simulate high latency replica sets (mac)

simulateSlowMongod.sh

# first set up a pipe named "2" with bandwidth 
# limited to 16kbit/s and latency of 100ms
sudo ipfw pipe 2 config bw 16Kbit/s delay 100ms

# next add rule #1 using the pipe we set up, configured to 
# act only on local tcp traffic going to port 27019
sudo ipfw add 1 pipe 2 tcp from me to me 27019 out

# now you should be observing slow ping times for
# mongod on 27019

# let's disable rule #1
sudo ipfw delete 1

# back to normal!

# our pipe still exists so if we want to enable it again
sudo ipfw add 1 pipe 2 tcp from me to me 27019 out