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Re: [linux-lvm] has anyone used LVM in a HA cluster?



which may backfire, if both nodes think the other one is down (split
brain again) and start the shutdown procedure. okay, this is a very rare
situation, and may happen only under strange load and scheduling
parameters, but it will happen as any other "very rare situation" happens
;-). especially in HA environments they seem to happen much more often
then in simple single point of failure environments ;-) you won'Ät loosew
your filesystem, but the service is unavailable.

Nothing will give you 100%: eventually the switchover methods introduce more marginal P(fail) than the original setup had. Joy of reliability studies is figuring how to take the first partial of P(Fail) w/ respect to the switchover systems and set it to zero... Turns out the most reliable answer is a swag anyway :-)

--
Steven Lembark                               2930 W. Palmer
Workhorse Computing                       Chicago, IL 60647
                                           +1 800 762 1582



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