Hi All,
I was just cleaning out my in-box from this list and stumbled across the
post (below) from July 10 that talks about apmd shutting down a network
interface and causing problems. This got me to thinking - yeah, dangerous,
I know! -smile-
I've got a large number of RedHat systems we use as servers for various
purposes but I know that a large number of them aren't used most of the
time - they just sit there burning electricity. We need them to be
available 24/7, so we don't want to shut them down but heretofore we've
always left apmd off. The events for which they need to perform work are
always based upon network packets headed their way... If we could tolerate
the delay of a "wake", is there any power advantage - or perhaps disk
longevity advantage - to using apmd? Would the systems even notice the
network packets if they were in sleep mode? ...Given the cost of power
in California these days, not to mention just reducing waste in general...
Your thoughts, please.
Thanks,
Richard
--
Richard Troy, Chief Scientist
Science Tools Corporation
[EMAIL PROTECTED], 510-567-9957, http://ScienceTools.com/
On Wed, 10 Jul 2002, Rex Dieter wrote:
> Date: Wed, 10 Jul 2002 11:09:56 -0500 (CDT)
> From: Rex Dieter <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: Re: Ethernet interface shuts downB
>
> On Wed, 10 Jul 2002 [EMAIL PROTECTED] wrote:
>
> > From: nitin panjwani <[EMAIL PROTECTED]>
> > Subject: Ethernet interface shuts down
> > To: [EMAIL PROTECTED], [EMAIL PROTECTED]
> >
> > Hi All,
> >
> > I have three Linux boxes running RH7.2 and each one of
> > these has two 3com Ethernet NICs. I am trying to do
> > some routing stuff with these.
> >
> > Ethernet interfaces on these boxes shut down by its
> > own if I do not pass the packet through them for a
> > while. I am not able to understand why is it
> > happening.
>
> It's a "feature" of apmd. In particular, look at
> /etc/sysconfig/apmd
> and modify the line labeled: NET_RESTART
>
> In short, when your machine goes into suspend mode, the machine
> (when NET_RESTART=yes, the default), will shutdown network interfaces, and
> then presumably restart them when the machine "wakes up". I've had
> nothing but troubles with it personally, so I always set NET_RESTART=no
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