Introduced in GitLab 13.7.
Group migration by direct transfer is the evolution of migrating groups and projects using file exports. The goal is to have an easier way for the user to migrate a whole group, including projects, from one GitLab instance to another.
ETL, for extract, transform and load, is a data integration process that combines data from multiple data sources into a single, consistent data store that is loaded into a data warehouse or other target system.
Using ETL architecture makes the code more explicit and easier to follow, test and extend. The idea is to have one ETL pipeline for each relation to be imported.
GitLab Group migration leverages on GitLab API to speed the migration.
And, because we’re on the road to GraphQL, GitLab Group Migration will be contributing towards to expand the GraphQL API coverage, which benefits both GitLab and its users.
The migration process starts with the creation of a
record to keep track of the migration. From there all the code related to the
GitLab Group Migration can be found under the new
BulkImports namespace in all the application layers.