RE: [Myexperiment-discuss] myExperiment wiki is down....

[David De Roure]

Thanks everyone. An excellent example of Leslie Lamport's famous definition of 
a distributed system: "A distributed system is one in which the failure of a 
computer you didn't even know existed can render your own computer unusable." 
:-)

-- Dave

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Don Cruickshank
Sent: 29 August 2009 00:33
To: 'David R Newman'; 'Lucy Bridges'; 'Alan Williams'
Cc: 'MyExperiment Discussion'
Subject: RE: [Myexperiment-discuss] myExperiment wiki is down....

I've made the temporary change.  How soon this affects people over parts the
internet is, as usual, anyone's guess!

Cheers,
Don.

-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of David R Newman
Sent: 28 August 2009 17:31
To: Lucy Bridges; Alan Williams
Cc: MyExperiment Discussion
Subject: Re: [Myexperiment-discuss] myExperiment wiki is down....

Hi All,

Southampton has a peering arrangement with Bradford Uni for some reason they
are not mapping the ecs.soton.ac.uk domain tree.  I believe that our systems
team is now aware of this and I will ask them for an ETA on it being fixed.
In the mean time Don said he will change the domain record for myexperiment
so it uses IP addresses instead.

Regards

David Newman

--On Friday, August 28, 2009 16:43:22 +0100 Lucy Bridges
<address@hidden> wrote:

> Alan Williams wrote:
>> Sean Bechhofer wrote:
>>> If we haven't already done so, we should report this to our systems 
>>> administration as it may be a symptom of some other problem.
>>
>> I've reported it to our dutyoffice.  I've had wiki.myexperiment.org 
>> disappearing and then reappearing so quickly that my ping script 
>> didn't detect it :-(
>>
>> I can manually ping it and it is not there.  Then a few pings (often 
>> just one) later it reappears.  My guess is that we must have multiple 
>> DNS servers and at least one of them is corrupt.  That's just my 
>> guess though.
>
> A check on http://www.squish.net/dnscheck/dnscheck.cgi returns:
>
> 25.0% of queries will end in failure at 143.53.238.4 (dns0.brad.ac.uk) 
> - returned SERVFAIL code
>
> 25.0% of queries will end in failure at 143.53.238.5 (dns1.brad.ac.uk) 
> - returned SERVFAIL code
>
> 25.0% of queries will be returned by 152.78.128.78 (dns0.soton.ac.uk)
> websites1.ecs.soton.ac.uk.    1800    IN      A       152.78.189.43
>
> 25.0% of queries will be returned by 152.78.128.79 (dns1.soton.ac.uk)
> websites1.ecs.soton.ac.uk.    1800    IN      A       152.78.189.43
>
>
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