Other than KILL?
Kevin Darcy
kcd at daimlerchrysler.com
Tue May 16 19:36:49 UTC 2000
One common technique is to do a normal kill (-TERM) followed a few seconds
later by "hard" kill (-KILL). That way you give the daemon a chance to
terminate normally, but still "guarantee" the kill if it doesn't (actually even
a "hard" kill can fail if the process is executing a buggy/misbehaved kernel
call, but I've never seen an unkillable named).
One caveat: on a really, *REALLY* busy system, I suppose it's theoretically
possible that you might end up killing the wrong process with this technique
(if the PID's wrapped in those few seconds)....
- Kevin
Cinense, Mark wrote:
> The reason a -9 was put into the script, is because named would not shutdown
> all the time. So I guess that is why the last administrator put it in
> there. Is there any way of providing nameservice that produces .9995
> uptime. The customer wants to have nameservice with these stats 24x7. Is
> this possible?
>
> Mark A Cinense
>
> -----Original Message-----
> From: Barry Margolin [mailto:barmar at genuity.net]
> Sent: May 16, 2000 8:16 AM
> To: comp-protocols-dns-bind at moderators.isc.org
> Subject: Re: Other than KILL?
>
> In article
> <890B12B8398AD211BC6100805FA784A205383864 at es04snlnt.sandia.gov>,
> Cinense, Mark <macinen at sandia.gov> wrote:
> >Does anyone know of a signal to reset the named stats other
> than sending a
> >kill -9 to the PID. We would like to just reset stats
> instead of killing
> >the daemon. I looked into NDC, however I do not think our
> namservers are
> >setup to run NDC.
>
> I don't think there's any way to reset the stats other than
> restarting
> named. Why do you think kill -9 is the only way to restart
> named? A
> normal kill (without -9) is the right way to kill most
> daemons; -9 should
> only be a last resort if the process won't go away with a
> normal kill.
>
> --
> Barry Margolin, barmar at genuity.net
> Genuity, Burlington, MA
> *** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them
> to newsgroups.
> Please DON'T copy followups to me -- I'll assume it wasn't
> posted to the group.
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