DHCP Failover and Performance

[Chris Buxton]

The performance goal of the failover protocol was to have two servers perform nearly as fast as one. That is, the failover protocol itself should impose not much more than a 50% penalty on per-box performance.

In my experience, the performance of a failover pair can range from about 70% to about 130% of that of a single box with the same config, with the variation based apparently on DDNS configuration. Without DDNS, it appears to usually come in around 130%.

When you say "dramatic effect", what exactly do you mean? Can you be more specific?

Regards,
Chris Buxton
BlueCat Networks

On Feb 22, 2012, at 12:31 AM, Smith Bill wrote:

> Hi
>  
> I have recently set up a proof of concept system and configured DHCP for failover; one of my initial observations is that configuring failover seems to have a dramatic effect upon the time taken to issue an IP Address.
>  
> Does anyone have any performance data for ISC DHCP that they could share please?
>  
> Regards
>  
> Bill Smith
> Senior Solutions Architect
> Architecture & Design H&NS North
> Fujitsu Services
> Tel: 07867 821165
> Email:bill.smith at uk.fujitsu.com
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