DHCP transactions per second
David W. Hankins
David_Hankins at isc.org
Thu Jun 28 20:38:14 UTC 2007
On Thu, Jun 14, 2007 at 03:49:22PM -0700, Ian Anderson wrote:
> Both DHCPDISCOVER and DHCPREQUEST values compute to the same tps. Could
> one conclude that when attempting to compute dhcp tps, you only need to
> take DHCPDISCOVER 4 way handshakes into account?
I would say the only thing that matters is DHCPREQUESTs/s. Assuming
they all result in DHCPACKs. This is because the server must fsync()
the lease database before transmitting a DHCPOFFER.
In my own testing on one arbitrary system, I found that simply
profiling how many fsync()'s per second the system could accomplish
gave me a rough approximation (consistently 1/10th) of how many
DHCPREQUESTs the server appeared to be able to process per second.
Note that the hard drive in my laptop was able to do something like
4 DHCPREQUESTs/s. I suspect your DHCP server has a much better hard
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David W. Hankins "If you don't do it right the first time,
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Internet Systems Consortium, Inc. -- Jack T. Hankins
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