MS-to-MS FTP Integration: Design Patterns for Multi-System Batch Data Exchange

Abstract

Multi-system, or MS-to-MS, FTP integration describes the broader design problem that arises once an organization moves beyond a single pair of systems exchanging batch files and must instead coordinate file-based data exchange across three, five, or dozens of systems simultaneously. What works cleanly for two systems, a simple point-to-point file drop, becomes progressively harder to govern, secure, and troubleshoot as system count grows, and the design pattern chosen early in an integration program's life has lasting consequences for its long-term maintainability. This article presents a structured set of design patterns for MS-to-MS FTP integration, covering point-to-point exchange, hub-and-spoke brokering, and publish-subscribe file distribution, along with a decision framework for selecting among them. It addresses the full supporting discipline required to operate any of these patterns reliably at scale: file lifecycle management, scheduling models, naming conventions, error handling, security architecture, monitoring, governance, and performance. The article is illustrated throughout with simple structural diagrams and a dense set of reference tables covering the full integration lifecycle

The framework's central argument is that pattern selection should follow directly from system count and topology, illustrated concretely in Section 18, where a five-system point-to-point mesh requires ten separate connections while the equivalent hub-and-spoke topology requires only five, a difference that compounds quickly as additional systems join the integration landscape