Re: In the belly of the beast (MySQLCon)

On Apr 18, 2008, at 2:04 PM, Joshua D. Drake 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.

FWIW, Londiste doesn't work with sets and, instead, maintains
replication state, as well as giving you the option to add/remove
tables from replication, on a table-by-table which can be observed
from the command line.

Erik Jones

DBA | Emma®
erik@myemma.com
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