The Network Server will attempt to create the trace directory (and any parent directories) if they do not exist. This will require that the Java security policy for derbynet.jar permits verification of the existence of the named trace directory and all necessary parent directories. For each directory created, the policy must allow permission java.io.FilePermission "<directory>", "read,write"; and for the trace directory itself, the policy must allow permission java.io.FilePermission "<tracedirectory>${/}-", "write";

See for information about customizing the Network Server's security policy.

If the derby.system.home property has been set, it is the default. Otherwise, the default is the current directory.

Dynamic. System values can be changed by using commands or the servlet interface after the Network Server has been started.