The Rise of Virtual Appliances
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Virtual appliances deliver focused services in a lightweight package. With all of the talk around virtualization being large system optimization, why single-purpose machines getting so much attention?
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The next sound you hear will be the buzz surrounding Virtual Appliances (appliances). However, it isn’t just marketing buzz; this time it’s the real thing. Virtual Appliances are small, specially designed virtual machines that provide a single service or perform a single function. They usually have a significantly smaller operating system footprint than standard virtual machines, a single or very limited number of exposed TCP ports, and a single application. Some appliance examples are mail servers, CMS (Content Management System) servers, web database servers, groupware servers, intrusion detection systems, and dozens more. They provide these focused services in a lightweight and often free package.
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