Abstract –– In distributed computing environments, fault–tolerance is an important objective, especially for parallel applications. Many distributed computing environments achieve fault–tolerance by periodic checkpointing. This has the advantage of relative ease of implementation and can be considered equivalent to task migration. However, there are two main disadvantages of such environments. ...

Postcopy migration is a mature technology in virtualization. However the performance of postcopy is not stable. We find many memory intensive loads having a high proportion of independent fixed-size data (FSD) cases. To improve migration performance, we present DP: an algorithm which applies to intelligently tackle FSD load during postcopy migration. We implement DP as an online algorithm trigg...

In this paper we present a dynamic network traffic balancing approach using strong migration on an agent based grid environment. The paper focuses on three different areas, namely load balancing, strong mobility and CSP (Constraint Satisfaction Problem) approach. We use CSP approach for making task migration decisions. Strong task migration is used to move tasks between nodes at runtime to main...

The migration of the execution context has been applied to remote execution and mobile agents, and noncooperative migration can be applied to even more applications, such as load balancing. We have therefore designed a system for the migration of Java threads, one that allows noncooperative and heterogeneous migration of the execution context of the running code. This paper describes an overvie...

Multi-core nodes with Non-Uniform Memory Access (NUMA) are now a common architecture for high performance computing. On such NUMA nodes, the shared memory is physically distributed into memory banks connected by a network. Owing to this, memory access costs may vary depending on the distance between the processing unit and the memory bank. Therefore, a key element in improving the performance o...

Database systems serving cloud platforms must serve large numbers of applications (or tenants). In addition to managing tenants with small data footprints, different schemas, and variable load patterns, such multitenant data platforms must minimize their operating costs by efficient resource sharing. When deployed over a pay-per-use infrastructure, elastic scaling and load balancing, enabled by...

Generic load balancing policies for irregular parallel applications may be efficiently implemented by integrating preemptive thread migration into the runtime support. In this context, a delicate issue is to manage pointer validity in a migration-safe way. In [1] we presented an iso-address approach to this problem. This paper discusses the impact of the iso-address migration scheme on the runt...

The migration of the execution context has been applied to remote execution and mobile agents, and asynchronous migration can be applied to even more applications, such as load balancing. We have therefore designed a system for the migration of Java threads, one that allows asynchronous and heterogeneous migration of the execution context of the running code. This paper describes an overview of...

Optimizing a given software system to exploit the features of the underlying system has been an area of research for many years. Recently, a number of self-adapting software systems have been designed and developed for various computing environments. In this paper, we discuss the design and implementation of a software system that dynamically adjusts the parallelism of applications executing on...

Task migration and load sharing algorithms are two load balancing strategies that are essential in distributed memory multiprocessor as well as in multicomputer environments. Dynamic load balancing is more suitable in heterogeneous systems. Various load sharing and global centralized algorithms have been proposed in the literature. These algorithms demand careful investigation about their suita...