The Online Database Migration Guide

Updated: Sep 18

Summary:


Keeping up with latest trends technology helps to improve the overall performance of different institutions.


Database Migration is such technology, it is the process of moving data from one platform to another platform.


Migration is necessary for


· Including server or storage equipment replacements


· Maintenance and upgrades


· Website consolidation


· Disaster recovery


· Data center relocation


· Saving expenses


· Reduce data redundancy


· Security fixes



Different applications using database are updated from time to time to allow new features and fix existing problems.


Along with applications databases are also need to be updated. Data Migration is also a way of updating database but by entirely migrating the data to another database.


Let's dive in and know more about Database Migration.



Challenges In migration:


Since database migration is a complex process there are challenges that require attention, Like


· Identification of data stored in different places


· Data analysis at the earliest


· Devising a migration strategy


· Lack of integrated process


· Data cleaning and coding


· Not evaluating final results in a timely manner


· Lack of collaboration


· Emphasize more on data analysis


· Securing data and systems.



Types of Data Migration


1. Storage Migration


Migrates data from one storage location to another.


2. Database Migration


Database migration involves moving from one DBMS to another or upgrading the current version of DBMS.



3. Application Migration


Moving data from one computing environment to another.



4. Cloud Migration


Movement of data or applications from an on-premises location to the cloud or from one cloud environment to another.


5. Business Process Migration


Movement of business applications and data on business processes and metrics to a new environment.


6. Data Center Migration


Migration of data center infrastructure to a new physical location or to the updated infrastructure at the same location.



How does it work:


1.Pre migration


Steps that needto be followed before actually starting the migration.


  • Planning

  • Structuring

  • Understanding the requirements

  • Finalising the process.

2.Migration Analysis and Design


  • Understanding the source database

  • Analysing the data complexity

  • Define norms and rules

  • Evaluate data quality

  • Selecting proper tools

3.Migration implementation

  • Building and deploying new database schema

  • Adding a new data access object

4.Post Migration

  • Validation test and repair

  • Designing and tuning for performance


Simple Example
Consider an application in our mobile, if a new version is developed for this application the data that is stored in the database of older version will be migrated to database of new application.
In doing so, the procedure mentioned above is followed.


Conclusion:


While performing an actual database migration, it is a very complicated task because of loads of data across multiple servers, it's difficult to migrate all the data at once.


We need to perform one step at a time in order to test the process.


However, database Migration becomes really easy if the procedure is well planned and executed with proper resources.

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