Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Tuesday, November 03, 2015, 12:15 pm

Duration: 45 minutes

Location: CAB G51

Speaker: Lazar Todorovic

Local Search Insertion for k-ways Cuckoo Hashing

We will present the paper "Balls into Bins made Faster" (Megha Khosla, 2013). This paper introduces an algorithm, called "local search allocation", for a specific version of the balls into bins problem defined as follows:

-Each bin can can hold at most one ball.
-Each ball chooses k bins uniformly at random and can only be placed into those bins.
-The goal is to allocate all balls into bins such that the two constraints are not violated.
This definition is relevant in practice as it corresponds to Cuckoo Hashing with k hash functions (k-ways CH).

We will show that the local search allocation algorithm is correct and finds a valid allocation in linear time (with high probability) when there exists one.


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