Re: In the belly of the beast (MySQLCon)

On Fri, Apr 18, 2008 at 9:04 PM, Joshua D. Drake <jd(at)commandprompt(dot)com> wrote:
> On Fri, 18 Apr 2008 14:59:34 -0400
> Alvaro Herrera <alvherre(at)commandprompt(dot)com> wrote:
>
> > I find it pretty unlikely that Slony would be unable to help you
> > upgrade here. Obviously you can upgrade one database at a time.
> >
> > Also, mostly it's not the database size what's a concern, but rather
> > the size of the largest table.
>
> As I recall (I could be wrong) Slony syncs the whole set as a single
> transaction. So if he has his entire database as a set he may
> have a problem regardless of the largest or smallest table. I would also
> agree that 30 million rows is likely not a problem but he should still
> check his velocity.

Well, you can sync one table at a time (create a (temporary) set with
one able, subscribe it, SYNC, MERGE SET, rince, lather, repeat). :)

Regards,
Dawid