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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009>Hi Glenn</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009>We have used the -lf option to write the lease file to
the Ram disk . I wanted this to on the dhcpd.conf file
</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009>
I tried the option lease-file-name in my dhcpd.conf file to /dev/ramdisk
</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009>but it gets ignored while writing the lease. it is
written to default location /var/db/dhcpd.leases</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009>is there a way we can change this before compiling
.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=517034911-01042009>Gopinath </SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> LOGANATHAN GOPINATH-XNT436
<BR><B>Sent:</B> Thursday, February 26, 2009 7:55 PM<BR><B>To:</B>
'dhcp-users@lists.isc.org'<BR><B>Subject:</B> Re:
Ping-checkoff<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>
<P><SPAN class=998121614-26022009><FONT face=Arial size=2>Hi
all</FONT></SPAN></P>
<P><SPAN class=998121614-26022009><FONT face=Arial
size=2>
Thanks for your reply ,</FONT></SPAN></P>
<P><SPAN class=998121614-26022009><FONT face=Arial size=2>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</FONT></SPAN></P>
<P><SPAN class=998121614-26022009><FONT face=Arial
size=2> 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.</FONT></SPAN></P>
<P><SPAN class=998121614-26022009><FONT face=Arial
size=2>Cheers</FONT></SPAN></P>
<P><SPAN class=998121614-26022009><FONT face=Arial size=2>Gopinath
</FONT></SPAN></P>
<P><FONT face=Arial size=2></FONT> </P>
<P><FONT face=Arial size=2></FONT> </P>
<P><FONT face=Arial size=2></FONT> </P>
<P><FONT face=Arial size=2>Date: Wed, 25 Feb 2009 23:41:24 +1100
(EST)</FONT></P>
<P><FONT face=Arial size=2>From: Glenn Satchell
<Glenn.Satchell@uniq.com.au></FONT></P>
<P><FONT face=Arial size=2>Subject: Re: Ping-checkoff</FONT></P>
<P><FONT face=Arial size=2>To: dhcp-users@lists.isc.org</FONT></P>
<P><FONT face=Arial size=2>Message-ID:
<200902251241.n1PCfOvc013767@mail.uniq.com.au></FONT></P>
<P><FONT face=Arial size=2>Content-Type: TEXT/plain; charset=us-ascii</FONT></P>
<P><FONT face=Arial size=2></FONT> </P>
<P><FONT face=Arial size=2>>Date: Wed, 25 Feb 2009 11:39:43 +0100</FONT></P>
<P><FONT face=Arial size=2>>From: Christof Chen
<christof@chen.de></FONT></P>
<P><FONT face=Arial size=2>>To: Users of ISC DHCP
<dhcp-users@lists.isc.org></FONT></P>
<P><FONT face=Arial size=2>>Subject: Re: Ping-checkoff</FONT></P>
<P><FONT face=Arial size=2>>X-Enigmail-Version: 0.95.7</FONT></P>
<P><FONT face=Arial size=2>>X-Df-Sender: 285754</FONT></P>
<P><FONT face=Arial size=2>>X-BeenThere: dhcp-users@lists.isc.org</FONT></P>
<P><FONT face=Arial size=2>></FONT></P>
<P><FONT face=Arial size=2>>> Hi can some one help me disabling ping-check
off and moving the dhcp </FONT></P>
<P><FONT face=Arial size=2>>> leases write ram disk .Your help would be
highly appreciated</FONT></P>
<P><FONT face=Arial size=2>></FONT></P>
<P><FONT face=Arial size=2>>What about writing</FONT></P>
<P><FONT face=Arial size=2>></FONT></P>
<P><FONT face=Arial size=2>> ping-check false;</FONT></P>
<P><FONT face=Arial size=2>></FONT></P>
<P><FONT face=Arial size=2>>into your dhcpd.conf file?</FONT></P>
<P><FONT face=Arial size=2>></FONT></P>
<P><FONT face=Arial size=2>>The location of the lease file can be changed
either on compile time or </FONT></P>
<P><FONT face=Arial size=2>>(probably more convenient) as option -lf to the
dhcpd command.</FONT></P>
<P><FONT face=Arial size=2>></FONT></P>
<P><FONT face=Arial size=2>or even more convenient use dhcpd.conf
entry</FONT></P>
<P><FONT face=Arial size=2>The lease-file-name statement</FONT></P>
<P><FONT face=Arial size=2>lease-file-name name;</FONT></P>
<P><FONT face=Arial size=2>Name should be the name of the DHCP server's lease
file.</FONT></P>
<P><FONT face=Arial size=2>By default, this is /var/dhcp/dhcpd.leases. This
state-</FONT></P>
<P><FONT face=Arial size=2>ment must appear in the outer scope of the
configuration</FONT></P>
<P><FONT face=Arial size=2>file - if it appears in some other scope, it will
have no</FONT></P>
<P><FONT face=Arial size=2>effect.</FONT></P>
<P><FONT face=Arial size=2>lease-file
"/path/to/ramdisk/dhcpd.leases";</FONT></P>
<P><FONT face=Arial size=2>regards,</FONT></P>
<P><FONT face=Arial size=2>-glenn</FONT></P>
<P><FONT face=Arial size=2></FONT> </P></DIV></BODY></HTML>