We introduce a new performance metric, called Load Balancing Factor (LBF), to evaluate different tuning alternatives of workload migration within a distributed/parallel program. The metric is unique because it shows the performance implications of a specific tuning alternative rather than quantifying where time is spent in the program. Previously we developed a variation of the metric for coars...

Experimental and simulation studies have been realized to quantify the potential of migration to improve performance over the initial placement. In these studies, we tried to characterize the conditions under which this improvement can be obtained. We found that these conditions are strictly related to the heterogeneity of the task execution time and sometimes they are related to the number of ...

Quantitative genetics models have been used to predict the constraints on local adaptation caused by gene flow between populations under migration-selection balance. One key assumption of this approach is that genetic values within a population are normally distributed. Gene flow, however, may generate distributions that are skewed toward the immigrant's mean value. If the response to selection...

Networks of workstations are fast becoming the standard environment for parallel applications. However, the use of “found” resources as a platform for tightly-coupled runtime environments has at least three obstacles: contention for resources, differing processor speeds, and processor heterogeneity. All three obstacles result in load imbalance, leading to poor performance for scientific applica...

In the course of the last few years, the user's interaction with parallel computer-systems has changed. A continuous growth in the number of interactive HPCapplications can be observed. When considering partitionable MPP-systems with exclusive usage of the physically separated regions, issues like the average waiting-time become more dominant for the users than the total system-throughput. In t...

Migration tends to oppose the effects of divergent natural selection among populations. Numerous theoretical and empirical studies have demonstrated that this migration-selection balance constrains genetic divergence among populations. In contrast, relatively few studies have examined immigration's effects on fitness and natural selection within recipient populations. By constraining local adap...

The feature of load sharing or load balancing involves migration of running processes from highly loaded workstations of a network to the lightly-loaded or idle workstations of the network. This paper describes load balancing techniques to share the workload of the workstations belonging to a particular network to gain better performance from the overall network. The mechanisms of load informat...

With the existing power SDN network architecture, improved switches migration algorithm is put forward. Through advantages of ant colony and genetic fusion, process optimized, fusion in uses operation, such as restrictions advance pruning efficiency to eventually apply under multiple controllers switch. The stability switch multicontroller are improved, performance RYU controller compared with ...