On 01/22/2013 08:26 PM, Alex Sudakar wrote: > Hello Digimer, > >> The "device" you are thinking of is probably "quorum disk", or "qdisk". >> In the early days of red hat clustering, this was required. Then it >> became optional and now it's falling out of favour. It's still usable >> though and you can use it with pacemaker by adding cman. > > Okay, that helps put things in perspective, thanks. I won't bother > pressing on with exploring 'qdisk'. > >> What you really need though is stonith, also known as fencing. In a two >> node cluster, if there is a break between the nodes, they'll reach out >> over another network channel and the faster one will power off the >> slower one. This is needed anyway, for safety reasons (prevents >> "split-brains") and it's an effective tie-breaker. > > If there's one thing I'm learning - about Linux clustering, and in > this group - it's about the importance of stonith! :-) > > Thanks for your help!
I'm glad to hear that. A cluster without stonith is a car without seatbelts. :) Also, please always reply to the mailing list. These messages help others in the future by being in the archives. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
