[CentOS] Centos Router
kprice at nowyouknow.net
Tue Sep 11 17:43:31 UTC 2007
>> My best tip for tuning performance:
>> Don't until performance becomes an issue otherwise you have no
>> basis of determining whether performance has improved.
> Let me add a second tip:
> Don't tune a parameter unless you know what is does.
While probably not popular, those are very good tips.
I can give you some comparative performance info using CentOS3 and
CentOS4. CentOS5 will probably give equal or slightly better
performance depending on specific configurations.
4 Dell PowerEdge 350's (2 routers, 2 NAT firewalls)
512 Mb RAM
Peak 80Mbps sustained for 1-2 hours
CPU usage approx 2-8%
CPU usage approx 2-4%
With the above specs, I was approaching the connection threshold with
512Mb RAM (32768 = theoretical max) and beginning to drop connections.
This was quickly fixed by adding an additional 512Mb RAM and
adjusting the CONNTRACK_MAX accordingly.
Hope this helps. All boxes were running Keepalived for failover.
Fairly straight forward routing so no software used except routing
tables, IP, and IP forwarding.
Hope this helps!
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