Transplantation And Transformation Of The Banking System And Achieve

Having been developed and put into run,the application software enters into maintenance phase of software.Because of all kinds of varying factors in software maintenance phase,the performance of application software becomes gradually unsatisfactoried to users.Hence,performance optimalization in software maintenance phase takes important part in all software lifecycle.However,even though some application systems have been tuned in performance in the same hardware platform,their performances are still not able to satisfy with users requirement,then choosing either proceeding new development or migrating existing system to new hardware platform ,will become an annoying question to department or enterprise leader.System migration always is a serious decision due to existing application system unable to satisfy with nowadays business requirement.System migration differs not only from software development,but from pure maintenanceas well.Firstly,it must implement existing system function.but then in new system environment. Secondly,system migration has more relative with new system environment ,but it also has tightly relative with existing system..While preceding system migration ,it is always true for programmer to understand existing system development/business performing flow, then coordinate existing system development tools in order to reuse in new environment.Due to compatibility between new system and existing system,code must be modified in migration.Functioning normally in existing system ,application program may encounter any unexpected abnormal behavor while being put into run in new system.Due to new system adopting 64bit computer in the project of WuXi Commercial Bank Integrated Business System migration,the difficulty in migration is more than ever.lt is no doubt that 64bit computing provides the material base to improve the performance of huge data OLTP affair.In order to make the best of 64bit computing ,it must be done to modify existing code.This article analyses programming on 64bit platform,points out that it is the change of data type in 64bit program that results in the 64bit program differing from 32bit program.Then it discusses C for AIX compiler supporting to 64bit program.Existing code modification is only one aspect in system migration project.In order to guarantee existing function implementation normally and to improve new system performance,new system must be scientifically configured.This article describes the whole installation procedure on RS/6000 series machines.In OLTP affair,database performance takes a key role.lt is an efficient approach to improve application system performance by scientifically and rati-onally tuning and configuring database.This article puts forward disks allocati-on strategy which greatly affects database performance ,and discusses those configuration parameters which are closely relative with database performance.Configuring/establishing filesystem has to do with the I/O balancing of the application.lt can greatly improve application performance by rationally establishingfilesystem/dbspace on the available disks.This article discusses and implements some performance optimalization measures.The system trustiness and availability of key-mission such as bank busin-ess are as important as performance,even more. HACMP software of IBM Co.Ltd provides practical solution to resolve questions such this. HACMP provides two machines online backup each other by providing hardware resource redu-ndance and scientically managing these hardware resources. It can provide hi-gh availability environment to bank business by rationally configuring HACMP. In order to configuring HACMP on RS/6000 S80 computers, it is required that makes a configuration plan firstly which includes network resources and shared disks resources and volume group and logical volume which established on the shared disks. Then it is described in this article that the whole procedure of setup HACMP on two S80 machines.