Clock differences on servers

[Josh]

I posted this in the distributed apps section but there wasn't a single
answer. It seems that this forum is a little busier and just as
applicable so I'll try again.

Imagine I have a distributed app on a number of servers, say a web farm

and a couple of app servers.

Can you think of any techniques that would allow me to be *accurately*
aware of any difference in clock time between the boxes. It sounds
fairly straightforward, but if you want a high level of accuracy, you'd

need to consider latency in any network call you use to check it.

[Jon Skeet [C# MVP]]

Josh <jo********@gmail.comwrote:

I posted this in the distributed apps section but there wasn't a single
answer. It seems that this forum is a little busier and just as
applicable so I'll try again.

Imagine I have a distributed app on a number of servers, say a web farm

and a couple of app servers.

Can you think of any techniques that would allow me to be *accurately*
aware of any difference in clock time between the boxes. It sounds
fairly straightforward, but if you want a high level of accuracy, you'd

need to consider latency in any network call you use to check it.

I suggest you look into NTP. Even if it doesn't give you anything to
directly help you, there are probably some useful ideas you'll find by
reading the documentation, RFCs etc.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
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