On 2009-01-20T17:21:39, Adrian Chapela <achapela.rexist...@gmail.com> wrote:
> It is accessed over lan, you need a server with "IPMI over LAN" like > Integrated Lights-Out from HP, most known as iLo ( > http://h18013.www1.hp.com/products/servers/management/ilo/ ). iLo has a > network port that you can use to control a server remotely. > > I think a good way (if the server are near...) could be use a cross-over > ethernet wire. Cross-over of course doesn't work for more than 2 nodes ;-) Usually, having the IPMI device on one of the cluster LANs suffices. You need two failures for the cluster to freeze then: the IPMI LAN going down, _and_ a node failure/additional network failure. As the HA cluster tends to only protect against single failures (it is usually very possible to construct a scenario of two failures which bring down the entire cluster), that guarantee still holds. It's all a question of paranoia of course, but k-fault-tolerance for k > 1 is really quite difficult in the general case, even though special cases (ie, a 5 node cluster can tolerate 2 node failures) is possible. Regards, Lars -- Teamlead Kernel, SuSE Labs, Research and Development SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wilde _______________________________________________ Pacemaker mailing list Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker
