master file
Definition
Noun: 1. A primary, authoritative computer file: In computing, a master file is a relatively permanent computer file that serves as the primary, authoritative source of information for a given task or system. It contains the core, up-to-date data that other files or processes reference.
Usage and Examples
- As the central data source: The master file is the central repository from which other files are updated or against which transactions are processed.
- The customer master file contains all the essential records for our clients.
- Before generating the report, the system checks the data against the master file.
- As a relatively permanent record: It is distinguished from temporary transaction files or working files.
- Transaction logs are processed nightly to update the master file.
- Always back up the master file before running major system updates.
Advanced Usage
- Master File vs. Transaction File: In data processing, a system often uses a master file (holding permanent data like customer names and account balances) and a transaction file (holding temporary data like daily sales). The transaction file is used to update the master file.
- The day's sales from the transaction file were applied to the inventory master file.
Variants and Related Words
- Master data: (noun) The core, non-transactional data entities (like customers, products, employees) stored in a master file. It is the authoritative data.
- Reference file: (noun) A similar concept, often used as a synonym for a file containing static, lookup data.
Synonyms
- Main file
- Primary file
- Authority file
Related Concepts (Not Phrasal Verbs or Idioms)
- File maintenance: The process of updating a master file by adding, changing, or deleting records.
- Source of truth: A broader term for any data repository that is deemed the authoritative source. A master file is often the for its specific data domain.
Noun
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(computer science) a computer file that is used as the authority in a given job and that is relatively permanent
