The best time-sync method.....

[Alberto Brivio]

Dear All,


in stocks exchange / trading environment the correct time is mandatory for
each type of transaction so I would like to know what is the best way to
syncronize each system (win2000/xp) to a reliable external time source.


Regards

Alberto Brivio

 

[Richard Urban]

"Windows XP, as loaded, automatically updates the system time every 7 days
from one of two (default) time servers. This update interval can be changed
as follows:

Using regedit, search for "specialpollinterval" without the quotes.

You will see that the decimal value is 604800, the number of seconds in 7
days.

Edit this decimal value to any value you desire, remembering that there are
86400 seconds in one day, 3600 seconds in one hour.

Do this for each instance of the decimal value "specialpollinterval".

Reboot system.

Cheers!!!"


--
Regards:

Richard Urban

aka Crusty (-: Old B@stard

 

[Alex Nichol]

in stocks exchange / trading environment the correct time is mandatory for
each type of transaction so I would like to know what is the best way to
syncronize each system (win2000/xp) to a reliable external time source.

In XP use Control Panel - Date and time - Internet time page and set up
to have it automatically synced at regular intervals. The time.nist.gov
is probably better than time.windows.com time - there are also several
other government time providers: I use time-a.nist.gov or there is
time-b.timefreq.bldrdoc.gov (or time-c) or tock.usno.navy.mil

Then run regedit.exe and change the update interval (say to daily) - at
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\
W32Time\Time Providers\NtpClient
d-click on SpecialPollInterval in the right pane and enter desired
interval in seconds.

This will then note the extent of adjustment needed each time, and
adjust the calibration of the interval between timer interrupts until
the clock runs accurately even without resetting

 

[G.Beat]

In XP use Control Panel - Date and time - Internet time page and set up
to have it automatically synced at regular intervals. The time.nist.gov
is probably better than time.windows.com time - there are also several
other government time providers: I use time-a.nist.gov or there is
time-b.timefreq.bldrdoc.gov (or time-c) or tock.usno.navy.mil

Then run regedit.exe and change the update interval (say to daily) - at
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\
W32Time\Time Providers\NtpClient
d-click on SpecialPollInterval in the right pane and enter desired
interval in seconds.

This will then note the extent of adjustment needed each time, and
adjust the calibration of the interval between timer interrupts until
the clock runs accurately even without resetting

Alberto -

I work and consult in the financial industry and have worked on similar
issues in 2000 with the Eurex and CBOT exchanges.

You may desire a local NNTP (time server) on your local area network for
your application OR
add a GPS timing receiver to one of your MS Servers and have it operate as
the time server for your LAN.
http://www.cnssys.com/ rather than an Internet based time server.

IF you do need to contact CNS Systems, ask for Rick Hambly.

Greg. w9gb

BTW, I have used a Motorola GPS timing receiver for my personal time
synchronization since 1997.
The hardware and software (TAC32) that I was a beta tester for ... is now
available commercially from CNS Systems.

Much of the credit for this work goes to Tom Clark at NASA (now retired) who
developed the prototype hardware and software in 1995 to replace the atomic
clocks for the Very Large Baseband Array (VLBA) for astronomy & geophysical
work.