Compaq Reliable Transaction Router manual RTR Server Types

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RTR Server Types

Figure 1–14 Two Sites: Transactional and Disk Shadowing with Standby Servers

FE

TR

TR

BE

BE

BE

BE

Disk

Shadowing

Transactional

Shadowing

Standby Server or Router

LKG-11212-98WI

RTR Server Types

In the RTR environment, in addition to the placement of frontends, routers, and servers, the application designer must determine what server capabilities to use. RTR provides four types of software servers for application use:

•Standby servers

•Transactional shadow servers

Introduction 1–15

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Contents Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Purpose of this Document PrefaceDocument Structure For all users Related DocumentationReaders Comments Reading PathIf V2 to System Manager Application Programmer= Tutorial Reliable Transaction Router IntroductionRTR Continuous Computing Concepts RTR Continuous Computing ConceptsRTR Terminology RTR TerminologyClient Symbol Server Symbol Roles Symbols Components in the RTR Environment Nontransactional messaging Transaction ID Controller Application Presentation Database ServerBusiness Logic Odbc Model RTR Frontend PC BrowserJournal Browser11 RTR Deployed on Three Nodes 12 Standby Server Conﬁguration 13 Transactional Shadowing Conﬁguration RTR Server Types RTR Server TypesStandby server Standby in a cluster 15 Standby Servers 16 Shadow Servers Server1 Server2 Server3 Server4 17 Concurrent ServersPartition a Transaction19 Bank Partitioning Example Standby Server Conﬁgurations Anonymous clients Tunnel RTR Networking Capabilities RTR Networking CapabilitiesPage Three-Layer Model Architectural ConceptsThree Layer Model Three-Layer ModelBroadcasts RTR Facilities Bridge the GapFlexibility and Growth RTR Facilities Bridge the GapFlexibility and Growth Transaction IntegrityObject-Oriented Programming Partitioned Data ModelPartitioned Data Model Partitioned Data Model Object-Oriented ProgrammingFunctional and Object-Oriented Programming Compared ObjectsExample 2-1 Objects-Deﬁned Sample Messages Class RelationshipsPolymorphism Object Implementation Beneﬁts XA Support XA SupportServers Reliability FeaturesRecovery Scenarios Failover and RecoveryFailover and Recovery 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 InterfacesRTR Browser Interface Application Programming InterfacesRTR C Example of an open channel call in an RTR client program RTR System Management Environment RTR EnvironmentRtrcomserv RTR System Management EnvironmentManagement Station Running Browser Software RTR System Management EnvironmentMonitoring RTR RTR Runtime Environment Client Application RTR Runtime EnvironmentOptional External Applet Not Running Whats Next? Whats Next?Page Glossary Broadcast BranchCallout server ChannelConcurrent server Common classesData marshalling Data objectEndian Fault tolerantEvent Event drivenInquorate FrontendJournal Key rangeMessage handler MessageMultichannel MultithreadedProcess PrimaryProperties Property classesRouter RollbackRTR conﬁguration RTR environmentStandby ShadowTransaction Transaction controllerTransactional message Two-phase commitTransactional shadowing Index-1 IndexIndex-2