Fast Randomized Test-and-Set and Renaming

Most people believe that renaming is easy: simply choose a name at random; if more than one process selects the same name, then try again. We highlight the issues that occur when trying to implement such a scheme and shed new light on the read-write complexity of randomized renaming in an asynchronous environment. At the heart of our new perspective stands an adaptive implementation of a randomized test-and-set object, that has poly-logarithmic step complexity per operation, with high probability. Interestingly, our implementation is anonymous, as it does not require process identifiers. Based on this implementation, we present two new randomized renaming algorithms. The first ensures a tight namespace of n names using O(n log4 n) total steps, with high probability. This significantly improves on the complexity of the best previously known namespace-optimal algorithms. The second algorithm achieves a namespace of size k(1 + ) using O(k log4 k/ log2 (1 + )) total steps, both with hig...

• Type: Journal
• Year: 2010
• Where: WDAG
• Authors: Dan Alistarh, Hagit Attiya, Seth Gilbert, Andrei Giurgiu, Rachid Guerraoui
• Keywords: Algorithm, Algorithms, Randomized, Step Complexity, WDAG 2010