# Performing Prerequisites on the Source Database

+ Before migrating a `On-Premises MySQL / MariaDB` database, collect some necessary information about the source database:
  + The time zone of the source database.
  + The size of the source database.
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Before migrating a `On-Premises MySQL / MariaDB` database, collect some necessary information about the source database, such as:
1. The time zone of the source database:
```
SELECT @@global.time_zone;
```
2. The size of the source database. This is required for provisioning the target database with adequate capacity to accommodate the migrated database.