On Tuesday 15 July 2003 07:38 pm, Martin Sarsale wrote:
> Dear all: we're trying to choose a db for our site. We're a little bit
> worried about the load of the server so we were thinking in some kind of db
> cluster.
>
> Mysql has a built-in way to do this but I found that pg relies on external
> utilities. How good are they? Are they ready for production-servers?
>
Well, there are a lot of external replication solutions available, so saying how good they are depends on which one
yourdiscussing. I have heard anectdotal evidence about all (most anyway) of them being used in production situations,
butI don't think any of them have had extensive testing. There is a commercial replication solution that has had
extensiveenterprise use available at http://www.erserver.com/. The company plans to open source it "real soon now" but
asof yet you need a commercial license for it (which comes with support, so might be a good deal for you).
I also have to mention that postgresql tends to scale a lot better than mysql so youre far less likely to need
replicationfor scaleability, especially in multi-user, multi-write type environments. This is one of the reasons that
it'staken so long for postgresql to get a "built in" replication solution, the need isn't strong enough to get the itch
scratched.
Robert Treat