Database migration is the process of transferring databases across different storage types, formats, or platforms. Businesses and organizations may need to implement database migration for a variety of reasons, including server or storage equipment replacement, maintenance or upgrade, application transfer, website consolidation, and data center relocation. This procedure involves transferring all database objects and related properties, including table definitions, data, indexes, constraints, views, triggers, stored procedures and processes, as well as user accounts, roles, and permissions from source DBMS to the destination.
Databases may be moved manually or programmatically using specialized software referred to as database migration tools. Typically, a manual method entails the following steps:
Immediately after loading to the new program, the completed data must be examined to see if the database was transferred successfully, is complete, and has the necessary support for the new system’s programs. Verification process may require both the source and destination database systems simultaneously to identify areas of discrepancy and avoid data loss or damage.
Main challenge of data migration is reducing the required downtime of the source database to achieve tolerance of the particular business model. Of course, the more high loaded system the less downtime frame is acceptable. This section explores 3 most common approaches to data migration with their own cons and pros: snapshot, parallel snapshot and change data replication.
For large and complex database migration projects, it is better to do them programmatically in order to create an automated process flow and relieve human resources of difficult work. It is critical to choose the appropriate technology to migrate the database within the specified timeframe and without data loss or corruption.
The following is a list of major functionalities that may be enabled with the usage of superior database migration tools:
Numerous software companies provide specialized resources for automating database migration. Intelligent Converters is one of these firms, having been in the database conversion, migration, and synchronization business since 2001. They provide a range of conversion tools that facilitate database migrations across popular database management systems such as PostgreSQL, MySQL, Oracle, SQL Server, Azure SQL, Microsoft Access, FoxPro, and SQLite.
Intelligent Converters software uses efficient low-level techniques of reading and writing the data combined with parallel chunks multi-threading algorithms specified above. This allow to read high performance about 10 millions of rows (500 megabytes of data) per second on an average modern hardware platforms. Besides, the option to filter migrated data through SELECT-queries makes the database migration even more flexible since it allows to exclude or rename columns, transform the data and merge data from multiple tables into a single one.
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