The Challenges in Database Migration
“What new technology does is create new opportunities to do a job that customers want done.”
Since every business exists to cater to its customers’ requirements, it is important for every
business to embrace emerging technologies that aid in enhancing its overall performance and
productivity. Database migration is aimed at improving productivity of businesses. It is the process
through which data is migrated from one or multiple source databases to one or numerous target
databases, with the aid of using a service for database migration. Upon completion of the migration
process, the dataset that is in the source databases comes into existence totally in the target
databases, even if it is possibly restructured. Subsequently, those clients that accessed the source
databases are migrated to the target databases.
Active-passive vs. Active-active Database Migration
There is a difference with regard to whether both, the source as well as the target databases, have
the option to modify query processing. The source databases are capable of being modified during
the process of migration in an active-passive database migration. In it, only the read-only access is
permitted by the target databases. Clients writing into both, the source databases and the target
databases, are supported by an active-active migration during the process of database migration.
There is the possibility of conflicts occurring in this type of migration, for which one might need to
run rules for conflict resolution in order to resolve the conflict. If there is a failure to resolve all data
conflicts, then it might result in data inconsistency.
Any application that uses a database needs to be updated from time to time for supporting new
features or for fixing the scaling problem. Hence, the developers need to implement the necessary
changes as well as updates while developing a software. Before proceeding and delving deeply into
the challenges in database migration, l