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Raja_KT 1246 posts Joined 07/09
12 Sep 2013
NoPI hashing algorithm

It seems that for a NoPI table , a query id is submitted to a randomized hashing algorithm to produce a hash value comprising of hash bucket number and a remainder. This number is used to assign a row into an amp. Once it reaches an amp, the amp software in turn generates a different hash bucket number and treats it as a RowID.
If it is so, then how does it do a lookup to the hashmap and it is  more time-consuming than a normal PI.
Can anyone please throw some light upon this for me?
Thanks and regards,

Raja K Thaw

My wiki:

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