File Utility Program (FUP) Management Programming Manual

Introduction

File Utility Program (FUP) Management Programming Manual—523322-001

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FUP Subsystem Overview

The FUP subsystem consists of the FUP and ORSERV processes. The FUP process

creates and manages disk files, and the ORSERV process reloads key-sequenced

Enscribe files and SQL objects. You can access FUP and ORSERV interactively from a

terminal, or you can access them programmatically from a management application

written in COBOL85, C, TACL, or TAL.

When you enter a FUP command interactively, you create a FUP process by entering

the FUP command at the TACL prompt (which is actually an implicit form of the TACL

RUN command). You then enter FUP commands that are interpreted and executed by

the FUP process.

Although most of the FUP interactive commands are executed by the FUP process,

FUP creates the ORSERV process to handle these commands:

•

RELOAD

•

STATUS

•

SUSPEND

RELOAD

RELOAD performs an online reload of a key-sequenced file or SQL object. Key-

sequenced files that have had several insertions, deletions, or updates with key-length

changes can have the following abnormalities:

•

Empty blocks or blocks containing large amounts of empty space that cause an

inefficient use of disk space and slower sequential access time

Figure 1-1. A Management Application and a Subsystem Process

Note. For more information about the FUP commands, see the File Utility Program (FUP)

Reference Manual.

004CDT .CDD

Management

Application

Subsystem

Process

The subsystem executes the

command (if no errors occur) and

returns a reply to the management

application in an SPI response buffer.

A management application sends a

command to the subsystem in an SPI

command buffer.