RTR Server Types | Compaq Reliable Transaction Router manual

RTR Server Types

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

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TR

TR

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Disk

Shadowing

Transactional

Shadowing

Standby Server or Router

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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

Image 25

Compaq Reliable Transaction Router manual RTR Server Types

Contents

Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Purpose of this Document PrefaceDocument Structure For all users Related Documentation Readers Comments Reading Path If V2 to System Manager Application Programmer= Tutorial 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 Application Presentation Database ServerBusiness Logic Odbc Model 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 Broadcasts RTR Facilities Bridge the GapFlexibility and Growth RTR Facilities Bridge the Gap Flexibility and Growth Transaction Integrity Object-Oriented Programming Partitioned Data ModelPartitioned Data Model 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 Recovery 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 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 Client Application RTR Runtime EnvironmentOptional External Applet Not Running Whats Next? Whats Next?Page Glossary Broadcast BranchCallout server Channel Concurrent server Common classesData marshalling Data object Endian Fault tolerantEvent Event driven Inquorate FrontendJournal Key range Message handler MessageMultichannel Multithreaded Process PrimaryProperties Property classes Router RollbackRTR conﬁguration RTR environment Standby ShadowTransaction Transaction controller Transactional message Two-phase commitTransactional shadowing Index-1 Index Index-2