On Tue, Aug 10, 2004 at 10:38:31AM -0700, Henri Asseily wrote:
>
> >* The DBD::Multiplex driver is intended to enable a wide range of
> >dynamic functionality including support for various high-availability
> >and load-balancing scenarios. The old version has been used
> >successfully but was limited. It's being rewritten to greatly
> >increase its flexibility and has great potential, but development
> >has stalled.
>
> I did a lot of work on the high-availability side of things with my
> DBIx::HA module, which is very crude (pure-perl and subclasses DBI
> instead of doing it at the driver level), but it works well in very
> high load production environments. I haven't yet published my latest
> version to CPAN because it can't work until DBI has the
> set_internal_handle() function. I could do it by adding the C code for
> it in DBIx::HA but it's ugly.
It occurs to me that it might be possible to do this in pure (but ugly) perl.
Something along these lines:
$src_inner = tied %$src_h;
untie %$dst_h;
sub Dummy::TIEHASH { return $_[1] };
tie %$dst, Dummy, $src_inner;
But you'd probably still get core dumps due to internal pointers
not getting updated.
> In any case, I'd be interested in helping out on the DBD::Multiplex
> driver. Is there some source I can look at?
Soonish. Once I branch off DBI v1 development I'll put DBD::Multiplex
into the source tree. Tom Kishel [CC'd] is once again looking after it
for me (and trying to understand the changes I've made meanwhile :).
Tim.
