cat app.access.log | grep '01/Jun/2011:10:' | grep ' 200 ' | awk '{ if ( $11 != "\"-\"" ) print }' | wc -l
cat app.access.log | grep '01/Jun/2011:10:' | grep ' 200 ' | awk '{ if ( $11 != "\"-\"" ) print $1}' | uniq | wc -l