Bruno, > Which brings up another question: why not just cluster at the hardware > layer? Get an external fiberchannel array, and cluster a bunch of dual > Opterons, all sharing that storage. In that sense you would be getting > one big PostgreSQL 'image' running across all of the servers. > > Or is that idea too 90's? ;-)
No, it just doesn't work. Multiple postmasters can't share one database. LinuxLabs (as I've gathered) tried to go one better by using a tool that allows shared memory to bridge multple networked servers -- in other words, one postmaster controlling 4 or 5 servers. The problem is that IPC via this method is about 1,000 times slower than IPC on a single machine, wiping out all of the scalability gains from having the cluster in the first place. -- --Josh Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]