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I think the wake up depends on how the node enter the sleeping state.<br>
May be you could try this with the original kernel of Beowulf 27bz-7<br>
power down remotely a node:<br>
bpctl -S Node_Number -s pwroff<br>
<br>
The node shutdown and the power off but the NIC is alive<br>
Don't remove the power plug. (Important)<br>
<br>
send the magic packet
<pre wrap="">ether-wake -i eth4 00:E0:81:03:21:DD</pre>
It should wake up the node<br>
If not add the kernel parameter <br>
apm=power-off<br>
to the slave node kernel<br>
<br>
And restart the whole process.<br>
<br>
This works fine for me (but It's not the same motherboard)<br>
I hope this could help<br>
Claude<br>
<br>
<br>
<br>
<br>
Martin Siegert wrote:<br>
<blockquote type="cite" cite="mid:20010907122048.A31459@stikine.ucs.sfu.ca">
<pre wrap="">I am trying to get wake-on-lan (WOL) to wirk on my Beowulf cluster<br>and until now I failed. Admittedly I don't know much about WOL, thus<br>this failure may just be due to some stupid mistake on my part.<br><br>Here is the problem: Each node draws a current of about 1.5A (I measured<br>that a few days ago). Since I have about 70 of those, booting all nodes<br>at once will draw all of the sudden a current of more than 100A. The<br>people who run our machine room don't allow me to do that (probably for<br>good reason). Thus I decided on the following approach:<br><br>The bios for the motherboard that I'm using (Tyan Thunder K7) allows<br>two setting for what to do after a power failure when the power comes<br>back on: a) stay off or b) power on.<br>Instead of choosing b) for all nodes (wich would cause the aforementioned<br>problem) I want to choose b) only for the master node and a) for all slaves.<br>Then use WOL from the master node to wake up the slave seq
uentially<br>using a script and the ether-wake program from<br><a class="moz-txt-link-freetext" href="http://www.scyld.com/expert/wake-on-lan.html">http://www.scyld.com/expert/wake-on-lan.html</a>.<br><br>Unfortunately, I have been unable to wake up a node. Here is what I do:<br>"halt" a node. Detach the power cable. Reattach the power cable.<br>At this point the lights on the two onboard NICs (the Tyan web site<br>and the printing on the chips say that those are 3c920, the 3c59x driver<br>identifies them as 3c980; I don't know whether that is relevant; the NICs<br>work fine) come on. A Tyan technician told me that WOL on the Thunder K7 is<br>always on, no special BIOS setup would be needed. They also told me that I<br>have to use a 2.4.x kernel because only those would support APCI. I don't<br>understand why the kernel is important here: when the node is halted<br>what difference does the kernel make for the receiving of the magic WOL<br>packet that is supposed to wake up th
e box? Anyway, I compiled a<br>2.4.9-ac8 kernel with APIC enabled, which I use with the "noapic"<br>kernel option in /etc/lilo.conf. I have also tried the stock RH 7.1<br>2.4.3-12smp kernel without any difference with respect to WOL (i.e.,<br>no success).<br><br>After reattaching the power cable I then send the magic packet from<br>the master node:<br><br>./ether-wake -i eth4 00:E0:81:03:21:DD<br><br>where 00:E0:81:03:21:DD is the MAC address of one of the onboard NICs<br>on the node. tcpdump shows that the packet actually is sent. Also the<br>lights in the NICs on the sending and receiving end flash, but otherwise<br>nothing happens.<br><br>What's wrong? Any suggestions are most appreciated.<br><br>Thanks!<br><br>Martin<br><br>========================================================================<br>Martin Siegert<br>Academic Computing Services phone: (604) 291-4691<br>Simon Fraser University fax: (604) 291-4242<br>Burnab
y, British Columbia email: <a class="moz-txt-link-abbreviated" href="mailto:siegert@sfu.ca">siegert@sfu.ca</a><br>Canada V5A 1S6<br>========================================================================<br><br>_______________________________________________<br>Beowulf mailing list, <a class="moz-txt-link-abbreviated" href="mailto:Beowulf@beowulf.org">Beowulf@beowulf.org</a><br>To change your subscription (digest mode or unsubscribe) visit <a class="moz-txt-link-freetext" href="http://www.beowulf.org/mailman/listinfo/beowulf">http://www.beowulf.org/mailman/listinfo/beowulf</a><br><br></pre>
</blockquote>
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<td nosave="">Claude Pignol</td>
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SeismicCity, Inc.</a>
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<td align="Center" nosave=""> Houston TX 77042</td>
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<td>Phone:832 251 1471 Mob:281 703 2933</td>
<td align="Center" nosave=""> Fax:832 251 0586</td>
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