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High availability ( HA) is a characteristic of a system that aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period. [ 1] Modernization has resulted in an increased reliance on these systems. For example, hospitals and data centers require high availability of their systems to perform routine ...
IBM Enterprise Systems Architecture is an instruction set architecture introduced by IBM as ESA/370 in 1988. It is based on the IBM System/370-XA architecture.. It extended the dual-address-space mechanism introduced in later IBM System/370 models by adding a new mode in which general-purpose registers 1-15 are each associated with an access register referring to an address space, with ...
The 7090 is the fourth member of the IBM 700/7000 series scientific computers. The first 7090 installation was in December 1959. [ 1] In 1960, a typical system sold for $2.9 million (equivalent to $23 million in 2023) or could be rented for $63,500 a month (equivalent to $501,000 in 2023). The 7090 uses a 36-bit word length, with an address ...
z/Architecture, initially and briefly called ESA Modal Extensions ( ESAME ), is IBM 's 64-bit complex instruction set computer (CISC) instruction set architecture, implemented by its mainframe computers. IBM introduced its first z/Architecture-based system, the z900, in late 2000. [ 1] Later z/Architecture systems include the IBM z800, z990 ...
The IBM Basic assembly language and successors is a series of assembly languages and assemblers made for the IBM System/360 mainframe system and its successors through the IBM Z . The first of these, the Basic Assembly Language ( BAL ), is an extremely restricted assembly language, introduced in 1964 and used on 360 systems with only 8 KB of ...
The IBM System/390 is a discontinued mainframe product family implementing ESA/390, the fifth generation of the System/360 instruction set architecture. The first computers to use the ESA/390 were the Enterprise System/9000 (ES/9000) family, which were introduced in 1990. These were followed by the 9672, Multiprise, and Integrated Server ...
An IBM zSeries 800 (foreground, left) running Linux. Announced on October 3, 2000, and available on December 18, the eServer zSeries 900 (z900 for short) was the first to feature the 64-bit z/Architecture extension of the S/360 architecture, still retaining the support for the 31-bit and 24-bit addressing programs back to 1964.
The Zachman Framework of enterprise architecture. The Zachman Framework is an enterprise ontology and is a fundamental structure for enterprise architecture which provides a formal and structured way of viewing and defining an enterprise. The ontology is a two dimensional classification schema that reflects the intersection between two ...