The effects of relative fuel load on migration speed and on vulnerability have been investigated, but the effects of seasonal variation in predation danger on the amount of fuel and duration of stopover have not been considered. We analyzed seasonal patterns of stopover residence times for western and semipalmated sandpipers Calidris mauri and C. pusilla on southward migration in relation to th...

Distributed systems have the potentiality of becoming an alternative platform for parallel computations. However, there are still many obstacles to overcome, one of the most serious is that distributed systems typically consist of shared heterogeneous components with highly variable computational power. In this paper we present a load balancing support that checks the load status and, if necess...

— Dynamic virtual machine migration is a key technique technology in the cloud computing, an algorithm is proposed in this thesis, which is a dynamic resource scheduling based on minimum load imbalancing measurement. First of all, load balancer in scheduler judges the overload phenomenon; we need to migrate VM (Virtual Machine) on physical machine. Then, according to the records in load balanc...

The Time Warp Operating System (TWOS) executes event-driven simulations in an optimistic style on parallel machines. Recently TWOS has been substantially improved by the addition of dynamic load management for the purpose of (a) handling fluctuations in a simulation’s performance, (b) dealing effectively with dynamic creation and destruction of processes, and (c) eliminating the burden on users...

This paper examines load sharing and job scheduling in a network of workstations (NOW). Along with traditional methods of load sharing and job scheduling, it also examines methods referred to as epoch load sharing and epoch scheduling respectively. Epoch load sharing evenly distributes the load among workstations with job migration that occurs only at the end of predefined intervals. The time i...

Virtualization can deliver significant benefits for cloud computing by enabling VM migration to improve utilization, balance load and alleviate hotspots. While several mechanisms exist to migrate VMs, few efforts have focused on optimizing migration policies in a multirooted tree datacenter network. The general problem has multiple facets, two of which map to generalizations of well-studied pro...

As range shifts coincident with climate change have become increasingly well documented, efforts to describe the causes of range boundaries have increased. Three mechanisms-genetic impoverishment, migration load, or a physical barrier to dispersal-are well described theoretically, but the data needed to distinguish among them have rarely been collected. We describe the distribution, abundance, ...

Dynamic load balancing techniques have proved to be the most critical part of an eecient implementation of various algorithms on large distributed computing systems. In this paper a classification of dynamic distributed load balancing algorithms for homogeneous multiprocessor systems is introduced and a general test bed, using a random branch & bound load-generator, for evaluating load balancin...

In this paper, we present a performance study on three diierent load balancing algorithms. The rst algorithm employs only task assignment, whereas the other two allow both task assignment and migration. We conclude that although task migration usually costs more than task assignment, under some situations it can augment task assignment to provide extra performance improvement. This is because t...

We consider the following dynamic load balancing game: Given an initial assignment of jobs to identical parallel machines, the system is modified; specifically, some machines are added or removed. Each job’s cost is the load on the machine it is assigned to; thus, when machines are added, jobs have an incentive to migrate to the new unloaded machines. When machines are removed, the jobs assigne...