Jason has made the One Search WPMU plugin which searches across all blogs on your system. I haven’t tried it myself (yet), but if it delivers as promised, it could be quite the nice add-on.
Sitewide search plugin released for MU
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Andrea,
Thanks for pointing people to the plugin. It works for what I wrote it for, but there are definite areas of improvement. I’m open to any suggestions!
Does this plugin scan all entries on every request across all blogs? Reason I ask is about resource use on the server if it is constantly querying the DB for the results with a “massive search”
Trent
Trent: With MySQL 5.01+ it will use views. So no massive searching. I’m trying to figure how to do the same for non-view versions of MySQL. Ideas?
I tried to use this plugin and I didn’t get it to work, so I made my own plugin, WPMU Global Search. It’s simple and allows searching by title, content or author across all blogs of your wpmu installation. In future versions will allow you to search by tags, categories, etc.