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  $dbh->multi_do_all(  # Loops through every single DB handle.
    sub {
        my $dbh = shift;
        ...
    } );

=head1 DESCRIPTION

This software manages multiple database connections for failovers and also
simple load balancing.  It acts as a proxy between your code and your database
connections, transparently choosing a connection for each query, based on your
preferences and present availability of the DB server.

This module is intended for read-only operations (where some other application
is being used to handle replication).

This software does not prevent write operations from being executed.  This is
left up to the user. See L<SUGGESTED USES> below for ideas.

The interface is nearly the same as other DBI drivers except that it allows you
to specify multiple connections for a single handle.