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Compaq Reliable Transaction Router manual 9 RTR with Browser, Single Node, and Database

Models: Reliable Transaction Router

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Figure 1–9 RTR with Browser, Single Node, and Database

RTR Terminology

single node conﬁguration can be useful during development, but would not normally be used when your application is deployed.

Figure 1–9 RTR with Browser, Single Node, and Database

Browser

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When creating the conﬁguration used by an application and deﬁning the nodes where a facility has its frontends, routers, and backends, the setup must also deﬁne which nodes will have journal ﬁles. Each backend in an RTR conﬁguration must have a journal ﬁle to capture transactions when other nodes are unavailable. When applications are deployed, often the backend is separated from the frontend and router, as shown in Figure 1–10.

Figure 1–10 RTR Deployed on Two Nodes

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Introduction 1–11

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Compaq Reliable Transaction Router manual 9 RTR with Browser, Single Node, and Database, 10 RTR Deployed on Two Nodes

Contents

Reliable Transaction Router Getting Started Revision/Update Information This is a new manualJanuary Compaq Computer Corporation Houston, TexasThis document was prepared using VAX DOCUMENT, Version 2001 Compaq Computer CorporationUNIX and The Open Group are trademarks of The Open Group Introduction Architectural ConceptsContents 4 RTR Interfaces 3 Reliability Features5 The RTR Environment Glossary Index ExamplesTables FiguresPage Preface Purpose of this DocumentDocument Structure Router Installation RTR CommandsRelated Documentation For all usersReaders Comments Reading PathConventions New termSystem Manager Figure 1 RTR Reading PathApplication Programmer If V2 toReliable Transaction Router IntroductionRTR Continuous Computing Concepts RTR Terminology Figure 1-1 Client Symbol Channel RTR conﬁguration Roles Figure 1-2 Server SymbolFigure 1-3 Roles Symbols Figure 1-4 Facility SymbolFE TR Figure 1-5 Components in the RTR Environment 1-8 Introduction Nontransactional messaging Transaction ID Transaction ControllerFigure 1-7 Three-Tier Client/Server Environment Figure 1-6 Two-Tier Client/Server EnvironmentFigure 1-8 Browser Applet Conﬁguration Web Server Process RTR Client Application1-10 Introduction Figure 1-10 RTR Deployed on Two Nodes Figure 1-9 RTR with Browser, Single Node, and Database1-12 Introduction Figure 1-11 RTR Deployed on Three NodesTransactional shadowing RTR Journal Figure 1-12 Standby Server ConﬁgurationFigure 1-13 Transactional Shadowing Conﬁguration RTR Server Types Concurrent servers Callout servers Transactional shadow server Figure 1-15 Standby ServersFigure 1-16 Shadow Servers Figure 1-17 Concurrent Servers Figure 1-18 A Callout Server User Accounts FacilityFigure 1-19 Bank Partitioning Example TR A partition can also have multiple standby servers Router RTR Networking CapabilitiesPage The Three-Layer Model Architectural ConceptsZKO-GS011-99AI Figure 2-1 The Three Layer ModelRTR Facilities Bridge the Gap BroadcastsFlexibility and Growth Flexibility and Growth Transaction IntegrityObject-Oriented Programming The Partitioned Data ModelZKO-GS012-99AI Figure 2-2 Partitioned Data ModelTable 2-1 Functional and Object-Oriented Programming Compared ObjectsExample 2-1 Objects-Deﬁned Sample Messages Class RelationshipsPolymorphism Object Implementation Beneﬁts Programmers Reference Manual and the RTR Application Design Guide XA SupportServers Reliability FeaturesRecovery Scenarios Failover and RecoveryRecovery Router FailoverBackend Recovery Router Recovery Frontend Recovery Page RTR Interfaces RTR Management Station RTR Management Station RTR SHOW JOURNAL $ RTRRTR CREATE FACILITY DESIGN/ALLROLES=NODEA RTR SHOW FACILITYRTR show transaction RTR RTRRECEIVEMESSAGE/CHAN=SRTR RTRRECEIVEMESSAGE/TIME=0 $ RTR RTR START RTRRTR RTRSTARTTX/CHAN=C RTR RTRRECEIVEMESSAGE/CHANNEL=C/timenters commands at the server RTR show transactionBrowser Application Programming InterfacesInterface Object-OrientedFigure 4-1 RTR Browser Interface Application Programming InterfacesExample of object creation in an RTR server program RTR Cinterface, see the RTR C Application Programmers Reference Manual and the RTR Application Design GuideExample of an open channel call in an RTR client program The RTR System Management Environment The RTR EnvironmentHandles all transactions and recovery Page Management Monitoring RTRTransaction RTR Monitor pictures or the RTR Monitor let you view theThe RTR Runtime Environment PartitionManagement Figure 5-2 RTR Runtime Environment Whats Next? RTR Installation GuideRTR Release Notes RTR Migration Guide ifPage ACID Glossaryapplet applicationbroadcast branchcallout server channelconcurrent server common classesdata marshalling data objectendian frontend message process primaryproperties property classesrouter rollbackRTR conﬁguration RTR environmentstandby shadowtransaction transaction controllertwo-phase commit transactional messagetransactional shadowing Index-1 IndexIndex-2