[mysql-dde] Re: Clocks Synchronization

  • From: "Fabricio Mota" <fabricio.oliveira@xxxxxxxxxxxxxxxx>
  • To: "dde" <mysql-dde@xxxxxxxxxxxxx>
  • Date: Mon, 12 Dec 2005 14:54:09 -0200

Hey, man!

Another problem (I'm noting all of them) hahahaha

If we don't sync the clocks (and I guess it's better don't sync them), what 
about the funcion Now() ???

And if the clocks being different, the user uses the time to comparate 
critical values order?



----- Original Message ----- 
From: "Peter B. Volk" <PeterB.Volk@xxxxxxx>
To: "Fabricio Mota" <fabricio.oliveira@xxxxxxxxxxxxxxxx>
Sent: Monday, December 12, 2005 3:42 PM
Subject: Re: [mysql-dde] Re: Clocks Synchronization


>
> ----- Original Message ----- 
> From: "Fabricio Mota" <fabricio.oliveira@xxxxxxxxxxxxxxxx>
> To: <mysql-dde@xxxxxxxxxxxxx>
> Sent: Monday, December 12, 2005 4:48 PM
> Subject: [mysql-dde] Re: Clocks Synchronization
>
>
>> Yes, I do! send me please.
>>
>>
>> ----- Original Message ----- 
>> From: "Peter B. Volk" <peter.benjamin.volk@xxxxxxxxxxxxxxxxx>
>> To: <mysql-dde@xxxxxxxxxxxxx>
>> Sent: Monday, December 12, 2005 12:45 PM
>> Subject: [mysql-dde] Re: Clocks Synchronization
>>
>>
>> > Well I know rather a lot about it since we hade about 4 lectures about
> it.
>> > The percision is as high as good you clock hadware is. The porblem with
>> > cloc
>> > synch is that you have a drift rate of the clock plus network overhead.
>> > now
>> > these numbers are only detectable with multible hardwareclocks. If you
>> > like
>> > I can send you several ppt slides that have to do with clock synch.
>> >
>> > In terms of DDE I'd like to avoid any type of clock synch because this
>> > would
>> > make averything a lot harder.
>> >
>> > Peter
>> >
>> >
>> > ----- Original Message ----- 
>> > From: "Fabricio Mota" <fabricio.oliveira@xxxxxxxxxxxxxxxx>
>> > To: "dde" <mysql-dde@xxxxxxxxxxxxx>
>> > Sent: Monday, December 12, 2005 2:43 PM
>> > Subject: [mysql-dde] Clocks Synchronization
>> >
>> >
>> >> Hey man,
>> >> What do you know about clocks sync in Distributed Systems? What kind 
>> >> of
>> > precision is possible to reach among machines?
>> >>
>> >> Fabricio Mota
>> >> Analista de Sistemas
>> >> FCPC - Divisão de Planejamento do Cadastro Comercial
>> >> MySql-DDE discussion list
>> >> www.freelists.org/
>> >>
>> >
>> > MySql-DDE discussion list
>> > www.freelists.org/
>> >
>> >
>>
>> MySql-DDE discussion list
>> www.freelists.org/
>>
> 

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