Data migration
There is a difference between data migration and data integration activities. Data migration is a project by means of which data will be moved or copied from one environment to another, and removed or decommissioned in the source. During the migration (which can take place over months or even years), data can flow in multiple directions, and there may be multiple migrations taking place simultaneously. The ETL (extract, transform, load) actions will be necessary, although the means of achieving these may not be those traditionally associated with the ETL acronym.
TR-196
As discussed in the earlier section on the historical background of Issue 2, Issue 2 is not backward-compatible with Issue 1 Data Model. This implies that migrating from Issue 1 to Issue 2 requires complete change in the Data Model support and implementation in the software. This can potentially lead to migration issue in commercial deployment.