Comments on: Saving database cycles http://blog.markturansky.com/archives/14 software architecture & engineering, code hints, sometimes philosophy, photography, life, etc. Sun, 20 Jun 2010 07:51:38 -0400 http://wordpress.org/?v=2.8.6 hourly 1 By: Mark http://blog.markturansky.com/archives/14/comment-page-1#comment-3 Mark Sat, 22 Dec 2007 06:12:45 +0000 http://blog.markturansky.com/archives/14#comment-3 I could edit this post, but I don't want to mess with history... I was wrong in saying RAC is a chatty cluster. The nodes communicate via shared disk. RAC is usually backed by a SAN, and it is in our case. There is still some chattiness because each node has a memory cache, but most updates happen via shared disk. The question still remains though... what to do when your clustered database is at 50% capacity? More on this in future posts. I'm growing my understanding of a <a href="http://www.terracotta.org" rel="nofollow">very cool technology</a> that might just make the whole thing very easy. I could edit this post, but I don’t want to mess with history… I was wrong in saying RAC is a chatty cluster. The nodes communicate via shared disk. RAC is usually backed by a SAN, and it is in our case. There is still some chattiness because each node has a memory cache, but most updates happen via shared disk.

The question still remains though… what to do when your clustered database is at 50% capacity? More on this in future posts. I’m growing my understanding of a very cool technology that might just make the whole thing very easy.

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