Explain how many block transfers and disk seeks this join

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Reference no: EM133431075

Question: Consider a situation where merge join is applied to relations R and S. Answer each of the following questions:

(a) Assume relations R and S are already sorted by the join column(s). Explain how many block transfers and disk seeks this join requires when it uses, for each of R and S, a separate buffer that can hold up to 5 × 106 disk blocks.

(b) Explain whether it is more advantageous to use hash join or merge join when only R is sorted by the join column(s) and thus S needs to be sorted (only for merge join, not hash join). Justify your answer by considering the number of block transfers (and ignoring the number of disk seeks) for each of these two join scenarios.

Reference no: EM133431075

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