Title




Pull versus push mechanism in large distributed networks : closed form results
 
Author




 
Abstract




In this paper we compare the performance of the pull and push strategy in a large homogeneous distributed system. When a pull strategy is in use, lightly loaded nodes attempt to steal jobs from more highly loaded nodes, while under the push strategy more highly loaded nodes look for lightly loaded nodes to process some of their jobs. Given the maximum allowed overall probe rate R and arrival rate lambda, we provide closed form solutions for the mean response time of a job for the push and pull strategy under the infinite system model. More specifically, we show that the push strategy outperforms the pull strategy for any probe rate R > 0 when lambda < phi  1, where phi = (1 + root 5)/2 approximate to 1.6180 is the golden ratio. More generally, we show that the push strategy prevails if and only if 2 lambda < root(R + 1)(2) + 4(R + 1)  (R + 1). We also show that under the infinite system model, a hybrid pull and push strategy is always inferior to the pure pull or push strategy. The relation between the finite and infinite system model is discussed and simulation results that validate the infinite system model are provided. 
 
Language




English
 
Source (book)




24th International Teletraffic Congress (ITC), September 47, 2012, Krakow, Poland
 
Publication




2012
 
ISBN




9780983628347
 
Volume/pages




(2012)
, p. 129136
 
ISI




000311859600017
 
Full text (open access)




 
