Re: Cluster configuration
This document will be of help: http://kb.atlassian.com/content/orion/docs/http-clustering.html Cheers, Scott sbpodila wrote: Hi all, Can anybody explain the procedure for cluster configuration in Orion server for web applications. -- Scott Farquhar :: [EMAIL PROTECTED] Atlassian :: http://www.atlassian.com Supporting YOUR J2EE World
RE: Cluster configuration
Thanks elephatwalker :) elephantwalker [EMAIL PROTECTED] on 07/07/2001 01:21:20 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: RE: Cluster configuration another resend...didn't catch second time around... -Original Message- From: elephantwalker [mailto:[EMAIL PROTECTED]] Sent: Friday, July 06, 2001 11:41 PM To: Orion-Interest Subject: RE: Cluster configuration resend...didn't catch the first time around... -Original Message- From: elephantwalker [mailto:[EMAIL PROTECTED]] Sent: Friday, July 06, 2001 8:43 PM To: Orion-Interest Subject: RE: Cluster configuration Gurinder, The clusters are setup just to lighten the multi-cast traffic. That is, if every server was sharing its http sessions with every other server, you can see how the power of e and factorial are related. (sigma (1/n!)) == e. So instead of the traffic being proporational e^s, where s is the number of sessions, the traffic is proportional to s*n!, where n is the number of servers in a cluster. If a cluster has three servers, this seems to be a good comprimise between redundancy and multi-cast traffic. The loadbalancing bit randomly picks servers ... not clusters. So if one server goes down or is removed, another server in its same cluster takes over. This is the fail-over policy. regards, the elephantwalker -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Gurinder Randhawa Sent: Friday, July 06, 2001 5:14 PM To: Orion-Interest Subject: Re: Cluster configuration Thanks for the response Jeff, what i wanted was first and foremost was if one orion instance fails another one to kick in with session replication. This sounds like a cluster island. I guess thats all i want. But isn't a cluster-island used only for fault tolerance that is if one instance fails another one on the island picks it up with session replication ? Can you distribute (load balance) in one cluster-island or do u need multiple cluster islands? I want fault tolerance and load balancing between instances (is this multiple cluster islands ?). What would be the best setup for this ? Sorry i think i might be just confusing myself more. If you could clear this up a little it would be great. Thanks a bunch Gurinder Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
Another question in regards to Apache running in front of the load balancer. How does apache send requests via mod_proxy (ProxyPass...) to loadbalancer ? Is there any xtra config required or do you just specify loadbalancer port in httpd.conf file ? Gurinder Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
I have managed to setup a cluster-island with a loadbalancer. I have a web-app that is shared. I am running Apache in front of Orion. I can start everything fine except for 2nd instance of orion in cluster i get the error: Error starting JMS-Server: Unable to bind socket: Address already in use Error starting RMI-Server: IO Error: Address already in use Warning: Error reading transaction-log file (/oracle/app/oracle/product/oas9i/Apache/j2ee_2/home/persistence/transactio n.state) for recovery: premature end of file Where can i change the ports for these or how would i resolve this ? Also i have apache running on port 80 and i would like to run loadbalancer on another port. Would i specify this port in the loadbalancer.xml file or at startup command line for loadbalancer ? Is it recommended to run loadbalancer on port 80 ? Cheers Thanks Gurinder Randhawa Travel Underwriters IS department Web Programmer/Analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
In regards to my last email i have changed RMI and JMS ports fine and i got rid of Address already in use message upon Orion instance startup. However i still cannot shutdown the processes properly. I have also noticed multiple Loadbalancer processes running, I don't know how though ? Any ideas or suggestions on starting and shutting down orion instances and loadbalancer on same physical host ? Thanks Gurinder Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
RE: Cluster configuration
a resend... as far as stopping orion, the usual methods apply java -jar admin.jar ormi://localhost:the_rmi_port_number_for_the_instance_to_shutdown admin somepassword -shutdown force as for the loadbalancer, kill -s 9 pid seems to be the only thing that works. -Original Message- From: elephantwalker [mailto:[EMAIL PROTECTED]] Sent: Monday, July 09, 2001 6:21 PM To: Orion-Interest Subject: RE: Cluster configuration Its not the orion port, its the ormi, or rmi port that's complaining and the jms port that's complaining. If you set up more than one instance of orion on the same machine, you will need to change the jms and rmi port's in their respective config files so that there is no conflict. I think 23791 is the rmi port by default, and 9127 is the jms port by default. You can change these by changing the config/rmi.xml and config/jms.xml file settings. See these links for the docs: http://www.orionserver.com/docs/jms.xml.html http://www.orionserver.com/docs/rmi.xml.html regards, the elepantwalker -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Gurinder Randhawa Sent: Monday, July 09, 2001 4:36 PM To: Orion-Interest Subject: Re: Cluster configuration I have managed to setup a cluster-island with a loadbalancer. I have a web-app that is shared. I am running Apache in front of Orion. I can start everything fine except for 2nd instance of orion in cluster i get the error: Error starting JMS-Server: Unable to bind socket: Address already in use Error starting RMI-Server: IO Error: Address already in use Warning: Error reading transaction-log file (/oracle/app/oracle/product/oas9i/Apache/j2ee_2/home/persistence/transactio n.state) for recovery: premature end of file Where can i change the ports for these or how would i resolve this ? Also i have apache running on port 80 and i would like to run loadbalancer on another port. Would i specify this port in the loadbalancer.xml file or at startup command line for loadbalancer ? Is it recommended to run loadbalancer on port 80 ? Cheers Thanks Gurinder Randhawa Travel Underwriters IS department Web Programmer/Analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
RE: Cluster configuration
another resend...didn't catch second time around... -Original Message- From: elephantwalker [mailto:[EMAIL PROTECTED]] Sent: Friday, July 06, 2001 11:41 PM To: Orion-Interest Subject: RE: Cluster configuration resend...didn't catch the first time around... -Original Message- From: elephantwalker [mailto:[EMAIL PROTECTED]] Sent: Friday, July 06, 2001 8:43 PM To: Orion-Interest Subject: RE: Cluster configuration Gurinder, The clusters are setup just to lighten the multi-cast traffic. That is, if every server was sharing its http sessions with every other server, you can see how the power of e and factorial are related. (sigma (1/n!)) == e. So instead of the traffic being proporational e^s, where s is the number of sessions, the traffic is proportional to s*n!, where n is the number of servers in a cluster. If a cluster has three servers, this seems to be a good comprimise between redundancy and multi-cast traffic. The loadbalancing bit randomly picks servers ... not clusters. So if one server goes down or is removed, another server in its same cluster takes over. This is the fail-over policy. regards, the elephantwalker -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Gurinder Randhawa Sent: Friday, July 06, 2001 5:14 PM To: Orion-Interest Subject: Re: Cluster configuration Thanks for the response Jeff, what i wanted was first and foremost was if one orion instance fails another one to kick in with session replication. This sounds like a cluster island. I guess thats all i want. But isn't a cluster-island used only for fault tolerance that is if one instance fails another one on the island picks it up with session replication ? Can you distribute (load balance) in one cluster-island or do u need multiple cluster islands? I want fault tolerance and load balancing between instances (is this multiple cluster islands ?). What would be the best setup for this ? Sorry i think i might be just confusing myself more. If you could clear this up a little it would be great. Thanks a bunch Gurinder Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
Thanks for the response Jeff, what i wanted was first and foremost was if one orion instance fails another one to kick in with session replication. This sounds like a cluster island. I guess thats all i want. But isn't a cluster-island used only for fault tolerance that is if one instance fails another one on the island picks it up with session replication ? Can you distribute (load balance) in one cluster-island or do u need multiple cluster islands? I want fault tolerance and load balancing between instances (is this multiple cluster islands ?). What would be the best setup for this ? Sorry i think i might be just confusing myself more. If you could clear this up a little it would be great. Thanks a bunch Gurinder Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
Re: Cluster configuration
If you use Orion's load balancer, it will distribute between multiple instances in the same cluster-island. So, if you use one cluster island with multiple servers (instances) running in it, and a load balancer as a front-end, then you will get fault tolerance if one (or more) instances of Orion goes down, plus load balancing between the instances runnning in that cluster-island. If you start up both the load balancer and orion instances with debugging on (I believe the parameters to pass are in the clustering readme), you will see all the output of both of these operations. Jeff. On Fri, 6 Jul 2001 17:14:25 -0700 Gurinder Randhawa [EMAIL PROTECTED] wrote: Thanks for the response Jeff, what i wanted was first and foremost was if one orion instance fails another one to kick in with session replication. This sounds like a cluster island. I guess thats all i want. But isn't a cluster-island used only for fault tolerance that is if one instance fails another one on the island picks it up with session replication ? Can you distribute (load balance) in one cluster-island or do u need multiple cluster islands? I want fault tolerance and load balancing between instances (is this multiple cluster islands ?). What would be the best setup for this ? Sorry i think i might be just confusing myself more. If you could clear this up a little it would be great. Thanks a bunch Gurinder Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 02:14:04 PM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration A cluster-island is just a cluster, because session replication doesn't happen between cluster-islands, just inside it. So yes, you need at least 2 instances per cluster-island, and yes you install 2 separate orion instances with the same cluster id in the web-site.xml. I didn't run any benchmarks on my cluster setup, it was more just a proof-of-concept. Is there a reason you want 2 cluster-islands? because they won't share session information with eachother. Jeff. Gurinder Randhawa wrote: One other question i had was...when you setup a cluster-island do you install 2 seperate orion instances with same cluster id in web-site.xml ? We are setting up 2 cluster-islands witha load balancer running behind apache on same host (one physical sun box) for one web-application. So to add to my question above for 2 cluster-islands do we need to run 4 instances of orion or just 2 ? The documentation wasn't clear to me on this I have it working for a single instance of orion but need to do clustering for scalability and fault tolerance issues. How does this perform ? Thanks Gurinder Randhawa Travel Underwriters Group Of Companies IS Department, Senior programmer/analyst Jeff Hubbach [EMAIL PROTECTED] on 07/06/2001 07:31:33 AM Please respond to Orion-Interest [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] cc:(bcc: Gurinder Randhawa/Travel Underwriters) Subject: Re: Cluster configuration There's a very nice how-to at: http://www.orionserver.com/docs/http-clustering.html Jeff. Alessandro Fustini wrote: Hi, I woul like configure a Orion cluster with 2 PC. Is it only necessary change orion/application-deloyments/ default/defaultWebApp/orion-web.xml file with cluster-config / add ?? Thanks a lot for all help Alessandro Fustini Java Developer e-mail: [EMAIL PROTECTED] -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com -- Jeff Hubbach Internet Developer New Media Designs, Inc. www.nmd.com
