Paul RuiZendaal wrote:

>> I don't see the point.
>>
>
> I was thinking about consistency between nodes, which isn't quite the C in
> ACID. As you said, it begins with proper definitions :^)
>
>

Here is a first approximation of consistency rules:

1. A transaction sees a constant view of the database plus any
updates performed by the transaction
2. A transaction cannot update or delete a version of a record that
it could not see
3. Primary and unique keys must be guaranteed unique
4. Referential constraints must be honored

What other elements of database consistency need to be maintained
implicitly or explicitly?

--
Jim Starkey
NimbusDB, Inc.
978 526-1376



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