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Many hosting companies will take care of file system and database backups for you.  We have a few clients where we have file system backups configured, but database backups have to be handled manually, since the database is "live data".  Often we can just configure a cronjob that runs mysqldump so that a database snapshot is stored to a file and thus regularly backed up when the file system backup is run.  However, sometimes you have a perfect storm where mysqldump is too heavy for the server (causing severe slowdowns or even crashing some services), even if run in the least intensive way (such as with the --quick flag) and at a low traffic time: partially due to lack of system resources and a large database.

Here is a quick how-to for a strategy to prevent duplicate content across domains and subdomains of the same site by "whitelisting" discrete domains and redirecting all other requests to the main domain.

Google Page Speed Service is an interesting new offering for websites. It is currently free, but with limited availability for the time being. It claims up to 20 - 60% speed-up in overall page load. It accomplishes this by routing all site traffic through Google, which will automatically perform some optimizations such as minifying CSS and JavaScript and serving some page assets through its own content delivery network (CDN). This is quite interesting, and there is even a site that runs a test to show you how your site performance will change if you use the service. We ran this test on a few client sites, and certainly there was up to a 25% performance improvement on some; however, for others the Google-optimized version was slower!

Do you frequently use the Google, Wikipedia, and other search boxes in Firefox, typically in the top right of the window? Ever wanted to add your own for a site that isn't on the directory? Here's a quick and dirty guide to creating your own Firefox search engine plugin, using the api.jquery.com search as an example.