On the other end of the spectrum we have ERP APPS where design with thousands of tables per module are the norm and the UNION ALL joins span a multi-page printout. In these types of applications Oracle RAC’s “share everything” approach is clearly superior, scratch that, it’s the only solution, period.

For an interesting read on this specific issue take a look at Kevin Closson’s post titled “Nearly Free or Not, GridSQL for EnterpriseDB is Simply Better Than Real Application Clusters. It is Shared-Nothing Architecture After All!” and a sort of reply to it by a blogger called “bonglonglong” titled “All in the assumptions“.

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