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<p class="MsoNormal">Hi,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I am performing load test of ISC – DHCP.</p>
<p class="MsoNormal">The DHCP server is handling only 30TPS till now.</p>
<p class="MsoNormal">I am using following dhcperf command :-</p>
<p class="MsoNormal">dhcperf --server x.x.x.x --discover --retain-leases --test-load 50 --test-duration 60</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I have ran series of tests as follows :-</p>
<p class="MsoNormal"> </p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="232" style="width:174.25pt; margin-left:-.75pt; border-collapse:collapse">
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<p class="MsoNormal"><b><span style="color:black">tx/sec (TPS)</span></b><b><span style="color:black"></span></b></p>
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<p class="MsoNormal"><b><span style="color:black">Duration (sec)</span></b><b><span style="color:black"></span></b></p>
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<p class="MsoNormal"><b><span style="color:black">Success Rate (%)</span></b><b><span style="color:black"></span></b></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">100</span><span style="color:black"></span></p>
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<td width="70" nowrap="" valign="bottom" style="width:52.25pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">60</span><span style="color:black"></span></p>
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<td width="103" nowrap="" valign="bottom" style="width:77.3pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">11.7</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">100</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">60</span><span style="color:black"></span></p>
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<td width="103" nowrap="" valign="bottom" style="width:77.3pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">12</span><span style="color:black"></span></p>
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<tr style="height:13.55pt">
<td width="60" nowrap="" valign="bottom" style="width:44.7pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">50</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">300</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">36.7</span><span style="color:black"></span></p>
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<td width="60" nowrap="" valign="bottom" style="width:44.7pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">30</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">300</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">97.5</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">30</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">150</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">99.8</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">30</span><span style="color:black"></span></p>
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<td width="70" nowrap="" valign="bottom" style="width:52.25pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">600</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">96.4</span><span style="color:black"></span></p>
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<td width="60" nowrap="" valign="bottom" style="width:44.7pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">30</span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">60</span></p>
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<td width="103" nowrap="" valign="bottom" style="width:77.3pt; border-top:none; border-left:none; border-bottom:solid windowtext 1.0pt; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:13.55pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">100</span></p>
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<p class="MsoNormal"><span style="color:black">2 clients – 30TPS each</span><span style="color:black"></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="color:black">60</span><span style="color:black"></span></p>
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<p class="MsoNormal"><span style="color:black">40% each</span><span style="color:black"></span></p>
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<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The above table implies that when there is one perf client sending 30 TPS, servers handles perfectly.</p>
<p class="MsoNormal">But, when I increase TPS or add one more perf client with 30 TPS, the server performance degrades.
</p>
<p class="MsoNormal">This concludes that the DHCP server can handle only 30 TPS. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Can you please share your experiences on load test with dhcperf , if you are getting more TPS than this.</p>
<p class="MsoNormal">Also let me know if I can do any kind of optimization to achieve more TPS.</p>
<p class="MsoNormal">I have defined only one pool in the dhcpd.conf & I don’t see there is any other configuration available regarding load testing.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks,</p>
<p class="MsoNormal">Amit</p>
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