Glenn.Satchell at uniq.com.au
Wed Apr 1 15:13:23 UTC 2009
For dhcpd 3.x you can edit site.conf, you need the entry for VARDB and
the CC line. Then run ./configure to build the Makefile.
# Put local site configuration stuff here to override the default
# settings in Makefile.conf
VARDB = /var/dhcp
CC = gcc -O -D_PATH_DHCPD_DB=\"/dev/ramdisk\"
for dhcp-4.x there is an
the lease-file-name statement needs to be one of the first few lines in
dhcpd.conf if you use that method.
>Date: Wed, 1 Apr 2009 19:52:18 +0800
>From: "LOGANATHAN GOPINATH-XNT436" <gopinathloganathan at motorola.com>
> Hi Glenn
> We have used the -lf option to write the lease file to the Ram disk . I
> wanted this to on the dhcpd.conf file
> I tried the option lease-file-name in my dhcpd.conf file to
> but it gets ignored while writing the lease. it is written to default
> location /var/db/dhcpd.leases
> is there a way we can change this before compiling .
> From: LOGANATHAN GOPINATH-XNT436
> Sent: Thursday, February 26, 2009 7:55 PM
> To: 'dhcp-users at lists.isc.org'
> Subject: Re: Ping-checkoff
> Hi all
> Thanks for your reply ,
> I tried a couple of tests , Firstly adding ping-check false into my
> dhcpd.conf and mounted the dhcp on /dev/ramdisk .I measured the
> performance of the server using dhcperf. To my surprise the number of
> leases i.e High water mark went to a whopping number of 8090 and i was
> able to get around 2300 five handshakes successfully. The subnet which i
> used was 10.1.1.0-10.1.1.254 so dhcp wrote a lease of 251 numbers
> When i increased the host numbers to 10.1.0.0-10.1.255.254
> roughy 65000 hosts the numbers came down drastically to 92 transactions
> per second from 8090. dhcpd wrote a lease file of ~3500 leases. I wonder
> what could cause such a huge drop in numbers . Has anyone tried this or
> faced a similar problem.
> Date: Wed, 25 Feb 2009 23:41:24 +1100 (EST)
> From: Glenn Satchell <Glenn.Satchell at uniq.com.au>
> Subject: Re: Ping-checkoff
> To: dhcp-users at lists.isc.org
> Message-ID: <200902251241.n1PCfOvc013767 at mail.uniq.com.au>
> Content-Type: TEXT/plain; charset=us-ascii
> >Date: Wed, 25 Feb 2009 11:39:43 +0100
> >From: Christof Chen <christof at chen.de>
> >To: Users of ISC DHCP <dhcp-users at lists.isc.org>
> >Subject: Re: Ping-checkoff
> >X-Enigmail-Version: 0.95.7
> >X-Df-Sender: 285754
> >X-BeenThere: dhcp-users at lists.isc.org
> >> Hi can some one help me disabling ping-check off and moving the dhcp
> >> leases write ram disk .Your help would be highly appreciated
> >What about writing
> > ping-check false;
> >into your dhcpd.conf file?
> >The location of the lease file can be changed either on compile time or
> >(probably more convenient) as option -lf to the dhcpd command.
> or even more convenient use dhcpd.conf entry
> The lease-file-name statement
> lease-file-name name;
> Name should be the name of the DHCP server's lease file.
> By default, this is /var/dhcp/dhcpd.leases. This state-
> ment must appear in the outer scope of the configuration
> file - if it appears in some other scope, it will have no
> lease-file "/path/to/ramdisk/dhcpd.leases";
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