- Industry: Computer
- Number of terms: 4807
- Number of blossaries: 1
- Company Profile:
Sun Microsystems is a multinational vendor of computers, computer software and hardware, and information technology services.
Write policy for maintaining coherency between cache and main memory. Write-back (also called copy back or store in) writes only to the block in local cache. Writes occur at the speed of cache memory. The modified cache block is written to main memory only when the corresponding memory address is referenced by another processor. The processor can write within a cache block multiple times and writes it to main memory only when referenced. Because every write does not go to memory, write-back reduces demands on bus bandwidth. See also cache, coherence, write-through.
Industry:Computer
An act whereby one entity assumes the identity and privileges of another entity without restrictions and without any indication visible to the recipients of the impersonator's calls that delegation has taken place. Impersonation is a case of simple delegation.
Industry:Computer
World Wide Web Consortium. The international body that governs Internet standards. Its Web site is http://www.w3.org/.
Industry:Computer
An acronym for application-specific integrated circuit. Any of the functionally complex chips in the OPL hardware design.
Industry:Computer
Wiring UI components to back-end data sources such as backing bean properties.
Industry:Computer
An abstract logical grouping of users that is defined by the application assembler. When an application is deployed, the roles are mapped to security identities, such as principals or groups, in the operational environment.
In the J2EE server authentication service, a role is an abstract name for permission to access a particular set of resources. A role can be compared to a key that can open a lock. Many people might have a copy of the key; the lock doesn't care who you are, only that you have the right key.
Industry:Computer
When a floating-point operation underflows, return a subnormal number instead of 0. This method of handling underflow minimizes the loss of accuracy in floating-point calculations on small numbers.
Industry:Computer
An abnormal event related to the AC power supply, such as a power outage. Inconventional usage, it can refer to DC power supply systems as well.
Industry:Computer
