What is the recommended python module for SQL database access?

[Asaf Las]

On Tuesday, February 11, 2014 4:57:30 AM UTC+2, Walter Hurry wrote:
> Chris Angelico wrote:
> >
> > And definitely don't go for a non-free option (MS-SQL, DB2, etc)
> > unless you've looked into it really closely and you are absolutely
> > thoroughly *sure* that you need that system (which probably means you
> > need your app to integrate with someone else's, and that other app
> > demands one particular database).
> >
> 
> I agree 100% with this. And speaking as an ex Oracle and DB2 DBA - 
> not to mention MS-SQL (spit), with which I occasionally had to dabble, 
> avoid them like the plague unless circumstances dictate.

What is about clustering? Do we have such option for free alternatives?

Thanks