![]() Migrate tools and software, and enable triggers.Ĭreate your schema in the target databaseīegin your migration by taking a look at the schema that you want to migrate.Stop the task when the full load phase is complete, and recreate foreign keys and secondary indexes.Set up a DMS task to replicate your data – full load and change data capture (CDC).Drop foreign keys and secondary indexes on the target database, and disable triggers.Create your schema in the target database.If you aren’t moving to a different platform, you might find more appropriate native tools or other techniques to move your database. In this blog, we will focus on migrating the database from Oracle to PostgreSQL, using the steps suggested below. The objects, like PL/SQL packages and procedures, need to be manually migrated if SCT cannot translate them, or considered to be moved back to the client software. ![]() This process requires client software changes, but it reduces the complexity and size of the database and makes the overall system more efficient. Second, move flat files and long strings stored in LOBs, CLOBs, LONGs, and so on into Amazon S3 or Amazon Dynamo DB. You don’t want to waste time replicating data you don’t need, for example temporary tables and backup copies of tables from past maintenance. Also, purge any historical data that you no longer need. Don’t waste time migrating objects that no one cares about. This phase involves taking an inventory of objects in your Oracle database and then making a few decisions.įirst, deprecate any objects that are no longer needed. One way to make the migration easier is to have what is usually called a modernization phase before the migration. ![]() We go over how to use the AWS Schema Conversion Tool (AWS SCT) and the AWS Database Migration Service (AWS DMS) to tackle these two parts.īefore we cover SCT and DMS, you should take some preliminary steps that have been proven to be helpful for every migration. The two biggest parts of a database migration are the schema conversion and the data replication. This blog post provides an overview on how you can migrate your Oracle database to PostgreSQL. Knievel Co is a database engineer at Amazon Web Services.
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