# Integrated Facility for Linux

> IBM mainframe processor for the Linux operating system

**Wikidata**: [Q1665432](https://www.wikidata.org/wiki/Q1665432)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Integrated_Facility_for_Linux)  
**Source**: https://4ort.xyz/entity/integrated-facility-for-linux

## Summary
The Integrated Facility for Linux (IFL) is a specialized IBM mainframe processor designed to run the Linux operating system efficiently. It enables enterprises to consolidate Linux workloads on IBM's high-performance mainframe systems. The IFL is part of IBM's Power Systems architecture and serves as a dedicated processing unit within larger mainframe environments.

## Key Facts
- Official name: Integrated Facility for Linux
- Aliases: IFL
- Instance of: Assist processor, CPU model
- Subclass of: IBM Power Systems, Central Processing Unit
- Designed for: Running Linux operating systems on IBM mainframes
- Manufacturer: IBM
- Wikidata ID: Q17016924
- Freebase ID: /m/04nk8k
- Wikipedia languages: German (de), English (en), Polish (pl)
- Sitelink count: 3

## FAQs
### Q: What is the Integrated Facility for Linux used for?
A: The Integrated Facility for Linux (IFL) is a specialty processor in IBM mainframes optimized for running Linux workloads. It allows organizations to execute open-source applications and services at scale while leveraging the reliability and performance of IBM Z hardware.

### Q: Is the IFL a full processor or an auxiliary one?
A: The IFL is classified as an assist processor, meaning it supports specific tasks rather than serving as the primary central processing unit. It works alongside general-purpose processors in IBM mainframes but is tailored specifically for Linux-based operations.

### Q: Which systems support the IFL?
A: The IFL is integrated into IBM's line of enterprise-class mainframes, particularly those under the IBM Z and IBM LinuxONE brands. These systems are designed for large-scale computing with high availability and security requirements.

## Why It Matters
The Integrated Facility for Linux plays a critical role in modernizing legacy IT infrastructures by enabling businesses to run contemporary Linux-based applications directly on powerful, secure, and scalable mainframe platforms. By dedicating processing power exclusively to Linux workloads, the IFL enhances efficiency and reduces costs compared to traditional server farms. Its presence has allowed IBM to remain competitive in hybrid cloud and open-source environments without sacrificing the robustness associated with mainframe computing. Enterprises benefit from improved resource utilization, lower energy consumption, and simplified management when consolidating diverse application stacks onto a single system using IFL processors.

## Notable For
- Being a purpose-built processor for Linux execution on IBM mainframes
- Supporting cost-effective scaling of open-source applications in enterprise settings
- Enabling workload consolidation that improves operational efficiency
- Offering enhanced performance per watt compared to distributed Linux servers
- Facilitating integration between legacy mainframe capabilities and modern development practices

## Body
### Overview
The Integrated Facility for Linux (IFL) represents IBM’s strategic move toward supporting open-source technologies within its flagship mainframe ecosystem. As part of IBM's broader initiative to accommodate heterogeneous workloads, the IFL provides a dedicated environment for executing Linux distributions such as Red Hat Enterprise Linux and SUSE Linux Enterprise Server.

### Technical Classification
Classified both as an “assist processor” and a “CPU model,” the IFL operates under the umbrella of IBM Power Systems architecture. While not functioning as a general-purpose processor, it complements other core CPUs in handling compute-intensive Linux processes with optimized throughput and reduced overhead.

### Integration & Compatibility
IFL processors are embedded components of IBM Z series and IBM LinuxONE servers. They allow customers to deploy thousands of virtual machines running Linux without impacting the performance of traditional mainframe applications handled by general-purpose engines like CPs (Central Processors).

### Market Impact
By introducing the IFL, IBM expanded its appeal beyond proprietary software ecosystems into markets dominated by open-source solutions. This shift enabled financial institutions, government agencies, and telecommunications firms to adopt Linux-native tools—such as Docker containers and Kubernetes orchestration—while retaining the unmatched uptime and scalability offered by mainframe infrastructure.

### Global Presence
Documentation and references to the IFL exist across multiple language versions of Wikipedia, including entries in German, English, and Polish. Despite limited public-facing content, its adoption among Fortune 500 companies underscores its importance in enterprise IT strategy.