On Wed, Aug 26, 2009 at 03:32:42PM +, Dylan Ebner wrote:
> I always love it when I get an outage report from my ISP's or datacenter
> and they say an "unexpected issue" or "unforseen issue" caused the
> problem.
Well, at least it's better than "yeah, we knew about it, but didn't think it
was w
On Aug 24, 2009, at 9:38 AM, Dan Snyder wrote:
We have done power tests before and had no problem. I guess I am
looking
for someone who does testing of the network equipment outside of
just power
tests. We had an outage due to a configuration mistake that became
apparent
when a switch f
On Tue, Aug 25, 2009 at 12:53:10PM +, Jeff Aitken wrote:
> you have to have some way of describing the desired state of the network in
> machine-parsable format
Any suggested tools for describing the desired state of the network?
NDL, the only option I'm familiar with, is just a brute-force a
On Tue, Aug 25, 2009 at 10:45:07PM -0500, Frank Bulk - iName.com wrote:
> There's more to data integrity in a data center (well, anything powered,
> that is) than network configurations.
Understood and agreed. My point was that induced failure testing isn't
the right way to catch incorrect or u
ven a nanosecond when the state-of-the-art
says something very different indeed.
Deepak Jain
AiNET
> -Original Message-
> From: Dylan Ebner [mailto:dylan.eb...@crlmed.com]
> Sent: Wednesday, August 26, 2009 11:33 AM
> To: Dan Snyder; Ken Gilmour
> Cc: NANOG list
> Subject
ve it when I
get an outage report from my ISP's or datacenter and they say an "unexpected
issue" or "unforseen issue" caused the problem.
Dylan
-Original Message-
From: Dan Snyder [mailto:sliple...@gmail.com]
Sent: Monday, August 24, 2009 8:39 AM
To: Ken Gilmour
Cc
James Hess wrote:
Config checking can't say much about silent hardware failures.
Unanticipated problems are likely to arise in failover systems,
especially complicated ones. A failover system that has not been
periodically verified may not work as designed.
I've seen 3-4 failover failures in
Most Provider type datacenters I've worked with get a lot of flak from
customers when they announce they're doing network failover testing, because
there's always going to be a certain amount of chance (at least) of
disruption. Its the exception to find a provider that does it I think (or
maybe jus
On Tue, Aug 25, 2009 at 7:53 AM, Jeff Aitken wrote:
>[..] Periodically inducing failures to catch [...] them is sorta like using
>your smoke detector as an oven timer.
>[..]
> machine-parsable format, but the benefit is that you know in pseudo-realtime
> when something is wrong, as opposed to find
ch.
Frank
-Original Message-
From: Jeff Aitken [mailto:jait...@aitken.com]
Sent: Tuesday, August 25, 2009 7:53 AM
To: Dan Snyder
Cc: NANOG list
Subject: Re: Data Center testing
On Mon, Aug 24, 2009 at 09:38:38AM -0400, Dan Snyder wrote:
> We have done power tests before and had no pr
On Mon, Aug 24, 2009 at 09:38:38AM -0400, Dan Snyder wrote:
> We have done power tests before and had no problem. I guess I am looking
> for someone who does testing of the network equipment outside of just power
> tests. We had an outage due to a configuration mistake that became apparent
> when
> At least once a year I like to go out and kick the service entrance
> breaker to give the whole enchilada an honest to $diety plugs out test.
> As you said, not recommenced if you don't maintain stuff, but that's
> how
> confident I feel that my system works.
Nature has a way of testing it, even
Deepak Jain wrote:
> Thanks for the kind words Ken.
>
> Power failure testing and network testing are very different disciplines.
>
> We operate from the point of view that if a failure occurs because we have
> scheduled testing, it is far better since we have the resources on-site to
> addres
Thanks for the kind words Ken.
Power failure testing and network testing are very different disciplines.
We operate from the point of view that if a failure occurs because we have
scheduled testing, it is far better since we have the resources on-site to
address it (as opposed to an unplanned
Dan Snyder wrote:
We have done power tests before and had no problem. I guess I am looking
for someone who does testing of the network equipment outside of just power
tests. We had an outage due to a configuration mistake that became apparent
when a switch failed. It didn't cause a problem how
We have done power tests before and had no problem. I guess I am looking
for someone who does testing of the network equipment outside of just power
tests. We had an outage due to a configuration mistake that became apparent
when a switch failed. It didn't cause a problem however when we did a p
I know Peer1 in vancouver reguarly send out notifications of
"non-impacting" generator load testing, like monthly. Also InterXion
in Dublin, Ireland have occasionally sent me notification that there
was a power outage of less than a minute however their backup
successfully took the load.
I only re
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