Log Config Filename and Location
ps-data-directory/portals/portal-ID/config/PSLogConfig.properties
Example
/var/opt/SUNWportal/portals/myPortal/config/PSLogConfig.properties
Logfile Location
ps-data-directory/portals/portal-ID/logs/instance-ID
By default only one file is created - portal.admin.portal.0.0.log