This was tested on centos 6.3. It is running at approx 900 – 3,000+ log events per second from approx 30 hosts.
Current load is about 900 messages per second: load average: 1.57, 1.35, 1.29 with 8GB memory.
With the above in mind, there was approx 165GB of log data after running for 4 days.
I wrote a script in order to install a graylog2 central log server. Its a one shot run and be done kinda thing…..
CHANGES: 20130309 – see notes in script