Re: [Nolug] Quick question on clustering...

On Wed, 2003-03-26 at 11:02, Craig Jackson wrote:
> But maybe the answer isn't so quick ;)
>
> How is it that web servers can be clustered?

Others correct me if I'm wrong, but, typically, there is 1 computer that
faces the Internet and is a "re-director". It distributes the http
requests across multiple web server boxes.

> How are the databases kept in sync?

It depends. If it's a news site, then the databases are 99.999% read,
and the administrator can easily put the same new articles on a MySQL
database on each machine.
For user-updatable databases (like slashdot, kuroshin, etc), as far as
I know, you either get a single honking big back-end database server to
run PostgreSQL or MySQL, or pony up the big bucks for Oracle RAC.

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