One of the applications that I’m working on uses archived documents, there is no NoSQL here, just plain tiff files with indexes in Oracle database. Everything related to document access, permissions, conversions, watermarking, security, encryption … is managed by the application itself. So I had to keep my cluster permanently connected to a SAN storage [...]

In an ideal system architecture using load balancers in separate nodes is preferred, however it’s also possible to have your load balancers in the same nodes with your applications. I have used in this architecture the same hardware as the previous Master/Master MySQL cluster, including Ubuntu server 10.04 x64, Apache2 as web server, two nodes [...]