tuning for maximum dhcp performance

Dan dan at telcohero.com
Fri Apr 25 18:47:02 UTC 2008

My original post comments on the performance gains of a ramdrive, but I'd 
be much more likely to just remove the per-lease fsync and keep it on the 
generator-backed, ups-backed, battery-backed raid10 which gives me almost 
the same performance, but without as much exposure:

  80 clients/sec - raid10
420 clients/sec - raid10 no fsync
480 clients/sec - ramdisk

Rsycning a fairly large dhcpd.leases periodically leaves a lot of room for 
lost information.

I would still prefer keeping the fsync, although I'd be curious to know 
how many people are running systems without the fsync or on a ramdrive.

On Fri, 25 Apr 2008, Brian Raaen wrote:

> Dear Dan,
> 	As far as the filesystem goes, for the ultimate in performance you might want
> to mount /etc/dhcpd (or wherever your leases file is) to a partition in your
> RAM.  Your could rsync this folder every few minutes/hours to back it up
> depending on your needs.  That would keep you from being harddrive bound.

More information about the dhcp-users mailing list