No subject

Tue Apr 20 23:23:57 UTC 2010

Having multiple databases gives you the opportunity to setup different DB
admins and therefore sandbox each site from each others' tables. A malicious
script or accidental and dangerous query has less chance of damaging tables
of other sites' DBs it doesn't have access to. But at the same time, you
trade off the convenience of being able to do comprehensive backup and
restore of the one-and-only DB.

On Thu, Aug 19, 2010 at 11:53 AM, Brian Layman <Brian at>wrote:

> I agree with Jacob. With the old school b5media, we'd done it both ways.
> While running separate installations of WordPress, we'd peaked at around
> 317
> live blogs.  What that does is create a nightmare for file handling on your
> servers. Let's guess at WordPress having 800 files when looking at themes
> and plugins combined.  Running separate WP instances, that's roughly 800 *
> 300 = 240,000 different files the server has to deal with and hopefully
> cache rather than load off of the hard drives.  Compare that with a
> multi-site install - 800 files total.  Obviously from a file perspective, a
> singe directory is easier to deal with. We'd even experimented using
> soft-links to serve the same files and get around this before WPMU had
> matured.   Also of consideration is what will happen when you update to a
> newer version of wordpress.  NSF will take lots of resources when it tries
> to sync up all of the changes across all of the servers.
> The database faces similar issues. Creating a single database with 11 * 300
> = 3300 tables can cause its own set of headaches as a "show tables" in a
> random plugin causes your whole site to pause.  Mike & Scribu nailed it.
> HyperDB will become your close personal friend.
> Not using MS means you can have each blog admin/author be truly in charge
> of
> their site and opens up configurations options blocked by the nature of MS
> and eliminates some security concerns as well.  I imagine that came into
> play in your decision.
> Backups regimes are easy enough. You'll want to create a table of installs
> etc you can run off of. That way you'll know all the install directories
> and
> database names. And then you can just iterate them. I have my own scripts
> you could modify for this purpose if you like.
> lol you're making me all nostalgic now...
> ______________________________________________
> Brian Layman
> eHermits, Inc.
> / / /
> _______________________________________________
> wp-hackers mailing list
> wp-hackers at

More information about the wp-hackers mailing list