Throughput Tests
These tests were run to estimate the expected volume of data passing from the
kernel to the back end. All of the tests were run on RedHat 7.2, at runlevel
5, with X and httpd running, and one xterm open (as well as standard background
processes).
| HTTPD | RW Data | BPS | EPS |
|---|
| no | no | 221 | 2 |
| no | yes | 21965 | 116 |
| yes | no | 6054 | 49 |
| yes | yes | 383929 | 249 |
Interpreting the table:
- HTTPD "yes" means that httpd was active (this was done by
running wget -r in a loop, retrieving data from the frontend machine).
- RW data "yes" means that reads and writes were being audited.
- BPS - bytes per second.
- EPS - events per second.
The throughput was calculated using the "calc_throughput" utility program
(included in the 4N6 tarball), with a sleep time of 60 seconds. There was
no network logging going on during this test.
These results give us a half-decent estimate of what average system loads are
like when running 4N6, and what peak loads might look like.
Mike Shea
Last modified: Mon Mar 10 11:55:55 PST 2003