virtual data
21Virtual memory/rewrite — Virtual memory is a computer system technique that gives an application program the impression it has contiguous working memory, while in fact it is physically fragmented and may even overflow on to disk storage. Systems which use this technique… …
22Virtual Private LAN Service — (VPLS) is a way to provide Ethernet based multipoint to multipoint communication over IP/MPLS networks. It allows geographically dispersed sites to share an Ethernet broadcast domain by connecting sites through pseudo wires. The technologies that …
23Data structure alignment — is the way data is arranged and accessed in computer memory. It consists of two separate but related issues: data alignment and data structure padding. When a modern computer reads from or writes to a memory address, it will do this in word sized …
24Virtual concatenation — (VCAT) is an inverse multiplexing technique used to split SONET/SDH bandwidth into logical groups, which may be transported or routed independently. Alternate SONET/SDH concatenation techniques are contiguous concatenation and arbitrary… …
25Data General — Industry Computer Fate Acquired Successor EMC Corporation Founded 1968 …
26Data virtualization — describes the process of abstracting disparate data sources (databases, applications, file repositories, websites, data services vendors, etc.) through a single data access layer (which may be any of several data access mechanisms). This… …
27Virtual storage access method — (VSAM) is an IBM disk file storage access method, first used in the OS/VS2 operating system, later used throughout the Multiple Virtual Storage (MVS) architecture and now in z/OS. Originally a record oriented filesystem, VSAM comprises four data… …
28Data center infrastructure management — (DCIM) is the integration of information technology (IT) and facility management disciplines to centralize monitoring, management and intelligent capacity planning of a data center s critical systems. Achieved through the implementation of… …
29Virtual Router Redundancy Protocol — (VRRP) is a non proprietary redundancy protocol described in RFC 3768 designed to increase the availability of the default gateway servicing hosts on the same subnet. This increased reliability is achieved by advertising a virtual router (an… …
30Data center bridging — (DCB) refers to a set of enhancements to Ethernet local area networks for use in data center environments. Specifically, DCB goals are, for selected traffic, to eliminate loss due to queue overflow and to be able to allocate bandwidth on links.… …
