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- This work explores the effect of skewed data distribution on four parallel join algorithms in an d8 processor version of the Gamma database machine.(No TPS and SS).The JPS and RS were also low due to the effective hash function used.
- Result : Parallel hash based join algorithms (Hybrid, grace, and Simple ) are more sensitive to RS resulting from AVS in the "building" relation (due to hash table overflow) but are relatively insensitive to the RS in the "probing " relation. For double skew results extrapolate to a worse outcome.
DBMS
1999-03-11