RTR Runtime Environment | Compaq Reliable Transaction Router

The RTR Runtime Environment

•Server application

•RTR shareable image, LIBRTR

•RTR control process, RTRACP

•RTR daemon, RTRD

Figure 5–2 shows these components and their placement on frontend, router, and backend nodes. The frontend, router, and backend can be on the same or different nodes. If these are all on the same node, there is only one RTRACP process.

Figure 5–2 RTR Runtime Environment

FE

LIBRTR/RTRDLL

Client

Application

RTRACP

RTRD

RTR

COMSERV

RTR CLI

Optional

External

Applet

Not Running

RTR

TR

LIBRTR/RTRDLL

RTRACP

RTRD

RTR

COMSERV

BE

LIBRTR/RTRDLL

Server

Application

RTRACP

RTRD

RTR

COMSERV

RTR CLI

LKG-11215-98WI

5–6The RTR Environment

Image 64

Compaq Reliable Transaction Router manual RTR Runtime Environment, Client Application, Optional External Applet Not Running

Contents

Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Purpose of this Document PrefaceDocument Structure Related Documentation For all users Reading Path Readers Comments If V2 to System Manager Application Programmer= Tutorial Introduction Reliable Transaction Router 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 PC Browser RTR Frontend Browser Journal 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 17 Concurrent Servers Server1 Server2 Server3 Server4 Transaction Partition a 19 Bank Partitioning Example Standby Server Conﬁgurations Anonymous clients Tunnel RTR Networking Capabilities RTR Networking CapabilitiesPage Architectural Concepts Three-Layer Model Three-Layer Model Three Layer Model RTR Facilities Bridge the Gap BroadcastsFlexibility and Growth RTR Facilities Bridge the Gap Transaction Integrity Flexibility and Growth Object-Oriented Programming Partitioned Data ModelPartitioned Data Model Object-Oriented Programming Partitioned Data Model Objects Functional and Object-Oriented Programming Compared Messages Class Relationships Example 2-1 Objects-Deﬁned Sample Polymorphism Object Implementation Beneﬁts XA Support XA Support Reliability Features Servers Recovery Scenarios Failover and RecoveryFailover and Recovery Backend Recovery Router Recovery Frontend Recovery Recovery ScenariosPage RTR Interfaces RTR Management Station RTR Management Station RTR Create Facility DESIGN/ALLROLES=NODEA RTR RTRRECEIVEMESSAGE/TIME=0 RTR RTRSTARTTX/CHAN=C Application Programming Interfaces Interface Application Programming Interfaces RTR Browser Interface RTR C Example of an open channel call in an RTR client program RTR Environment RTR System Management Environment RTR System Management Environment Rtrcomserv RTR System Management Environment Management Station Running Browser Software Monitoring RTR RTR Runtime Environment Client Application RTR Runtime EnvironmentOptional External Applet Not Running Whats Next? Whats Next?Page Glossary Branch BroadcastCallout server Channel Common classes Concurrent serverData marshalling Data object Fault tolerant EndianEvent Event driven Frontend InquorateJournal Key range Message Message handlerMultichannel Multithreaded Primary ProcessProperties Property classes Rollback RouterRTR conﬁguration RTR environment Shadow StandbyTransaction Transaction controller Transactional message Two-phase commitTransactional shadowing Index Index-1 Index-2