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
"-Original Message-
From: Dan Snyder [mailto:sliple...@gmail.com]
Sent: Mon 8/24/2009 2:00 PM
To: NANOG list
Subject: [SPAM-HEADER] - Data Center testing - Email has different SMTP TO: and
MIME TO: fields in the email addresses
Does any one know of any data centers that do fa
Does any one know of any data centers that do failure testing of their
networking equipment
regularly? I mean to verify that everything fails over properly after
changes have been made over
time. Is there any best practice guides for doing this?
Thanks,
Dan
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