Basically you can connect one apache to several tomcats today. I have a configuration with two Apache's connected to 4 Tomcats: Load-balancing switch points the user either to Machine A or B (Assuming both up and running). Machine A: 1. Apache + mod_jk 2. Tomcat A_1 3. Tomcat A_2 Machine b: 1. Apache + mod_jk 2. Tomcat B_1 3. Tomcat B_2 Mod_jk on each machine forward requests based on sessionID to the right tomcat (this is my patch to 3.2b7). New sessions being created on local machine only (using lbfactor). The problem I want to solve with session replicator is the ability to let the system continue working after Tomcat A_1 got down. Basically I'm working on patch lets tomcat a_1 replicates its sessions to tomcat a_2 (or any other), while letting mod_jk to aware of that. Whenever request with sessionID points to tomcat a_1 arrives to mod_jk he forward it to (A_1's buddy) a_2 if (the master) a_1 in unavailable. THE NEW IDEA is, assuming all of what I have stated above is working. We can take apache out of the picture. HOW COME? I can point the load-balancing switch to the tomcat themselves. Each tomcat will forward requests based on sessionID (we will need to move mod_jk client side to into tomcat. Dan, would you like to take that?) is the exist to the right tomcat (if there's no sessionID - will create one locally). If Tomcat can't connect to master, it will forward the request to the buddy. Basically, I'm working on the replication protocol. I can make it stand-alone or put it into mod_jk (server side). If someone willing to write mod_jk client side into http connector, it will allow getting apache out of the picture. M I RIGHT? Community - Share your mind !! ________________________ Shai Fultheim Chief Technology Officer BRM Seed E-Mail: [EMAIL PROTECTED] Mobile: 972-53-866-459 Office: 972-2-5891-459 -----Original Message----- From: GOMEZ Henri [mailto:[EMAIL PROTECTED]] Sent: Friday, December 22, 2000 14:39 To: [EMAIL PROTECTED] Subject: RE: Tomcat session replicator Interesting subject, a farm of Apache behind a larger farm of Tomcats ? Let me develop : Could we have say a farm of X Apache connected to a farm of Y Tomcat where Y = 2 * X or Y = 3 * X ? Also could the session replicator be compatible with eventuals ACL/Crypto in mod_jk/ajp protocols ? "Pour la plupart des hommes, se corriger consiste à changer de défauts." -- Voltaire
