Re: In the belly of the beast (MySQLCon) - Mailing list pgsql-general

On Fri, Apr 18, 2008 at 9:04 PM, Joshua D. Drake <jd@commandprompt.com> wrote:
> On Fri, 18 Apr 2008 14:59:34 -0400
>  Alvaro Herrera <alvherre@commandprompt.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