When Apache Met Yaws

Apache and Yaws are web servers.

How well does apache perform against yaws?

The diagram gives the answer.

 The red curve is yaws (running on an NFS file system). The blue curve is apache (running on an NFS file system). The green curve is apache (running on a local file system).

The result was generated  with a 16 node cluster running at SICS. The apache version is 2.0.39.

The conclusion (or interpretation):

Apache dies at about 4,000 parallel sessions. Yaws is still functioning at over 80,000 parallel connections.

Source: http://www.sics.se/~joe/apachevsyaws.html