[ClusterLabs] Antw: [EXT] staggered resource start/stop

[Ulrich Windl]

>>> d tbsky <tbskyd at gmail.com> schrieb am 29.03.2021 um 04:01 in Nachricht
<CAC6SzHLi0ufVhE3RM57e2V=t_mOmL5ECX8AY3gtcfGmOfKDaxg at mail.gmail.com>:
> Hi:
>    since the vm start/stop at once will consume disk IO, I want to
> start/stop the vm
> one‑by‑one with delay.

I'm surprised that in these days of fast disks and SSDs this is still an
issue.
Maybe don't delay the start, but limit concurrent starts.
Or maybe add some weak ordering between the VMs.

> 
>     search the email‑list I found the discussion
> https://oss.clusterlabs.org/pipermail/pacemaker/2013‑August/043128.html 
> 
>     now I am testing rhel8 with pacemaker 2.0.4. I wonder if there are
> new methods to solve the problem. I search the document but didn't
> find new parameters for the job.
> 
>     if possible I don't want to modify VirtualDomain RA which comes
> with standard rpm package. maybe I should write a new RA which stagger
> the node utilization. but if I reset the node utilization when cluster
> restart, there maybe a race condition.
> 
>      thanks for help!
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