On Wed, 2003-07-09 at 14:14, Michael A Nachbaur wrote:
> So, I'm looking at syncronizing 4 tables from one master database to several
> child databases. I'm thinking of doing the following with DBD::Multiplex:
>
> DELETE FROM TableA;
> INSERT INTO TableA (..) VALUES (...);
> ....
>
> on all the child databases, but I'm not sure what kind of impact this would
> have on my servers. My impression is that this would hammer the indexes, and
> might blow any memory optimization out the window. Only a few records in my
> dataset will change from time-to-time, but just the process of determining
> what is different may take more effort than simply rebuilding.
Keep a timestamp associated with each record. Only update the records
with timestamps later than your last sync.
--
Cliff Wells, Software Engineer
Logiplex Corporation (www.logiplex.net)
(503) 978-6726 (800) 735-0555