In the modern times, the need for data management is not hidden from anyone who knows the importance of information technology in various fields. The movement of one platform to another is known as migration in the context of the web-based application. The database migration involves the complications of changing the software platform. The new platform has many features of the older versions, or various new features, or features of the old version with different functions in the new platform.
In the world of the database, many developers and engineers tried to build applications without the database using the concept of ORM’s, object-relational mappers. This idea to build standard features and components that are easily transferred from one platform to another seems easy, but it is not so true also.
Database Migration
Almost all the computing environments need the movement of the database across different operating systems. The database migration allows the change of the hardware or the operating system. In some database migration applications, transportable platforms are alike though the endian formats vary while in other applications disk formats are not the same throughout the disk.
Zero Downtime migration
Using database migration in Oracle in combination with Oracle database features, migration can be achieved without any time lag. Using this process, the application can be easily made familiar with the new environment, and the application outage can be minimised. With the help of heterogeneous database movement method, oracle golden gate takes slight database downtime for the database migration.
Oracle golden gate is a wonderful application and provides guaranteed transformation, routing, data capture and delivery across both the homogenous and nonhomogenous business systems. The goldengate migration uses low overhead architecture to carry out transactions nonintrusively from the main database to the targeted database. The transactions in oracle goldengate processes run continuously, supports high volume, rapid and even bidirectional changing environments with a very low impact. The transaction takes place in large number from the database replica at the logical level and can be easily leveraged for multiple applications.
Oracle
Oracle provides a broad range of migration services that optimise the Oracle technology. Oracle can provide great assistance in the migration from non-oracle technologies to Oracle with the help of tools, resources, and best-proven practices. Database migration provides many tools for migrating a non-oracle database to Oracle database. One such tool is the Oracle SQL Developer. The migration of the database using this tool minimises the risk factor, time, and financial barriers that are accompanied in moving the Oracle platform.
Various high-level steps in migration
- The application points to the source database of the older software version.
- A target logical database copy is formed simultaneously while the older one is still in use.
- The target database is upgraded to new database version.
- All access to the older version is stopped.
- The application is pointed to the new database version
- The older or the source database is kept as such for any failback reason.
