The log configuration file name is:
portal_server_data_directoryportals/portal_ID/config/PSLogConfig.properties
Example: /var/opt/SUNWportal/portals/myPortal/config/PSLogConfig.properties
The log file location is:
portal_server_data_directory/logs/admin/
Example: /var/opt/SUNWportal/logs/admin/
By default, one file is created. The file name is portal.admin.console.0.0.log.