From RedBean

Multi DB

Since 2.0 you can use multiple database with the easy to use facade like this:

$databases = array(
"database1" =>
array("dsn"=>"sqlite:lite1","username"=>"","password"=>"","frozen"=>false),
"database2" =>
array("dsn"=>"sqlite:lite2","username"=>"","password"=>"","frozen"=>false),
);

$dbs = R::setupMultiple($databases);

$r1 = $dbs["database1"];
$book = $r1->dispense("book");
$book->title = "ONE";
$id1 = $r1->store($book);

$r2 = $dbs["database2"];
$book = $r2->dispense("book");
$book->title = "TWO";
$id2 = $r2->store($book);

echo $r1->load("book",$id1)->title.$r2->load("book",$id2)->title;