A common data dictionary that pro vides the integration necessary to tie the system together.

The products that meet these needs on the 900 Series are:

System Dictionary/XL, whic h provides programmers and system administrators with a single source for documen ting all aspects of the system, from data de￿nitions to con￿guration information. This cen tral source of information aids in dev eloping and maintaining applications and e￿ectiv ely managing system resources. The System Dictionary/XL has programmatic in terfaces for easy in tegration with other softw are. You can customize System Dictionary/XL to meet y our needs.

Optimizing compilers, whic h use HP Precision Architecture (HP-PA) to allow all programming on the 900 Series computers to be done in high-lev el languages. The compilers are integrated with MPE/iX to pro vide convenient access to ALLBASE/SQL and other information managemen ts subsystems.

VPLUS/V, which is a forms design and screen-handling tool for programmers.

Toolset/XL, whic h includes facilities for full screen editing, sym bolic source-level debugging, and version managemen t of source code. It pro vides a high-productivit y, integrated environment for application dev elopment.

Transact/XL, whic h is a procedural, high-lev el programming language for transaction processing applications. It pro vides the functions of a high-lev el language, such as COBOL, combined with a comprehensiv e set of powerful verbs that can perform sev eral functions in a single call.

Self-adjusting System Tables

Most system tables in MPE/iX are self-adjusting. MPE/iX con tinuously monitors and adjusts tables to ￿t the w orkload. Usually, the system manager can do this without sh utting down the system.

On-line Diagnostics for Peripherals

Hewlett-Packard Customer Engineers (CEs) are equipped with on-line diagnostic tools for many HP peripheral devices. A CE can remotely run diagnostics without sh utting down the system.

Disc Failure Tolerance

MPE/iX allows an y system disc not critical to the functioning of the operating system to go o￿-line without a￿ecting the system. Users cannot access ￿les on o￿-line discs.

Automatic Power Fail Recovery

MPE/iX and the 900 Series hardw are provide automatic po wer fail recovery. When a power failure starts, the system initiates a po wer failure procedure to preserv e the operating environment before the complete loss of po wer. A battery pack ensures the validity of main memory for a minim um of 15 minutes. If power is restored within 15 min utes, the system automatically resumes processing from the poin t at which the power failure occurred, and jobs continue from the point of interrupt.

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