Re: Synchronous DB replication

From: <ctcgag_at_hotmail.com>
Date: 14 Feb 2003 02:34:52 GMT
Message-ID: <20030213213452.940$Mv@newsreader.com>

"Ralf Fernan" <ralphfernan.nospam_at_yahoo.com> wrote:
> I was wondering about how widespread synchronous replication is, and also
> what is the alternative solution. I don't have a good grip of how
> critical conflicts can be resolved with asynchronous replication, when
> asynchronous replication is used. For example, in a financial
> transaction, I and somebody else (on my behalf )could overdraw my account
> by near-simultaneous withdrawals in different geographic locations. How
> would asynchronous replication work in this case?

They put in place a differential conflict resolution rule, such that both withdrawals (eventually) get propagated, resulting in a negative balance, and then you get charged an overdraft fee.

Xho

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Received on Thu Feb 13 2003 - 20:34:52 CST