Java system properties and JMeter properties can be overridden directly on the command lin (instead of modifying
jmeter.properties). To do so, use the following options:
-D[prop_name]=[value]
defines a java system property value.
-J[prop_name]=[value]
defines a local JMeter property.
-G[prop_name]=[value]
defines a JMeter property to be sent to all remote servers.
-G[propertyfile]
defines a file containing JMeter properties to be sent to all remote servers.
-L[category]=[priority]
overrides a logging setting, setting a particular category to the given priority level.
The -L flag can also be used without the category name to set the root logging level.
из официальной страницы