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In this letter, we investigate a class of codes with the following property: any decodable set of erased symbols can be repaired from any single set of several disjoint symbol sets with small cardinality. We refer such codes to locally repairable codes (LRCs) with joint availability. In particular, if information symbols of a code have this property, then we refer the code to an LRC with joint information...
Energy management systems (EMSs) form an important part of many Demand-Side Management (DSM) projects implemented on South African mines. Sustained EMS performance is only possible with proper system maintenance. However, it is challenging to maintain a large number of EMSs remotely. One of the main challenges associated with sustained EMS performance is changing production strategies. Although these...
Currently, the network I/O is greater than the disk I/O. Even further, network I/O capacity increases at a faster rate than the capacity of hard disk I/O. If the gap between the disk I/O and the network I/O continues to grow, current technologies may not be the optimum choices anymore. Virtual machine migration is one of the most frequently mentioned operations in datacenters. One of the purposes...
The method using virtual servers for balancing the load in DHT-Based P2P systems has been researched deeply. However, it is not been widely used because virtual servers migration may result in the imbalance of single virtual server, which we called SVSP. Besides, it is uncertain to the node that how many virtual servers should be hosted during the initialization. In this paper, we propose a novel...
This paper discussed the, meaning and related techniques of constructing the high-performance WEB sites for the self-help service system, for the sake of advance usability and dependability of the self-help service system, design the project that carrying out gather-group technique of servers and load-balanced technique in system, it is mostly considered the complexion of the difference construct...
File replication and file consistency maintenance are two important protocols for achieving overall high performance of peer-to-peer file sharing systems. In spite of the significant dependency of consistency maintenance on file replication, there has been little file replication research devoted to tackling the dependency issue. Most traditional file replication protocols focus on improving file...
DHT (Distributed Hash Table) algorithms are very efficient for distributed data storage and retrieval. As one kind of P2P overlay, DHT overlay also has the advantages of high reliability, high scalability and low cost. DHT has not only been applied to form user nodes' overlays, but also been proposed to form DHT-based server farms, such as DHT-based SIP server farm, HSS server farm, DNS server farm,...
Distributed systems such as peer-to-peer overlays have been shown to efficiently support the processing of range queries over large numbers of participating hosts. In such systems, uneven load allocation has to be effectively tackled in order to minimize overloaded peers and optimize their performance. In this work, we detect and analyze the two basic methodologies used to achieve load-balancing:...
Current virtual server-based load balancing schemes for DHT have been shown to be able to achieve excellent load balancing effectiveness. However, they face two important issues. They suffer from problems of incurring extremely high overheads, and inducing severe inconsistency in DHT routing state. We present two fundamental components, virtual server management and active stabilization, whose inclusion...
In structured P2P networks, the heterogeneity of node capacity, the skewness in query pattern and the greedy routing strategy could result in the load imbalance problem. However, existing load balancing algorithms for structured P2P networks mainly focused on handling the heterogeneity among nodes and the skewed workload. To deal with the load imbalance issue caused by the greedy routing strategy,...
The content delivery networks (CDN) paradigm is based on the idea to transparently move third-party content closer to the users. More specifically, content is replicated on CDN servers which are located close to the final users, and user requests are redirected to the "best" replica (e.g., the closest) in a transparent way, so that users perceive a better content access service. In this...
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