Introduction | Compaq Reliable Transaction Router instruction

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Introduction

This document introduces RTR and describes RTR concepts. It is intended for the system manager or administrator and for the application programmer who is developing an application that works with Reliable Transaction Router (RTR).

Reliable Transaction Router

Interoperability

Networking

Reliable Transaction Router (RTR) is failure-tolerant transactional messaging middleware used to implement large, distributed applications with client/server technologies. RTR helps ensure business continuity across multivendor systems and helps maximize uptime.

You use the architecture of RTR to ensure high availability and transaction completion. RTR supports applications that run on different hardware and different operating systems. RTR also works with several database products including Oracle, Microsoft Access, Microsoft SQL Server, Sybase, and Informix. For speciﬁcs on operating systems, operating system versions, and supported hardware, see the Reliable Transaction Router Software Product Description for each supported operating system.

RTR can be deployed in a local or wide area network and can use either TCP/IP or DECnet for its underlying network transport.

Introduction 1–1

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Compaq Reliable Transaction Router manual Introduction

Contents

Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Document Structure PrefacePurpose of this Document For all users Related Documentation Readers Comments Reading Path = Tutorial System Manager Application ProgrammerIf V2 to Reliable Transaction Router Introduction RTR Continuous Computing Concepts RTR Continuous Computing Concepts RTR Terminology RTR Terminology Client Symbol Server Symbol Roles Symbols Components in the RTR Environment Nontransactional messaging Transaction ID Controller Business Logic Odbc Model Database ServerApplication Presentation RTR Frontend PC Browser Journal Browser 11 RTR Deployed on Three Nodes 12 Standby Server Conﬁguration 13 Transactional Shadowing Conﬁguration RTR Server Types RTR Server Types Standby server Standby in a cluster 15 Standby Servers 16 Shadow Servers Server1 Server2 Server3 Server4 17 Concurrent Servers Partition a Transaction 19 Bank Partitioning Example Standby Server Conﬁgurations Anonymous clients Tunnel RTR Networking Capabilities RTR Networking CapabilitiesPage Three-Layer Model Architectural Concepts Three Layer Model Three-Layer Model RTR Facilities Bridge the Gap RTR Facilities Bridge the GapBroadcasts Flexibility and Growth Flexibility and Growth Transaction Integrity Partitioned Data Model Partitioned Data ModelObject-Oriented Programming Partitioned Data Model Object-Oriented Programming Functional and Object-Oriented Programming Compared Objects Example 2-1 Objects-Deﬁned Sample Messages Class Relationships Polymorphism Object Implementation Beneﬁts XA Support XA Support Servers Reliability Features Failover and Recovery Failover and RecoveryRecovery Scenarios Recovery Scenarios Backend Recovery Router Recovery Frontend RecoveryPage RTR Interfaces RTR Management Station RTR Management Station RTR Create Facility DESIGN/ALLROLES=NODEA RTR RTRRECEIVEMESSAGE/TIME=0 RTR RTRSTARTTX/CHAN=C Interface Application Programming Interfaces RTR Browser Interface Application Programming Interfaces RTR C Example of an open channel call in an RTR client program RTR System Management Environment RTR Environment Rtrcomserv RTR System Management Environment Management Station Running Browser Software RTR System Management Environment Monitoring RTR RTR Runtime Environment Optional External Applet Not Running RTR Runtime EnvironmentClient Application Whats Next? Whats Next?Page Glossary Channel BranchBroadcast Callout server Data object Common classesConcurrent server Data marshalling Event driven Fault tolerantEndian Event Key range FrontendInquorate Journal Multithreaded MessageMessage handler Multichannel Property classes PrimaryProcess Properties RTR environment RollbackRouter RTR conﬁguration Transaction controller ShadowStandby Transaction Transactional shadowing Two-phase commitTransactional message Index-1 Index Index-2