We are looking into the product as well, but have yet to even toy with the product.
There is a "no chained rows" restriction. Shareplex does not replicate transactions
on sys objects. A table dropped on one side will not be dropped on the other. It
apparently will replicate truncates however. It's one thing to read the logs and to
find the time when a truncate caused writes to the data dictionary, but quite another
to reconstruct the statement.
I didn't think Quest was pushing Shareplex for disaster recovery tool but for
replication.
Ian MacGregor
Stanford Linear Accelertor Center
[EMAIL PROTECTED]
-----Original Message-----
Sent: Tuesday, May 29, 2001 1:45 PM
To: Multiple recipients of list ORACLE-L
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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