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For most websites, I recommend starting with a simple script that just rsync’s code to a version-specific directory on each target machine. If you are facile with unix symlinks, you can pretty easily set this up so that advancing to a new version (and, hence, rolling back) is as easy as swit...
Tracking shopping deals is the most immediate commercial application for alert services that go beyond 'topics.' Those examples are just a starter for ten, we can expect more sophisticated alert systems to evolve once Internet of Things ramps up in retail stores and elsewhere.
Wed, Jan 27 | from Read/WriteWeb