Views Total views. Actions Shares. No notes for slide. Traditional Servers: Pros and Cons 1. All rights reserved. Enterprise Equipment. Specialized Processors. Traditional Servers: Pros and Cons 1 Introduction This document is intended to help organizations decide whether an appliance or a traditional server is an appropriate platform for hosting enterprise software applications.
In this section, terms and concepts relevant to appliances are introduced, so that the subsequent discussion can be more clear. Run on one or more centralized servers. Provide a service to many users, possibly distributed across multiple sites. Must be scalable and reliable, because many users would be adversely impacted by loss of access to the application.
An operating system, such as Windows or Linux. Traditional Servers: Pros and Cons 3. Possibly a web server, such as IIS or Apache. Normally, an organization will have many such servers, and deploy one or more applications on each one.
The above description is only approximate. For example, hardware may be virtualized, other operating systems are available and other components may be required. Specialized Processors Server appliances intended for enterprise deployment have two basic types: 1.
Commodity server hardware, with pre-installed software. Specialized processing hardware. Traditional Servers: Pros and Cons Specialized processing hardware is used mainly where the performance characteristics of the system can- not be easily reached with a conventional server.
Easy installation: The operating system and application software are pre-installed on the hardware, which reduces installation time and effort. Note that this is not generally true for commodity hardware bundled as an appliance — this advantage is only relevant where the appliance incorporates specialized hardware, most often to provide a specialized network infrastructure function.
These include: 1. Low performance commodity hardware: In order to reduce manufacturing costs, hardware appliances often incorporate previous-generation components. Poor hardware support: Appliance servers are not developed, sold or supported by software vendors.
Since neither the software vendor nor the appliance hardware vendor with few exceptions, such as Dell is likely to have local support staff in many cities, technical support normally leads to customers mailing their appliance to a depot for repair or replacement. This leads to longer lead times to deliver hardware to some locations in the world, higher cost and the need for more locally deployed infrastructure, usually in precisely those locations that would not otherwise merit extra capacity.
Expensive disaster recovery: Because hardware repair cannot be provided promptly by either appliance software vendors or ap- pliance hardware manufacturers, most vendors that sell appliance solutions encourage customers to buy redundant appliances. This means that where a customer might normally deploy a single con- ventional server, they must purchase and deploy two appliance servers for the same task, to get a comparable assurance of availability.
Inability to virtualize: Appliances are just that — pre-packaged hardware. This means that they cannot be virtualized. Given recent reports, I suspect b would be the prudent choice.
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