Here's a theory: Eyal is referring to chained and migrated rows. With media
recovery, the recovering instance infers where the migrated or chained data is
located, becuase it is an exact physical copy. Since the SharePlex replicated
instance is not an exact physical copy of the primary, it must go back to the
source database to figure out which blocks' changes represent changes for a
block that SharePlex already knows about.
--
Jeremiah Wilton
http://www.speakeasy.net/~jwilton
On Tue, 29 May 2001, Jared Still wrote:
>
> So how does a standby database work if the logs don't contain
> complete transactions?
>
> On Tuesday 29 May 2001 12:01, Jim Hawkins wrote:
>
> From note on MetaLink:
>
> > 1) There is not sufficient information in the logs to logically
> > replicate transactions, so the data applied to the destination system
> > may be different from the primary, and therefore inaccurate.
--
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--
Author: Jeremiah Wilton
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