beekhof at gmail
Jul 3, 2008, 2:18 AM
Post #2 of 2
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Re: Delaying HA V2 resources not to start up at the same time
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On Wed, Jul 2, 2008 at 09:47, Ivan <hunvagyok[at]freemail.hu> wrote:
> Hi,
>
> I haven several heavily loaded Xen resources in a 2 node V2 cluster,
> they all depend on the same evms resource.
>
> I would like to implement some kind of delaying to save the hard time
> from the dom0 host starting them up at the same time.
>
> There's a start_delay and stop_delay parameters. I assume that because
> they all depend on the same resource (evms) the counter would start for
> all at the same time so it should be like this:
>
> vm1 start_delay=0
> vm2 start_delay=20
> vm3 start_delay=30
> vm4 start_delay=40
>
> vm1 stop_delay=40
> vm2 stop_delay=30
> vm3 stop_delay=10
> vm4 stop_delay=0
>
> And also I assume that HA adds these delay values to timeout values.
> What I mean is that if my vm4 has 60sec stop timeout and have 40 stop
> delay it will not consider the resource failed after 20 seconds right?
>
> Is that correct?
i dont know anything about stop_delay, but if you specify the
start_delay for the operation
ie. <op name=start interval=0 timeout=60s start_delay=40s/> , and/or
<op name=stop interval=0 timeout=60s start_delay=40s/>
then everything will work as you expect (the 40s is automagically
added to the 60s timeout)
> Would these delays be considered by HA when it comes to migration?
No, you need to specify it for every operation you want to delay the
execution of.
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