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Fault Tolerance
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ALSO CALLED: Fault-tolerance, Fault Tolerant, and FT
DEFINITION: Fault-tolerant describes a computer system or component designed so that, in the event that a component fails, a backup component or procedure can immediately take its place with no loss of service. Fault tolerance can be provided with software, or embedded in hardware, or provided by some combination.
Definition continues below.
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Integrated Infrastructure and Performance Management for Virtualized Environments
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WHITE PAPER:
Enterprises, government agencies and service providers are increasingly employing virtualized environments to decrease costs, consolidate data center space and reduce environmental impacts. This paper describes a comprehensive set of CA tools for managing virtual environments.
Posted: 29 Apr 2009 | Published: 01 Apr 2009
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Network and Voice Management Software from CA
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CASE STUDY:
South Field Financial experiences IT faults that create issues throughout the system. It is critical to South Field's success that its data center management teams quickly identify and repair data faults. CA's Spectrum can immediately detect the change in configuration. Please view this video for more examples of how CA benefits South Field.
Posted: 29 Apr 2009 | Published: 27 Apr 2009
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Avoidable Mistakes that Compromise Cooling Performance in Data Centers and Network Rooms
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WHITE PAPER:
This paper examines various mistakes that compromise data center colling systems, explains their principles, quantifies their impacts, and describes simple remedies.
Posted: 29 Apr 2009 | Published: 01 Dec 2003
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Cooling Strategies for Ultra-High Density Racks and Blade Servers
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This white paper addresses common data center cooling challenges and describes five strategies for deploying ultra-high power racks, with practical solutions for both new and existing data centers.
Posted: 29 Apr 2009 | Published: 01 Apr 2005
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Modular Systems: The Evolution of Reliability
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Modularity is an established technique for organizing and simplifying a complex system. In data centers, modular design has already taken root in new fault-tolerant architectures for servers and storage systems. The mission of this paper is to illustrate how modularity delivers a profound reliability benefit: fault tolerance
Posted: 29 Apr 2009 | Published: 01 Jan 2005
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System Grounding and Ground-Fault Protection Methods for UPS-Supplied Power Systems
| sponsored by Square D Critical Power Competency Center
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This paper explores the nature of circulating currents in UPS-supplied power systems when solid system grounding is employed and the use of modified-differential ground fault protection to eliminate the effects of these circulating currents.
Posted: 12 Feb 2009 | Published: 12 Feb 2009
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FAULT TOLERANCE DEFINITION (continued):
In the software implementation, the operating system provides an interface that allows a programmer to "checkpoint" critical data at pre-determined points within a transaction. In the hardware implementation (for example, with Stratus and its VOS operating system), the programmer does not need to be aware of the fault-tolerant capablilities of the machine. At a hardware level, fault tolerance is achieved by duplexing each hardware component. Disks are mirrored. Multiple processors are "lock-stepped"
Fault Tolerance definition sponsored by SearchCIO-Midmarket.com, powered by WhatIs.com an online computer dictionary
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