workload myth: mice vs elephants


myth: 10% of flows contribute 90% of total traffic on a link

data:  
sometimes true for bytes 
if the link has KaZaa-type stuff
never true for packets 
in any traces we've studied
actual proportion of traffic (bytes or packets) covered by 90% of streams can change rapidly
following changes in the applications/protocol s mix


    --> need to measure proportions before making assumptions