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PODatabase replication for redundancy using a free database and a Java with Spring & Hibernate web application
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2009-02-18T11:27:35.487
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2015-03-21T09:22:41.147
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I have this in mind: On each server: (they all are set up identically) <ul> <li>A free database like <a href="http://www.mysql.com/" rel="noreferrer">MySQL</a> or <a href="http://www.postgresql.org/" rel="noreferrer">PostgreSQL</a>.</li> <li><a href="http://tomcat.apache.org/" rel="noreferrer">Tomcat</a> 6.x for hosting Servlet based Java applications</li> <li><a href="http://www.hibernate.org/" rel="noreferrer">Hibernate</a> 3.x as the ORM tool</li> <li><a href="http://en.wikipedia.org/wiki/Spring_framework" rel="noreferrer">Spring</a> 2.5 for the business layer</li> <li><a href="http://wicket.apache.org/" rel="noreferrer">Wicket</a> 1.3.2 for the presentation layer</li> </ul> I place a load balancer in front of the servers and a replacement load balancer in case my primary load balancer goes down. I use <a href="http://www.terracotta.org/" rel="noreferrer">Terracotta</a> to have the session information replicated between the servers. If a server goes down the user should be able to continue their work at another server, ideally as if nothing happened. What is left to "solve" (as I haven't actually tested this and for example do not know what I should use as a load balancer) is the database replication which is needed. If a user interacts with the application and the database changes, then that change must be replicated to the database servers on the other server machines. How should I go about doing that? Should I use MySQL PostgreSQL or something else (which ideally is free as we have a limited budget)? Does the other things above sound sensible? Clarification: I cluster to get high availability first and foremost and I want to be able to add servers and use them all at the same time to get high scalability.
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<java><mysql><database><postgresql><redundancy>
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Database replication for redundancy using a free database and a Java with Spring & Hibernate web application
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1. COHehe, interested in this. I have been considering nearly the same arch (sans Hibernate/Wicket and no Terracotta). PostgreSQL + pgpool seems to be my best bet, I need to run some benchmarks...
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