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Message Posted: Thu, 05 Apr 2012 @ 13:39:23 GMT

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Subj:   Re: How Hashing algorithm works?
From:   Danti Naga Dhana Lakshmi Parupudi

Hello Sughesh,

Input to the Hashing Algorithm is the Primary Index (PI) value of a row.

The output from the algorithm is the Row Hash,a 32-bit binary value.

The first 16 bits of a Row Hash is the Destination Selection Word (DSW).

The DSW points to one entry Hash map(A one-dimensional array that associates DSW values with specific AMPs)

The referenced Hash Map entry identifies the AMP for the row hash.


Dhana Lakshmi

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