This test was conducted with 20 clients (from here on referred to as minions),
also acting as web servers with lighttpd. A Raspberry
Pi B revision 1 was used as load balancer. The revision 1 part is important,
because it only has 256 MB of RAM. The later revision 2 har 512 MB and would be
capable of handling more connections.
The test used 625 idle connections on each minion, along with 625 active connections
for a total of 20*(625+625) = 25000 connections to Pen. Since each connection *to*
Pen also results in a connection to the back-end server, that’s a total of 50000
TCP connections on the poor Pi.
20 of 20 succeded Idle Connections: 12500 Active Connections: 12500 Total Concurrency Level: 25000 Average time taken for tests: 30.608 seconds Complete requests: 12500 Failed requests: 0 Total transferred: 5425000 bytes HTML transferred: 2212500 bytes Requests per second: 408.38 [#/sec] (mean) Transfer rate: 173.08 [Kbytes/sec] received