[gpfsug-discuss] NTP leap-second can take out GPFS server - it just has

[Barry Evans]

I've had a few (this is growing number as the day goes on) number of customers with IBM Storage Manager eating loads of CPU cycles and causing slow downs as a result (SLES 10 SP1, mostly). 

The common factor, at least at this end, seems to be ntp sycning against public ntp pool servers and Java, but Jez's report...... scary stuff...

Cheers,
Barry



On 2 Jul 2012, at 14:12, Orlando Richards wrote:

> Hi Jez,
> 
> We've had a few issues with the leap second - but so far it has been isolated to redhat 6.2 systems.
> 
> What OS are you running on your affected server?
> 
> Cheers,
> Orlando.
> 
> 
> On 02/07/12 14:03, Jez Tucker wrote:
>> Just had a lovely one.
>> 
>> As I’m, sure all of you are aware by now, there’s been much fun with
>> some of the NTP Stratum 1 servers not correctly accounting for the
>> leap-seocnd last night.
>> 
>> http://www.dailymail.co.uk/news/article-2167588/Leap-second-2012-Websites-crash-time-hiccup-caused-online-chaos.html?ito=feeds-newsxml
>> 
>> http://www.telegraph.co.uk/technology/news/9369671/Leap-second-brings-down-top-websites.html
>> 
>> You may wish to turn off ntp on your servers and correct your NTP to
>> trusted servers.
>> 
>> A clock skew from ntp.pool.org just took out one of our servers and the
>> node was expelled from the cluster.
>> 
>> Jez
>> 
>> ---
>> 
>> Jez Tucker
>> 
>> Senior Sysadmin
>> 
>> Rushes
>> 
>> DDI: +44 (0) 207 851 6276
>> 
>> http://www.rushes.co.uk <http://www.rushes.co.uk/>
>> 
>> 
>> 
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> 
> 
> -- 
>            --
>   Dr Orlando Richards
>  Information Services
> IT Infrastructure Division
>       Unix Section
>    Tel: 0131 650 4994
> 
> The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
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