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Database Migration

December 14th, 2016 | by Benny Sanderson
Database Migration
Development
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Database migration is the process of transferring databases between storage types, formats, or computer systems. Companies and organizations migrate their databases for a variety of reasons:

  • Server or storage equipment replacements
  • Server maintenance or upgrades
  • Application migration
  • Website consolidation
  • Data center relocation.

The process involves transfer of all database objects and categories:

  • Table definitions
  • Data
  • Indexes
  • Constraints
  • Views
  • Triggers
  • Stored procedures
  • Functions
  • User accounts, roles and permissions.

Databases can be migrated manually or programmatically by using special software named database migration tools.

Manual Migration

Manual process usually consists of these steps:

  • Exporting table definitions along with indexes and constraints from the source database in form of SQL statements
  • Conversion of these statements into the destination format and importing to the target database
  • Exporting data from the source database into an intermediate storage like comma separated values (CSV) files
  • Transforming the data according to the destination format and loading it to the target database
  • Extracting views, stored procedures/functions and triggers from the original database in form of SQL statements and code
  • Conversion of these statements and code into the destination format and loading into the target database

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Data Verification

After loading into the new system, results are subjected to data verification in order to determine if the data has been accurately translated, it is complete and supports processes in the new system. During verification, there may be a need for a parallel run of both systems to identify areas of disparity and erroneous data loss.

Programmatically Migration

For large and complex database projects, migration is usually performed programmatically to achieve an automated process flow, freeing up human resources from tiresome tasks. It is very important to select the appropriate tool to migrate the database in the required time frame without data loss or corruption.

Here is list of main features that must be provided by high quality database migration tools:

  • Recent versions of source and destination DBMS are supported
  • Table definitions, indexes and constraints are converted with all necessary attributes
  • Conversion settings must be stored into a profile for next use
  • Full Unicode support
  • Options to customize types mapping, conversion rules, etc
  • Command line support
  • Comprehensive documentation and 24/7 support service

There are a large number of software companies that offer dedicated tools to automate database migration.Intelligent Converters specializes in database conversion, migration and synchronization since 2001 and has been developing wide range of conversion tool to migrate databases between all popular database management systems like MySQL, PostgreSQL, SQL Server, Azure SQL, Oracle, Microsoft Access, FoxPro, SQLite.

Visit http://www.convert-in.com for more information about Intelligent Converters and their software.

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