agent_tar</a></p> <p>You will need to install each agent to a different location on the machine. You will also need to make a manual change to the conf/address.yaml file. You should add the following lines to each file:</p> <p>local_interface: &lt;listen_address&gt;<br /> jmx_port: &lt;port&gt;</p> <p>The &lt;listen_address&gt; above should be replaced with the configured listen_address from your cassandra.yaml depending on which cassandra instance the agent should monitor. Additionally each cassandra will need to use a different jmx port in order to run on the same host. You should use the correct port accordingly.</p> <p>-Nick </p> http://www.datastax.com/support-forums/topic/multiple-opscenter-agents#post-2641 Tue, 03 Jul 2012 16:52:26 +0000 schalla 2641@http://www.datastax.com/support-forums/ <p>I have two servers (ServerX and ServerY). I need to run multiple Cassandra instances on a given server (say Serverx). Do I need to run multiple OpsCenter agents to collect data on each Cassandra node? If so please point me to the documentation for OpsCenter server/agent. Here is the environment detail.</p> <p>RHEL 5.8<br /> OpsCenter 2.1 </p>