availability


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availability

[ə‚vāl·ə′bil·ə·dē]
(computer science)
Of data, data channels, and input-output devices in computers, the condition of being ready for use and not immediately committed to other tasks.
(navigation)
The probability that a navigational system will function and provide required levels of accuracy, integrity, and continuity.
(physics)
The difference between the enthalpy per unit mass of substance and the product of entropy per unit mass multiplied by the lowest temperature available to the substance for heat discard; used in determining the ratio of actual work performed during a process by a working substance to that which theoretically should have been performed.
(systems engineering)
The probability that a system is operating satisfactorily at any point in time, excluding times when the system is under repair.

availability

(system)
The degree to which a system suffers degradation or interruption in its service to the customer as a consequence of failures of one or more of its parts.

One of the components of RAS.

availability

The accessibility of a system resource in a timely manner; for example, the measurement of a system's uptime. Availability is one of the six fundamental components of information security (see Parkerian Hexad). See also uptime and high availability.
References in periodicals archive ?
Failure to Understand and Quantify Downtime Risk: You can't really begin to sketch an availability plan with any level of competence until you have a firm grasp of downtime's impact on the business.
In addition, SteelEye provides a full range of High Availability consulting and professional services to assist organizations with the assessment, design and implementation of solutions for ensuring High Availability within their environments.
SATA drives are designed primarily for low-cost-per-gigabyte bulk storage where transaction rates are low and data availability is not mission critical.
Almost every market segment is moving up the demand curve for higher availability with the path to the "high nines" demanding a higher willingness to pay for that quality of service.
High Availability for VoyenceControl NG is now available.
However, fewer returns of large blocks of space to the segment's unoccupied supply and the resulting 66,450 square feet of positive absorption so far this year caused its availability rate to fall nearly two percentage points from September 1998 to 12.
Sonim recently announced commercial availability of the first fully redundant implementation of Open Mobile Alliance (OMA) PoC (PTT over Cellular) 1.
The availability rate in Southern Westchester grew to 11.
A Premier IBM Business Partner, Summit turned to Marathon for top-of-the-line high availability solutions that would enable customers to cost-effectively keep applications up and running.
In response to the increase in Class A options, the county's availability rate rose 1.
Lakeview Technology, the information availability company, today launched new releases of MIMIX[R] data protection, recovery and cluster management solutions for AIX.
The Fairfield County office market is off to a fast start in 1999, finishing the first quarter with strong leasing activity, positive absorption and a declining availability rate, according to the Insignia/ESG First Quarter Commercial Market Report.