SHOW ENGINES;

or 

SELECT * FROM information_schema.ENGINES;


You will see "YES" in the 'support' column of the output for 'InnoDB.  It is actually XtraDB, but it identifies itself as InnoDB (for portability and compability reasons).


Peter



On Mon, May 23, 2011 at 18:46, Adam M. Dutko <dutko.adam@gmail.com> wrote:
> I am curious, if XtraDB is turned on / installed by default when
> MariaDB is

I'm inclince to believe it ships with the Windows version by default
although you need to be explicit when creating your tables/databases
which engine you want to use with the ENGINE= clause.

Please see the release notes:

http://kb.askmonty.org/v/mariadb-5153-release-notes

http://kb.askmonty.org/v/mariadb-526-release-notes

> Is this default behavior the same in 5.1.53 and 5.2.6?

Not certain but I'm inclined to say "yes" because of the release notes.

> How can I tell if XtraDB is currently installed on any given MariaDB

show engines;

HTH

-Adam

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