Checking Whether the Destination Database Has Sufficient Storage Space

In the migration phase, DRS uses the row-level parallel migration mode to ensure migration performance and transmission stability. If the source database data is compact, the destination database will use more storage space than the source database after DRS migration. DRS checks the available storage space of the destination database during the pre-check. If the storage space is insufficient, the migration may fail.

Failure Cause

If the storage space of the destination database is insufficient, it is recommended that the size of the destination database disk be set to the smaller value of the following two values:

1.5 or 2.5 times the size of the data to be migrated in the source database.
The size of the data to be migrated in the source database plus 200 GB.

The available storage space of the destination database is subject to the information displayed on the page.

Handling Suggestion

If the pre-check fails, scale up the storage of the destination database or clear data in the destination database and perform the pre-check again.
For details about how to scale up an RDS for MySQL DB instance, see Scaling Up Storage Space.

If you choose to clear data in the destination database, the storage usage decreases within 2 to 3 minutes.
If the task fails, scale up the storage of the destination database or clear data in the destination database and click Resume in the Operation column to continue the task.