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Message Posted: Thu, 05 Dec 2002 @ 22:41:16 GMT


     
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Subj:   Re: Loading Fact data directly onto Teradata
 
From:   Terry Stover

You can trap the data type errors in the fast load, the bad records go to an error file. At my old job we had a perl "fixer" that corrected the common errors and reloaded the corrected records and the error stats. Fast load can check constraints, I assume it would check RI constraints so you could pick up new keys with a 2 pass process.

WRT delete / insert to bypass transient journal, if you have the space you can do a new table then a rename when it's loaded. With continous availability you'd probably have to boot everyone off to replace the production table, the access lock for read will block any ddl.

I've used Informatica but not against Teradata. You might be better off outputting Informatica to a text file then doing a fast load. With sqlserver we found bcp to be 2-3x faster than Informatica loading the db directly.

Finally, NCR advertises TPUMP for the continuous availability / continuous update problem. I don't know anyone who has used it though.



     
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