[Linux-cluster] power controller is interal/loss of pwer prevents failover: any ideas

Rick Rodgers rodgersr at yahoo.com
Mon Sep 11 06:19:12 UTC 2006

Yes that is what my point is. These systems use the same power cord
 for the powercontroller and system power. If you pull the plug then no failover
 can happen because the backup node can not shoot the active node because
 it can not talk to the active nodes power controller. This means a pull of the plug and
 no failover. Seem like we really should havea way to failover.

----- Original Message ----
From: Ken Johnson <busyadmin at gmail.com>
To: linux clustering <linux-cluster at redhat.com>
Sent: Sunday, September 10, 2006 9:42:16 PM
Subject: Re: [Linux-cluster] power controller is interal/loss of pwer prevents failover: any ideas

On Sun, 10 Sep 2006 at 21:14 -0700, Rick Rodgers wrote:
> Yes I was, but if the power controller is down (unreachable)
>  and the system (node)  is hung how can these fence anything?
>  By pulling the plug you loose both and you can not be sure of anything
>  since you can not successfully issue a power cycle command.

I'm not sure I understand what you mean by "if the power controller is
down". These systems can be configured with redundant power supplies
and if both power supplies fail then there's not anything you can do
to fence a system.

>  Thanks for your input though.

sure, np

- Ken

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