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Message Posted: Fri, 22 Oct 2004 @ 08:01:27 GMT


     
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Subj:   Re: V2R5 Upgrade and CHECKSUM
 
From:   Victor Sokovin

Mark,

  Today's high speed processors, memories and advanced caching make it reasonable to perform a checksum in software, trading data integrity protection for a moderate performance impact. This tradeoff can be fine tuned through the advanced controls offered by the Teradata Disk I/O Integrity Check Feature. First, the feature is optional. Second, the feature may be enabled on a table by table basis. Third, the checksum may be applied to some or all of the data corresponding to each disk sector.  



I recently had a chance to look at some CRC calculations (outside of Teradata but that's aside) and am now convinced that it is not a luxury thing to calculate them on a regular basis. Thanks for the heads up on this new feature in TD. Could you explore a bit more on the last part you mentioned, i.e., the disk sector level?


Regards,

Victor



     
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