Hashing with Buckets. read 1 6+4 = 10.

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Hashing with Buckets

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Transcript of Hashing with Buckets. read 1 6+4 = 10.

Page 1: Hashing with Buckets. read 1 6+4 = 10.

Hashing with Buckets

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read

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1

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6+4 = 10

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2

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Cluster 1: Adams Coles Flint

Cluster 2: Bates Dean

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The problem is that the home address of dean, which is the head of a cluster, is not free

(20)Adams (20)Coles (22)Dean (20)Flint

Two clusters

Overlapped

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25

-1

-1

22

23

-1

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Solution

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3

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b >=1, may be more than one slot in

bucket

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4

Actual Addresses .See next slide

Applicable to variable

length records

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Patterns of records access

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Summary : Hashing technique

• Progressive overflow• Other techniques

1. Double hashing2. Chained progressive overflow3. Chaining with a separate overflow area4. Scatter tables

Buckets


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