How much data is too much through a DB_link?

Hello,
I need to move data from approximately 40 tables from Oracle into a SQL Server.  I see the ODBC/database link method in this forum.  What is the recommended cutoff for amount of data moved through a DBlink?  In older versions moving a lot of data was considered a performance issue.  Could you truncate and load a 4 million row table through a dblink with acceptable performance over a 1gb pipe?  10gb pipe?

There are no official benchmarks available for the Database Gateway for ODBC as this gateway depends on the features supported by the ODBC driver being used. There are ODBC drivers that do not support bulk fetching. They have to fetch the data row by row which is surly slower then using a driver that supports bulk fetching.
So you really have to check if the gateway works for your particular requirement.
Just in case it doesn't there's also GoldenGate which is able to replicate data between Oracle and SQL server.
- Klaus

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