In Aurora replication, you have separate reader and writer endpoints however because the cluster shares the underlying storage layer, `gh-ost` will detect it is running on the master. This becomes an issue when you wish to use [migrate/test on replica][migrate_test_on_replica_docs] because you won't be able to use a single cluster in the same way you would with MySQL RDS.
To work around this, you can follow along the [AWS replication between clusters documentation][aws_replication_docs] for Aurora with one small caveat. For the "Create a Snapshot of Your Replication Master" step, the binlog position is not available in the AWS console. You will need to issue the SQL query `SHOW SLAVE STATUS` or `aws rds describe-events` API call to get the correct position.
If you use `pt-table-checksum` as a part of your data integrity checks, you might want to check out [this patch][percona_toolkit_patch] which will enable you to run `pt-table-checksum` with the `--no-binlog-format-check` flag and prevent errors like the following:
```
03-24T12:51:06 Failed to /*!50108 SET @@binlog_format := 'STATEMENT'*/: DBD::mysql::db do failed: Access denied; you need (at least one of) the SUPER privilege(s) for this operation [for Statement "/*!50108 SET @@binlog_format := 'STATEMENT'*/"] at pt-table-checksum line 9292.
This tool requires binlog_format=STATEMENT, but the current binlog_format is set to ROW and an error occurred while attempting to change it. If running MySQL 5.1.29 or newer, setting binlog_format requires the SUPER privilege. You will need to manually set binlog_format to 'STATEMENT' before running this tool.
