[ntp:questions] .1 Microsecond Synchronization

John Hasler john at dhh.gt.org
Thu Jun 4 21:38:37 UTC 2009

ScottyG writes:
> To do this the order in which market data was received and trades
> transmitted need to be maintained. I do know from their current log files
> that 1 ms is not fine enough for this and that on occasion .1 ms is not
> good enough.

Eventually 100ns won't be good enough, and then 10ns, and then 1ns, and
then 1 planck time.  You need some way other than time to order trades that
get the same timestamp.  How about sorting them by their hash value?

What did they do before they had any computers at all?
John Hasler 
john at dhh.gt.org
Dancing Horse Hill
Elmwood, WI USA

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