Perry E. Metzger wrote:
Here is how you can turn them on: http://en.wikipedia.org/wiki/Wake_on_lan There is even open source software described on that page.
Wake-on-Lan works very well - when it works. We were using it quite successfully on a small cluster we built for remote power on (after remote power off). We had to upgrade the BIOS recently for an AMD erratum and the BIOS upgrade had the unfortunate side-effect of mangling WOL while fixing the processor problem.
We can reset the WOL flags and re-enable it on individual nodes, but unfortunately when the nodes are power-cycled, the WOL flag goes back to its default (off) state. Given the typical use case of WOL, it seems unfortunate that a power cycle resets it.
We've made a stab at raising the matter with the vendor but since the cluster in question is only 20 nodes I don't think they take us seriously (or at least not as seriously as you folks with hundreds of nodes). So YMMV.
-stephen -- Stephen Mulcahy, Applepie Solutions Ltd., Innovation in Business Center, GMIT, Dublin Rd, Galway, Ireland. +353.91.751262 http://www.aplpi.com Registered in Ireland, no. 289353 (5 Woodlands Avenue, Renmore, Galway) _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
