[ntp:questions] .1 Microsecond Synchronization

Todd Glassey CISM CIFI tglassey at earthlink.net
Wed Jun 17 15:59:08 UTC 2009


Patrick Klos wrote:
> In article <2PmdnYgdgrSWZbrXnZ2dnUVZ_uidnZ2d at giganews.com>,
> ScottyG  <scottg at pepex.net> wrote:
>   
>> Hello.
>>
>> The company I am working for needs to be able to record timestamps in a trading 
>> system logs down to a .1 microsecond accuracy.
>>
>> We will have servers located in London, New York and Chicago. There will be a 
>> dedicated resilient link between London and New York.
>>     
>
> What OS(es) are these servers running?  There are very few (if any) ways for
> an "application" to query a piece of hardware (driver) in near the .1 usecond
> timeframe.  And depending on the OS (Windows), you can't be guaranteed to do 
> anything in that timeframe.
>
>   
>> Searches on the web have made claims that NTP can achieve this accuracy. 
>> Unfortunately the sales rep for the NTP server we looked at told me that the best I 
>> could expect is 2-5 ms synchronization across servers.
>>
>> Has anyone had any experience doing this? Can anyone suggest how to achieve 
>> this accuracy?
>>     
>
> How do you record receipt of your "trades"?  
Is this for OATS 6953 compliance or what? is this ATD or TRACE based 
trading? - they are all different.
> They probably arrive in your
> server(s) via a network connection or dedicated communications link?  Just 
> the processing of the communcations could take longer than .1 useconds.
>
>   
>> We do have some budget but this but if I need to spend a whole lot on this I need 
>> to get in front of my management with the reasons. 
>>     
>
> As others have pointed out, you first need to come up with a practical set
> of requirements.  Ask your people where they came up with this .1us number
> and what they think that will solve?  
>
> ========= For LAN/WAN Protocol Analysis, check out PacketView Pro! =========
>     Patrick Klos                           Email: patrick at klos.com
>     Klos Technologies, Inc.                Web:   http://www.klos.com/
> ============================================================================
>
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