I/O Parallelism Partitioning techniques(number of nodes n): Round-robin: Send the ith tuple inserted in the relation to node i mod n. Hash partitioning: Choose one or more attributes as the partitioning attributes. Choose hash function h with range 0...n-1 Let i denote result of hash function h applied to the partitioning attribute value of a tuple.Send tuple to node i. Database System Concepts-7th Edition 21.5 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 21.5 ©Silberschatz, Korth and Sudarshan th Edition I/O Parallelism ▪ Partitioning techniques (number of nodes = n): Round-robin: Send the i th tuple inserted in the relation to node i mod n. Hash partitioning: • Choose one or more attributes as the partitioning attributes. • Choose hash function h with range 0…n - 1 • Let i denote result of hash function h applied to the partitioning attribute value of a tuple. Send tuple to node i