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Chapter 5 Record Storage & Primary File Organizations

Chapter 5 Record Storage & Primary File Organizations

Chapter 5 Record Storage & Primary File Organizations. Storage. The are two general types of storage media that is used with computers. They are : Primary Storage - This includes all storage media that can be operated on directly by the CPU (RAM , L1 and L2 Cache Memory)

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1.12k views • 57 slides
Improvements to A-Priori

Improvements to A-Priori

Improvements to A-Priori. Bloom Filters Park-Chen-Yu Algorithm Multistage Algorithm Approximate Algorithms Compacting Results. Aside : Hash-Based Filtering. Simple problem : I have a set S of one billion strings of length 10.

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622 views • 49 slides
Hashing II:

Hashing II:

Hashing II:. The leftovers. Hash functions. Choice of hash function can be important factor in reducing the likelihood of collisions Division hashing: key % CAPACITY Certain table sizes are more conducive to collision avoidance with this method

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319 views • 21 slides
CPS 196.03: Information Management and Mining

CPS 196.03: Information Management and Mining

CPS 196.03: Information Management and Mining. Association Rules and Frequent Itemsets. Improvements to A-Priori. Park-Chen-Yu Algorithm Multistage Algorithm Savasere, Omiecinski, and Navathe Algorithm. PCY Algorithm. Hash-based improvement to A-Priori.

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299 views • 17 slides
Hashing

Hashing

Hashing. A very efficient method for implementing a dictionary, i.e., a set with the operations: insert find delete Applications: databases symbol tables. Hash tables and hash functions. Hash table: an array with indices that correspond to buckets

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263 views • 5 slides

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