Re: remote triggered service failover

[nick garratt <nick-lvs@xxxxxxxxxxxxxx>]

ah, a guinea pig.

i've had a bit of experience with db failover with informix, which is 
quite sweet. costly too. in that case (also linux) the configuration 
was much simpler - just a pair of machines - and i got heartbeat to 
work well in this scenario. however, forcing hearbeat failure on a 
service failure to induce service failover seems a little clunky. in 
addition, service failure does not necessarily mean a machine failure 
and so there are situations where it is conceivable that heartbeat 
will happily operate while the services the machine supports may be 
unusable and local monitors can't be launched. for this reason an 
external monitor agent is the most reliable.
i'll gladly contribute any experience i might have to offer to your 
effort. hopefully the overall experience will be a good one :)
nick


> nick-lvs@xxxxxxxxxxxxxx wrote:
>
> >  there are two internal services which i'm reluctant to handle as
> >  internal virtual services  - mysql and msession.
> Failing over databases is something that Oracle charges a lot of money
> for. I don't have anything to say beyond the HOWTO. However I would be
> glad to put your experience (good, bad or otherwise) into the HOWTO
> after you've tried it out
>
> Joe
> --
> Joseph Mack PhD, Senior Systems Engineer, Lockheed Martin
> contractor to the National Environmental Supercomputer Center,
> mailto:mack.joseph@xxxxxxx ph# 919-541-0007, RTP, NC, USA
>
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