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A software appliance is a software application combined with just enough operating system (JeOS) for it to run optimally on industry standard hardware (typically a server) or in a virtual machine. Software appliances simplify server applications by minimizing the tasks typically associated with installation, configuration and maintenance.
The customer receives all service and maintenance from the application vendor, eliminating the requirement to manage multiple maintenance streams, licenses, and service contracts. The software appliance is typically sold as a subscription service (pay-as-you-go) and is an alternative approach to Software as a Service.
The software provider must engineer this solution with a JeOS and other capabilities to eliminate any requirement for on-site support since this could call into question the viability of the business model.
The management of upgrades is particularly important; recent advances by open source operating systems have been targeted at addressing these concerns, including a forthcoming 'Appliance Operating System' from RedHat and NexentaCore Platform 1.0, an open source solution released in February of 2008
Virtual Appliances are virtual machines instances that are stored in the form of images and can be deployed across various servers in no time. Most popular platform for virtual appliances is VMware.
Advantages:
JeOS is the abbreviation (pronounced "juice") for the concept of Just Enough Operating System as it applies to a software appliance.JeOS is not a generic, one-size-fits-all operating system. Rather, it refers to a customized operating system that precisely fits the needs of a particular application. The application's OS requirements can be determined manually, or with an analytical tool, such as rPath's rBuilder.
Therefore, JeOS includes only the pieces of an operating system (often Linux) required to support a particular application and any other third-party components contained in the appliance. This makes the appliance more efficient, smaller, more secure and higher performing than an application running under a full general purpose OS.
The program will enable ISVs to create appliances combining their applications with Suse Linux Enterprise in an integrated package.
Novell also announced the beta release of Suse Linux Enterprise JeOS, a minimized version of the Suse Linux Enterprise platform that ISVs can use for creating appliances
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Novell also announced Wednesday that it will officially participate in the LimeJeOS project, which is an existing community-led project building a minimized version of the openSuse Linux distribution. Novell will release several new components of the Suse Appliance Program, including an automated tool to build appliances, it added.
Virtual appliance - Wikipedia, the free encyclopedia
Software appliance - Wikipedia, the free encyclopedia
Just enough operating system - Wikipedia, the free encyclopedia
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Created: December 20, 2006; Last modified: April 17, 2008