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The MySQL Test Framework, Version 1.0
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The MySQL Test Framework, Version 1.0  /  Running Test Cases  /  Constraints on Simultaneous Test Runs

3.1 Constraints on Simultaneous Test Runs

To perform multiple test runs simultaneously on the same machine, you must specify for each invocation which ports to use so that no test run conflicts with others running concurrently. To do this, add unique port arguments to, such as --master_port=3911 --slave_port=3927 --no-manager.

Only one instance of can run at a time in the same mysql-test directory on a shared drive. The mysql-test/var directory created and used by cannot be shared between simultaneous test runs. A test run can use the --var=dir_path option to specify an alternate directory not used by other runs.