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<p class="MsoNormal"><span style="font-size:11.0pt">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Is it possible to prevent lustre from using specific ports when establishing a socket connection?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We have the situation where lustre may use a port (1022) and then a service that needs to use that port fails to start.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Our current solution is a local patch to check the port values being iterated through in lnet/lnet/acceptor.c:lnet_connect() and to just skip over 1022.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Is there already a way to avoid certain ports for lustre? Either in lustre or via some kernel mechanism that would affect lustre?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We're considering making a more general patch that would allow specifying ports to avoid by adding a module parameter to lnet but aren't sure what a good design would be. So far, the basic idea is that the
user supplies a string of numbers/ranges such as "512,513-515,1022" and then a list or bitmap or some other data structure of ports to avoid is created and then lnet_connect() checks that data structure when selecting ports.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Gian-Carlo <o:p></o:p></span></p>
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