Thanks but I can't justify using Weblogic for this application because I don't need most of the features you described as I mentioned at the end of my mail.
I'm looking to get the most out of Apache/Tomcat combination in a distributed environment. I'm prepared to code a session persistence manager to write to a database if that's required. Thanks, d. Swapnonil Mukherjee wrote: > Dear David, > Your question sounded very interesting to me. I have been able to configure full >fail-over, loadbalancing and session migration from server to server, but not with >Apache-Tomcat combo but with Weblogic6.1 as well as 7.0(B) > Now provided you do not want to buy any load balancer hardware this what you may >have to do. > > Basically what clients look for are 3 things > 1.A server failure scenario where server A handling the session shuts down and >server B manages to sense this failure and starts handling the interupted session. >The user is not even aware that a server failure has occured. > 2. Persistence of session data.(db or file) > 3. Load balancing of requests. > > In order to achieve all of the above, if you think logically you need a top level >manager to control > 1. Replication of the session variable under all servers. > 2. Balance Loads. > > Weblogic does that gracefully by providing you with servlet contained under examples >directory (weblogic 7.0). You will need to configure an admin server, one or more >managed server and put all of the above in a cluster. Then you deploy the example >servlet in that cluster and then you deploy your webapp in the same cluster.In fact >if you read their manuals http://e-docs.bea.com, it's all there. > > This allows you store session data (in serialised form) in a databse,file. Migrate >session in case of failure and Balance Load. > > The morale of the story: > 1.Clustering, Session Persitence, Load Balancing are all App server specific and a >free product like Tomcat can never provide that kind of support to us. > 2.Infact one the major reasons as to why these Weblogic guys make loads of money is >bcoz of these great built in supports. > > -- > Get your free email from www.linuxmail.org > > > Powered by Outblaze > > ___________________________________________________________________________ > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff SERVLET-INTEREST". > > Archives: http://archives.java.sun.com/archives/servlet-interest.html > Resources: http://java.sun.com/products/servlet/external-resources.html > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html > > > -- David Mossakowski [EMAIL PROTECTED] Instinet Corporation 212.310.7275 ******************************************************************************* <<Disclaimer>> This message is intended only for the use of the Addressee and may contain information that is PRIVILEGED and/or CONFIDENTIAL or both. This email is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this email is not an intended recipient, you have received this email in error and any review, dissemination, distribution or copying is strictly prohibited. If you have received this email in error, please notify the sender immediately by return mail and permanently deleting the copy you received. Thank you. ******************************************************************************* ___________________________________________________________________________ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
