Fact-checked by Grok 2 weeks ago

Transaction Processing Facility

The Transaction Processing Facility (TPF), officially known as IBM z/Transaction Processing Facility (z/TPF), is a specialized, high-availability operating system designed for processing of high volumes of transactions on computers, enabling rapid response times to messages from large networks of terminals. Originating in 1962 as a joint project between and to develop the Semi-Automatic Business Research Environment (), the world's first computerized airline reservation system, z/TPF evolved from the Airline Control Program (ACP) into a robust platform for mission-critical workloads. Initially tailored for the travel industry, including airlines, railways, and hotels, it expanded in the and beyond to support high-volume applications in , such as retail authorizations, ATM clearing, and deposit balancing, handling tens of thousands of from hundreds of thousands of users. Key attributes of z/TPF include sub-three-second response times, restart capabilities in 30 seconds to two minutes after failures, and support for up to 32 multiprocessor z/Architecture configurations, achieving over a million input/output operations per second and 99.999% availability. It operates on logical partitions (LPARs) within IBM System z environments, utilizing a single-image database for centralized, secure processing, and integrates with hybrid cloud technologies via protocols like REST, HTTP, MQ, MongoDB, and Kafka. The system comprises components such as z/TPF Enterprise Edition for core operations, z/TPFDF for database management, TPF Operations Server for monitoring, and TPF Toolkit for development, all contributing to its cost-efficiency with low per-transaction costs and scalable capacity growth. Modern enhancements, including pervasive encryption and open-ended expansion, ensure z/TPF remains vital for industries demanding uninterrupted, high-throughput transaction integrity.

Overview

Definition and Purpose

The Transaction Processing Facility (TPF) is a specialized developed by for mainframe computers, descended from the System/360 family and optimized for mission-critical applications requiring high-throughput , such as reservations and payment systems. It originated from joint efforts between and customers in the to support reservation systems. The primary purpose of TPF is to manage extreme volumes of transactions—up to tens of thousands per second—with response times under three seconds in environments demanding continuous 24/7 availability and minimal downtime. This design enables reliable handling of large-scale, write-intensive workloads across industries like and , where system and are paramount. At its core, TPF employs a transaction-oriented processing model in which each transaction is treated as an atomic unit, ensuring complete and without reliance on traditional multi-user file systems. This approach allows for efficient, direct database access and rapid recovery, typically within tens of seconds, by duplexing inherently within the . Over time, TPF has evolved into z/TPF to leverage 64-bit addressing on modern System z hardware.

Key Benefits

The Transaction Processing Facility (TPF) excels in delivering high throughput, routinely handling tens of thousands of in production environments, as evidenced by deployments in financial systems where rates exceed 25,000 . This capability stems from its optimized design for high-volume workloads, enabling efficient processing without bottlenecks even under intense demand. TPF ensures low with response times typically in the milliseconds, such as 5 milliseconds for applications achieving nearly 10,000 , maintaining sub-second performance during peak loads thanks to its kernel architecture. Reliability is a cornerstone, with system restarts after failure completing in 30 seconds to two minutes, contributing to an availability of 99.999% in mainframe environments. Cost efficiency is achieved through minimized cost per transaction via optimized resource utilization on mainframes, outperforming distributed models in for large-scale operations. Security features include pervasive for data in transit across networks, at rest on disk, and in memory, alongside centralized database processing to uphold . These benefits support TPF's with hybrid cloud setups and its adoption in industries like and .

History

Origins in Airline Systems

The origins of the Transaction Processing Facility (TPF) trace back to the mid-1960s, when IBM developed the Airline Control Program (ACP) specifically for the IBM System/360 mainframe to support American Airlines' Semi-Automated Business Research Environment (SABRE) reservation system. This initiative arose from a collaborative effort between IBM and American Airlines, building on earlier innovations like the SABRE system's real-time capabilities demonstrated in the early 1960s on IBM 7090 computers, but adapted for the more versatile System/360 architecture announced in 1964. ACP was crafted to manage the high demands of airline operations, including rapid seat inventory updates and booking confirmations across a growing network of terminals. In 1969, released ACP as a specialized, non-priced operating system tailored for high-volume reservations, separating it from the broader Programmed (PARS) to focus on core control functions. This release marked a pivotal in , as ACP was engineered for , interactive operations that eliminated the need for , enabling near-instantaneous responses to inquiries and bookings—handling up to thousands of transactions per hour with minimal latency. By prioritizing efficiency in memory usage and operations, ACP addressed the unpredictable yet voluminous nature of flows, such as flight checks and confirmations, setting it apart from general-purpose systems like OS/360. The evolution from ACP to a formal product occurred in 1979, when transitioned it into the Transaction Processing Facility (TPF), introducing it as a priced program product (5748-T11) and generalizing its applicability beyond the industry while retaining its core strengths in high-speed transaction handling. This shift reflected growing demand for similar real-time capabilities in other sectors, though TPF's foundational design remained rooted in needs. Its continued adoption in systems underscores the enduring impact of these early innovations.

Development and Evolution

The Transaction Processing Facility (TPF) was officially launched in 1979 by as a specialized for the System/370 mainframe, designed to handle high-volume with low and high reliability. This release marked TPF's from earlier proprietary airline systems to a commercial product, enabling broader adoption beyond its initial niche. In the , TPF was adapted to the ESA/390 architecture, which introduced enhanced multiprocessing capabilities and improved scalability for handling larger workloads across multiple processors. This adaptation allowed TPF to support 31-bit addressing in ESA/390 TPF mode, facilitating better resource utilization in enterprise environments. During this period, TPF expanded from its airline origins to sectors like , where it processed millions of daily transactions for banking applications. The release of z/TPF Version 1.1 in September 2005 represented a major evolution, introducing 64-bit addressing support on System z mainframes to overcome previous segment limitations and enable larger memory configurations. This version also incorporated development tools and (Executable and Linkable Format) shared objects, allowing for more modern programming practices and easier integration with open standards while maintaining with TPF applications. Additionally, z/TPF integrated database facilities such as z/TPFDF for advanced data management. TPF 4.1, released in 2014, further improved scalability on by enhancing support for multi-processor environments and optimizing throughput for high-availability systems. These updates focused on refining and to meet growing demands in real-time processing. In 2025, z/TPF received product update 1.1.0.2025, delivering maintenance enhancements primarily aimed at improving system stability, compatibility with newer hardware, and overall operational reliability through targeted fixes and optimizations. These updates ensure continued support for mission-critical workloads without disrupting existing deployments.

Applications and Users

Primary Industries

The Transaction Processing Facility (TPF), now known as IBM z/TPF, is predominantly deployed in industries that demand ultra-high-volume, real-time transaction processing with sub-second response times and exceptional reliability. These sectors include aviation, finance, transportation, and retail, where TPF handles mission-critical workloads involving millions of transactions daily. In the aviation industry, TPF serves as the backbone for airline reservation and ticketing systems, enabling real-time booking, seat inventory management, and schedule updates across global networks. Its origins trace back to collaborative developments with airlines in the 1960s, and it continues to power core operations for handling peak loads during high-demand periods like holidays. The sector, particularly banking and , relies on TPF for authorizations and settlements, where it processes authorizations in 1-10 milliseconds to support detection and secure transfers. This capability ensures continuous availability for global financial networks handling billions in daily volume. Transportation applications extend TPF's use to rail and logistics operations, including reservation systems for passenger services and inventory tracking for freight scheduling. For instance, rail reservation platforms built on TPF manage availability and scalability for dynamic routing and booking in high-traffic environments. In retail, TPF supports high-speed point-of-sale (POS) systems and inventory management for large-scale operations, particularly through backend credit card processing that integrates with e-commerce and in-store transactions. Its efficiency in write-intensive workloads helps maintain real-time stock visibility and secure payment flows across distributed retail networks.

Notable Deployments

The Semi-Automated Business Research Environment (), developed by in collaboration with starting in the , represents one of the earliest and most enduring deployments of TPF technology, evolving from the original Airline Control Program (ACP) to the modern z/TPF for handling global flight reservations and real-time booking operations. processes millions of transactions daily, enabling seamless inventory management and passenger services across a vast network of airline partners. Visa Inc. relies on z/TPF as of 2025 for its high-volume authorization systems, processing millions of transactions each day to ensure rapid and reliable payment approvals in environments. In 2009, partnered with to deploy an upgraded z/TPF-based , enhancing scalability for global transaction volumes that can peak at tens of thousands per second. American Express utilizes TPF on IBM mainframes for its core authorization and settlement operations, supporting payment processing for millions of cardholders worldwide. This deployment, integral to the company's Credit Authorizer's Assistant system since the 1980s, handles high-throughput inquiries and updates with minimal latency. Delta Air Lines integrates TPF into its reservation and passenger service systems, such as Deltamatic, for real-time booking and operational management, a practice dating back to the system's early adoption in the 1960s alongside other major carriers. TPF enables Delta to manage complex flight inventories and customer interactions efficiently, contributing to its hybrid cloud migrations while maintaining legacy high-performance cores. Japan Airlines upgraded its worldwide reservation and ticketing systems in 2008 by selecting IBM's System z mainframes running z/TPF software, facilitating secure, high-speed processing for international bookings and e-ticketing. This deployment supports JAL's efforts, including integration with global distribution systems for availability and fare management.

Operating Environment

Tightly Coupled Configurations

Tightly coupled configurations in the Transaction Processing Facility (TPF), now known as z/TPF, enable () where multiple processors share the same main memory and I/O resources within a single mainframe system. This setup synchronizes access to shared main storage across multiple instruction-stream engines (I-stream engines or CPUs) in a environment, allowing concurrent execution of transactions without the need for inter-system communication. z/TPF operates on series hardware, supporting configurations with up to 99 I-stream engines per system, ranging from uniprocessor to multiprocessor setups. This scale-up approach leverages 64-bit addressing to optimize resource utilization in a unified processing complex. The primary advantages of tightly coupled configurations include simplified resource management through centralized synchronization, which reduces overhead and ensures consistent low-latency responses of 1-10 milliseconds even at 98% utilization, as reported in early documentation. Additionally, caching minimizes disk access, enabling linear to over 1 million for write-intensive workloads, providing higher throughput compared to distributed systems. In contrast to loosely coupled setups for distributed processing, tightly coupled environments excel in scenarios demanding immediate processor coordination. These configurations are particularly suited for single-site transaction hubs, such as and authorization networks, where high update rates and sub-second response times are critical for handling continuous, high-volume simple transactions.

Loosely Coupled Configurations

In loosely coupled configurations, the /Transaction Processing Facility (z/TPF) enables up to 32 mainframe to function as a coordinated , where each central processing (CPC) maintains its own dedicated while accessing a shared database. This setup is facilitated by the High Performance Option (HPO) feature, which supports data and transaction sharing across multiple systems without requiring tight integration of hardware resources. Such configurations are particularly suited for environments demanding high throughput and , as they allow operation of each while synchronizing critical like and message queuing. The primary coupling mechanism in these configurations is the Multi-Processor Interconnect Facility (MPIF), which utilizes channel-to-channel (CTC) adapters to enable efficient inter-system communication. MPIF handles tasks such as processor status monitoring, , and coordinated restarts, ensuring that messages and transactions can flow seamlessly between systems even if they are not physically co-located. For instance, during initial program load (IPL), processors in the exchange information via MPIF to join an active , preventing conflicts in shared resources. This communication layer supports both intra-complex interactions and connections between separate z/TPF s, enhancing overall system interoperability. Loosely coupled setups provide horizontal scalability, allowing organizations to expand capacity by adding processors for load distribution, geographic redundancy, or . They are commonly implemented in global environments, such as those in the airline and financial sectors, where across multiple sites ensures continuous availability during outages. In active-active configurations, multiple z/TPF systems process workloads collaboratively against the same database, using locking mechanisms for shared record access. Unlike tightly coupled configurations optimized for single-site shared processing, loosely coupled clusters excel in distributed, high-availability scenarios by supporting and workload balancing over wider areas.

System Architecture

Data Records and Management

The Transaction Processing Facility (TPF) employs a specialized model optimized for high-speed , utilizing fixed-length records of 381 bytes, 1055 bytes, or 4KB stored directly on direct-access storage devices (DASD). These records enable rapid, direct access to data without the overhead of variable-length structures, supporting efficient I/O operations in environments. Each record type can accommodate multiple ordinals, allowing for organized via simple identifiers, which minimizes in processing millions of . Central to TPF's is the TPF Database Facility (TPFDF), a non-relational that handles core functions such as data allocation, indexing, and locking. TPFDF organizes data hierarchically—using fixed records for stable indexes and pool records for dynamic, variable-length content—while abstracting physical details from applications. It supports atomic updates to individual records, ensuring transaction integrity without a multi-user ; instead, the entire space serves as a flat for record types like 4KB fixed, 1055-byte, and 381-byte formats. Unlike relational databases, TPFDF lacks features such as joins or SQL queries, prioritizing low-latency access over complex querying. TPF distinguishes between processor-shared records and processor-unique records to balance global consistency and local performance. Processor-shared records are accessible across all processors in tightly or loosely coupled configurations, facilitating for system-wide operations like checkpointing and recoup processes. In contrast, processor-unique records are confined to a single processor, enhancing speed for workloads that do not require inter-processor sharing, such as local caches or temporary data. This dual approach allows up to 32 multiprocessor configurations to share the database while distributing records horizontally across storage devices to reduce contention.

Programs and Residency

Programs in the Transaction Processing Facility (TPF) are primarily written in Basic Assembler Language (BAL), with later implementations like z/TPF adding support for C and C++ to facilitate development of more complex applications. In legacy TPF versions, these programs were compiled into fixed-size load modules limited to a maximum of approximately 4KB, with individual segments often 381 bytes for small modules or 1055 bytes for large ones. In z/TPF, programs can exceed this limit. Entry Control Blocks (ECBs) are 12 KB in size. This enables efficient management within TPF's memory-limited architecture. TPF distinguishes between transient and resident program residency modes to balance memory efficiency and performance. Transient programs, stored in file storage, are dynamically loaded into working storage only for the duration of a specific , conserving main storage for essential system functions and infrequently used . programs, conversely, occupy fixed main storage permanently, allowing immediate invocation for high-volume, frequently accessed routines such as those handling core logic in . In z/TPF, this evolves with Program Areas (CRPAs) for 31-bit and 64-bit programs, supporting preload, demand, or default loading options to further optimize residency based on usage patterns. Program loading in TPF occurs through dynamic linking at designated entry points within the modules, initiated by the loader during initial program load (IPL) or retrieval. Absent a traditional , programs reside in specialized direct-access areas—fixed for resident modules and for transient ones—eliminating overhead from and enabling rapid access via control program directives. Macros facilitate inter-module communication and transfers, ensuring seamless invocation without full program relocation. TPF's execution environment employs , interrupt-driven scheduling via Entry Control Blocks (ECBs) to prioritize and manage transactions, supporting concurrency for thousands of programs (up to 5000 ECBs in z/TPF configurations). This priority-based dispatching—across levels for I/O, ready, input, and deferred tasks—ensures low-latency processing, with first-in-first-out handling within each level. During execution, programs interact with data records to complete transactions, while memory optimization techniques like reentrant code design and controlled storage allocation via system macros maintain high throughput in constrained main storage.

Features and Attributes

Core Characteristics

The Transaction Processing Facility (TPF) is a lightweight, transaction-focused operating system designed specifically for high-volume (OLTP), emphasizing atomic operations and minimal overhead to ensure efficient handling of continuous, workloads. At its core, TPF operates as a that delivers deterministic response times, typically in the range of 1-10 milliseconds, even under peak loads of tens of thousands of from hundreds of thousands of concurrent users. This design avoids mechanisms, prioritizing dedicated, predictable processing over multi-user multitasking found in general-purpose systems. TPF's specialization for OLTP manifests in its optimization for write-intensive, high-update-rate environments, with no inherent support for batch jobs or , relying instead on direct physical access to maintain low and high integrity for interrelated updates. In classic TPF implementations, addressing is fixed at 31-bit, limiting the system to 2 of addressable space, which promotes efficient high-density packing of and programs. The z/TPF variant expands this capability to 64-bit addressing, supporting up to 16 exabytes while preserving the essential for scalable OLTP . User interaction with TPF occurs through a text-based, accessed via 3270 terminals, eschewing graphical user interfaces in favor of streamlined, scroll-upward text displays for operational control and monitoring. Development and maintenance are facilitated by the TPF Toolkit, an Eclipse-based environment running on Windows that provides tools for program editing, debugging, and deployment without altering the system's core runtime simplicity.

Performance and Scalability

The Transaction Processing Facility (TPF) is engineered to deliver high throughput, supporting hundreds of messages per second in baseline configurations and scaling to over 25,000 in production environments across networks ranging from 100 to 10,000 terminals. This capability enables TPF to manage unpredictable peaks in transaction volumes, such as those in airline reservations or , while maintaining and . TPF's scalability is achieved through support for up to 32-processor configurations in tightly coupled environments, allowing for efficient load balancing with minimal overhead. Growth is open-ended via hardware upgrades on mainframes, including expanded memory and storage, which facilitate handling increased transaction demands without architectural redesign. Program residency in memory further contributes to this by reducing I/O dependencies during peak loads. Performance optimizations in TPF include hardware-accelerated for , at rest, and in use, which minimizes processing overhead for secure transactions. Low-latency I/O is provided through the z/TPFDF database manager, achieving average response times of 2 milliseconds at high throughput levels, with overall user response times under 3 seconds. These features enable efficient CPU utilization in high-volume operations, as demonstrated by 73% utilization at peak loads of 163,000 I/O operations per second in a 2007 study on z9 .

Modern Developments

z/TPF Enhancements

z/TPF represents a significant modernization of the classic (TPF), incorporating enhancements that leverage contemporary hardware capabilities while maintaining its core strengths in high-volume . One of the foundational enhancements introduced with z/TPF in was support for 64-bit addressing under , which superseded the previous 31-bit addressing mode. This upgrade enables access to vastly larger memory spaces, up to 16 exabytes theoretically, allowing systems to utilize over 2 GB of real memory for tables, programs, and Virtual File Access (VFA) structures. Consequently, it supports expansive datasets, such as up to approximately 481 TB across 19,999 DASD volumes under earlier limits, with support extended in 2022 via APAR PJ46681 to 1,182,006 cylinders per volume for much larger capacities, reducing reliance on disk I/O and enhancing overall throughput and scalability. z/TPF also adopted the Executable and Linking Format () as its standard binary format, packaging all executable programs—whether in C/C++ or TPF Assembler—as ELF shared objects (SOs). This replaces the legacy segmented program model, facilitating dynamic linking through a new E-type loader that handles program retrieval, relocations, and external reference resolution at runtime. By enabling shared code across multiple programs, ELF support reduces main storage residency requirements and improves loading efficiency, particularly for applications above the 2 GB boundary. To streamline development, z/TPF integrated open-source GNU tools, including the GNU Compiler Collection (GCC) for compiling C/C++ code and the GNU Debugger (GDB) for source-level debugging. These tools, targeted for the s390x-ibm-tpf architecture, allow developers to build and test applications using familiar, industry-standard environments while ensuring compatibility with z/TPF's runtime. This integration lowers barriers to entry for modern programming practices and accelerates the migration of legacy TPF applications. The TPF Operations Server was introduced as a PC-based console tool that operates outside the z/TPF complex, enabling and of multiple systems from a single . It supports LAN-based connectivity for redundant configurations, automates routine operational tasks, and aids in rapid problem diagnosis, thereby enhancing overall system manageability without impacting transaction performance. In the 2025 product update, z/TPF received maintenance-focused enhancements to bolster stability and compatibility with the latest processors, including optimizations for TLS session initiation via shared SSL to improve throughput and resiliency. Additional tweaks, such as reduced operations for frequently entered programs and shortened path lengths for accessing format-1 global fields in C/C++ applications, provide minor performance gains while ensuring seamless operation on current hardware. These updates are delivered through cumulative APAR maintenance, allowing users to the latest patches for enhanced reliability.

Integration with Cloud and Hybrid Environments

The IBM z/Transaction Processing Facility (z/TPF) supports hybrid cloud environments through industry-standard interfaces that enable seamless connectivity between its high-volume core and distributed cloud services. Specifically, z/TPF provides APIs for and HTTP to expose core services and data, allowing integration with cloud-based applications without disrupting on-premises operations. Additionally, it incorporates support for for reliable messaging, Kafka for event-driven architectures, and for real-time data access, facilitating bidirectional data exchange in hybrid setups. Migration paths for z/TPF workloads to hybrid environments emphasize progressive modernization, enabling organizations to transition applications to the without a complete rewrite. Tools such as the IBM TPF Toolkit allow developers to create services that encapsulate z/TPF functions, while asynchronous processing isolates slow remote interactions to protect overall system performance. The z/TPF Enterprise Edition further enhances this by incorporating features for , including compatibility with Red Hat on for to deploy Kafka clusters, and Java-based orchestration layers for integration. These capabilities support breaking monolithic z/TPF applications into modular services that can run alongside cloud-native components. This integration delivers key benefits for industries like and , where z/TPF remains a cornerstone for mission-critical processing, by enabling 24/7 global operations with the mainframe handling low-latency transactions and resources managing and elastic scaling. For instance, z/TPF can process up to 16 billion transactions per day while feeding to -based tools for insights. Challenges such as ensuring seamless data flow between on-premises z/TPF and off-premises resources are addressed through the MongoDB Interface for near-real-time replication and z/TPF Business Events with Kafka, which minimize latency and overhead in data pipelines.

References

  1. [1]
    IBM z/Transaction Processing Facility
    The IBM z/Transaction Processing Facility (z/TPF) system is a high availability operating system designed to provide quick response times to high volumes of ...Overview · Benefits
  2. [2]
    Introduction to the z/TPF system - IBM
    The z/TPF system is a high availability operating system designed to provide quick response times to high volumes of messages from large networks of terminals ...
  3. [3]
    [PDF] Transaction Processing: Past, Present, and Future - IBM Redbooks
    Sep 29, 2012 · The origin of z/TPF is the first mainframe transaction application developed in 1962 as a joint project between IBM and. American Airlines ...
  4. [4]
    [PDF] IBM z/Transaction Processing Facility: Overview and Enterprise ...
    Jan 26, 2010 · z/TPF can support additional updates per second to shared data than most general purpose operating systems, which is a significant reason why z/ ...
  5. [5]
    [PDF] Availability and performance aspects for mainframe consolidated ...
    Sep 24, 2007 · z/TPF or “z/Transaction Processing Facility” is a special-purpose system ... no file system functionality (for ordinary use) and no ...
  6. [6]
    [PDF] z/TPF I/O Performance Study Results - IBM
    z/TPF's largest customers are able to achieve throughput exceeding 1.4M I/O operations per second (IO/s) and transaction rates well over 25K tps in production.<|separator|>
  7. [7]
    Mainframe operating system: z/TPF - IBM
    The z/Transaction Processing Facility (z/TPF) operating system is a special-purpose system that is used by companies with very high transaction volume.
  8. [8]
    [PDF] z/TPF Modernization - IBM
    May 4, 2024 · z/TPF Task Management for Non-Transactional Work z/TPF | 2024 TPF ... Includes unique transaction identifier, NVP data, and resources consumed ...
  9. [9]
    [PDF] Getting Started with IBM Z Resiliency
    The performance improvement depends on your workload. zHyperLink Express. zHyperLink Express provides a low-latency connection from IBM Z to storage subsystems ...<|separator|>
  10. [10]
    [PDF] Optimize high-volume transaction processing on the mainframe. - IBM
    The IBM System z™ Transaction Processing Facility (z/TPF) system is an operating system and transaction processor that works with application programs to ...
  11. [11]
    [PDF] Accelerate z/TPF Application Modernization with Hybrid Cloud
    Sep 15, 2023 · This IBM Redbooks® publication provides an overview of the. IBM® strategy to help you modernize z/TPF applications faster.
  12. [12]
    Sabre - IBM
    A conversation that began with discovering their common surname would lead to the invention of Sabre, the world's first centralized airline reservation system.
  13. [13]
    [PDF] The Origins and Development of Airline Control Program/TPF - AMiner
    To really understand the origins and development of the system we now call TPF we must take a trip back in time to circa 1940. We will visit a main ticket ...Missing: Facility | Show results with:Facility
  14. [14]
    [PDF] Airline Control Program/ Transaction Processing Facility (ACP /TPF ...
    Requests for copies of IBM publications should be made to your IBM representative or to the IBM branch office serving your locality. A form for readers' ...
  15. [15]
    [PDF] Introducing z/TPF! - IBM
    Oct 4, 2004 · Allows you to view recent history of the socket for faster online debugging. Can be used in conjunction with individual IP trace. There are ...
  16. [16]
    [PDF] IBM zSeries 900 Technical Guide
    ESA/390 TPF mode. In ESA/390 TPF mode, storage addressing follows the ESA/390 architecture mode, to run the. TPF/ESA operating system in the 31-bit addressing ...
  17. [17]
    [PDF] z/TPF–The evolution of transaction processing to open standards - IBM
    New businesses moving into transaction processing also benefit from z/TPF because of its fundamentally superior architecture (which drives high transac- tion ...
  18. [18]
    [PDF] TPF and Financial Services - IBM
    TPF has a twenty-five year history of meeting banking industry needs for high volume transaction processing. From the first TPF banking system in 1977, TPF has ...
  19. [19]
    z/Transaction Processing Facility (TPF)_1.1.x - IBM Support
    Jun 4, 2024 · z/Transaction Processing Facility (TPF) 1.1.x is generally available as of 2005-09-16 which means this offering can be purchased and is ...Missing: V1. | Show results with:V1.
  20. [20]
    [PDF] z/Transaction Processing Facility Enterprise Edition 1.1.0 (z/TPF) - IBM
    – Benefit – Programmer has more flexibility in register usage, programs are easier to write and more efficient which reduces development cost. Page 22. IBM ...
  21. [21]
    [PDF] z/TPF Build Education - IBM
    These makefiles will work with both the TPF 4.1 and z/TPF versions of MakeTPF. The interface is the same. The rules that are run are different. The ...
  22. [22]
    What's new in z/TPF product update 2025 - IBM
    Various updates and enhancements are provided for the z/TPF system in 2025. You can download the most recent enhancements and maintenance for the z/TPF system.Missing: 1.1.0.2025 | Show results with:1.1.0.2025
  23. [23]
    Product update 2025 - IBM
    Learn about the enhancements that are available for the z/TPF system and z/TPFDF product in 2025. For detailed migration considerations for each APAR, ...Missing: 1.1.0.2025 | Show results with:1.1.0.2025
  24. [24]
    IBM Helps Air and Rail Transportation Companies Meet Consumer ...
    May 3, 2010 · Passenger Rail Reservation Service is built on top of z/TPF to provide availability, scalability, performance, and SOA-enabling capabilities ...
  25. [25]
    How American Airlines lost its computer | I, Cringely
    Apr 29, 2013 · SABRE runs on IBM's TPF(transaction processing facility) environment. AA's flight operations system (FOS) is seperated from the reservation ...
  26. [26]
    SabreTalk - Wikipedia
    SabreTalk was developed jointly by American Airlines, Eastern Air Lines and IBM. SabreTalk is known as PL/TPF (Programming Language for TPF). In 1973, Eastern ...
  27. [27]
    Visa Opens New Data Center in the U.S.
    Nov 16, 2009 · New operating system – Developed in partnership with IBM, the system, known as z™ Transaction Processing Facility (z/TPF), is a 64-bit operating ...Missing: notable SABRE Express Delta Airlines UPS
  28. [28]
    Big Blue's software makes credit hum - Times Herald-Record
    Nov 27, 2009 · TPF powers credit card and airline transactions, at a rate of 20,000 per second. An upgrade commissioned by Visa – and developed by IBM – in ...
  29. [29]
    [PDF] A The Authorizer's Knowledge-Based Credit for American Assistant
    CAS runs on an IBM mainframe under TPF, a high speed/high volume transaction-based. IBM operating system also used for airline reservations. CAS automatically.
  30. [30]
    z/TPF Geographically Dispersed Processing for High - IBM Z Software
    Jun 4, 2018 · Multiple z/TPF Customers; Citibank, SABRE, Marriott, Amex, and TVPT, desire an implementation of z/TPF where at least two geographically ...
  31. [31]
    [PDF] Saurabh Aggarwal TPF Developer – Delta Air Lines Mar, ...
    This proof of concept is to demonstrate z/TPF's ability to directly read and write data into z/TPF File System which can be accessed directly via Open. Source ...
  32. [32]
    About TPFUG
    ... airline schedules. From that first meeting, a cooperative effort was formed with IBM to create the first operating system, called ACP (Airline Control Program).Missing: priced | Show results with:priced
  33. [33]
    Japan Airlines selects IBM's System mainframe and z/TPF software.
    1 software from computer company IBM Japan has been selected to upgrade the worldwide reservation and ticketing systems of Japan Airlines International Co Ltd.
  34. [34]
    [PDF] Japan Airlines' ticketing system—an Internet money-maker - IBM
    Japan Airlines combines IBM hardware, software, middleware, and systems' experience to build a powerful, secure Internet ticket reservation system. Application.
  35. [35]
    z/TPF system parallel processing - IBM
    Tightly coupled multiprocessing refers to the synchronization of accesses to shared main storage in a z/Architecture configuration of multiple I-stream engines.
  36. [36]
    CONFIG - IBM
    A system being defined as a loosely-coupled system will define more than one and up to 32 z/TPF processor IDs (see Example 2). Specifying more than one z/TPF ...
  37. [37]
    [PDF] z/Transaction Processing Facility Enterprise Edition Version 1 ... - IBM
    IBM® z/Transaction Processing Facility Enterprise. Edition (z/TPF) is an operating system that works with application programs to process transactions.<|control11|><|separator|>
  38. [38]
    Multi-processor interconnect facility - IBM
    MPIF uses channel-to-channel (CTC) support to communicate in a single z/TPF loosely coupled complex, or between multiple z/TPF complexes.Missing: inter- | Show results with:inter-
  39. [39]
    Loosely coupled IPL procedure - IBM
    If two or more z/TPF processors are IPLed at the same time, each one is unaware of the other until they go through MPIF restart. If the z/TPF systems that are ...
  40. [40]
    [PDF] Securing Your z/TPF Environment - IBM Redbooks
    Jul 29, 2024 · This includes capabilities such as high availability, workload prioritization and data isolation. We touch on aspects of resiliency throughout ...
  41. [41]
    Data organization and storage - IBM
    The organization of data is important to the z/TPF system. The performance objectives of the z/TPF system must be achieved while, regardless of the actual ...Missing: EMM | Show results with:EMM
  42. [42]
    Record allocation - IBM
    The z/TPF system views the entire file space as a repository for holding 4K, 1055-byte and 381-byte records. Within a given record type (for example, 4K fixed ...Missing: EMM structure
  43. [43]
    Database overview - IBM
    In the z/TPF system, a typical way to organize this data is through a hierarchical structure where the higher level is an index to the lower level that ...Missing: EMM | Show results with:EMM
  44. [44]
    Product overview for z/TPFDF - IBM
    The z/TPFDF product helps to simplify the job of the application programmer by allowing high speed access to persistent data on the z/TPF system while providing ...
  45. [45]
    z/TPF Database Facility Enterprise Edition product - IBM
    The z/TPF Database Facility Enterprise Edition is a database manager for applications that run in the z/TPF system. z/TPFDF is a product that enhances the ...
  46. [46]
    System-utilized record types - IBM
    System-utilized record types are fixed file data record types that system programs require, including main storage resident records.
  47. [47]
    https://www.ibm.com/docs/en/ztpf/1.1.2024?topic=support-system-utilized-record-types
  48. [48]
    [PDF] IBM z/Transaction Processing Facility Enterprise Edition V1.1
    Oct 7, 2004 · z/TPF can act as a specialized server for transaction application processing and can play a role in various enterprises as a core infrastructure ...
  49. [49]
    3270 interface - IBM
    A 3270 interface, defined by the Host Interface parameter, has a set of required parameters that you must provide so that the record is read correctly, ...
  50. [50]
    IBM Adds Open-Source Agility to Transaction-Processing OS
    Oct 25, 2004 · Written to handle airline bookings, it was originally named Airlines Control Package (ACP). IBM broadened its scope and renamed it TPF in 1979.
  51. [51]
    z/TPF Program Management - IBM - YUMPU
    Dec 22, 2012 · The loadtpf utility can load programs and<br /> ... the loader general file, initialize and format the online modules, and load IPLA and<br />.Missing: transient | Show results with:transient<|control11|><|separator|>
  52. [52]
    Overview - IBM
    Using local area network (LAN) technology, the TPF Operations Server provides a highly flexible and redundant configuration for TPF operations management.
  53. [53]
    Product update (PUT) 14 - IBM
    File system enhancements for PUT 14 provide various updates to standardize z/TPF file system support. With these enhancements, file system support on the z/TPF ...
  54. [54]
    TPF Product Family: Maintenance for TPF Operations Server - IBM
    The TPF Operations Server product releases maintenance online cumulatively; only the latest patch file needs to be applied to get the latest APAR updates.Missing: addressing ELF GNU
  55. [55]
    List of IBM Z/TPF OS Customers
    Which companies use IBM Z/TPF OS? Organizations such as Citigroup, KLM Royal Dutch Airlines, SWISS and Amtrak are recorded users of IBM Z/TPF OS for Operating ...