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The power consumption of information systems, especially servers has to be reduced to realize green eco-society. A client first selects a server in a collection of possible servers and issues a request to the server. The request is performed as a process in the server. In this paper, we consider a computation type of application where CPU resource is mainly used in a server. It is critical to discuss...
The electric power consumption of servers has to be reduced in information systems in order to realize green societies. In information systems, servers mainly consume the electric power to process regrets from clients. We have to reduce the electric power consumed by servers. There are computation (CP), communication (CM), and storage (ST) types of applications to be performed on servers. In CP and...
Background Multimedia objects like music and movies are distributed to peers through downloading and caching in peer-to-peer (P2P) overlay networks. In this paper, we consider multimedia objects which are characterized in terms of not only data structure but also quality of service (QoS) like frame rate and number of colours. For example, there are a pair of replicas oiand ojof a fully coloured...
In this paper, we consider the peer-to-peer (P2P) model as a fully distributed, scalable system different from centralized coordinated systems like Cloud computing systems. A P2P system is composed of peer processes (peers). Here, applications are realized in activities and cooperation of a group of multiple peers. Since there is no centralized coordination in P2P systems, each peer has to obtain...
Multimedia objects are distributed to peers through downloading and caching in peer-to-peer (P2P) overlay networks. Multimedia objects are characterized in terms of not only data structure but also quality of service (QoS). Replicas of a multimedia object are partially ordered in terms of newness of data structure and QoS. We discuss the multimedia quorum-based (MQB) protocol to synchronize multiple...
The electric power consumption of servers hasto be reduced in information systems in order to realize green societies. In information systems, clients issue requests to servers and the servers spend electric power to handle the requests. We have to reduce the power consumption of servers since servers mainly consume electric power compared with clients. There are computation (CP), communication (CM),...
The extended power consumption laxity-based (EPCLB) algorithm is discussed for reducing the total power consumption of servers in general type applications in this paper. However, each time a load balancer receives a new request, the load balancer has to collect the state on computation and transmission laxities of processes and traffic in each server and estimate the power consumption to perform...
In order to realize digital ecosystems, the total electric power consumption of servers to perform application processes has to be reduced in information systems. Applications are classified into three types, computation, communication, and storage types of applications. In the computation and communication types of applications, CPU and communication resources of computers are mainly consumed, respectively...
In information systems, it is critical to reduce the total electrical power consumption of computers and networks in order to realize digital ecosystems. In the extended power consumption laxity-based (EPCLB) algorithm, a server is selected in a set of possible servers so as to not only satisfy deadline constraint but also reduce the total power consumption of servers in general types of applications...
Multimedia objects are distributed to peers through downloading and caching in peer-to-peer (P2P) overlay networks. In this paper, we consider multimedia objects which are characterized in terms of not only data structure but also quality of service (QoS). For example, there are a pair of replicas oi and oj of a movie object. Here, a content of a replica oi is changed while not in another replica...
In order to realize digital ecosystems, the total electric power consumption of servers to perform application processes has to be reduced in information systems. Applications are classified into three types, computation, communication, and storage based types. In the computation and communication types of applications, CPU and communication resources of computers are mainly consumed, respectively...
A group of multiple peers are required to cooperate with each other in distributed peer-to-peer (P2P) applications. Here, messages have to be causally delivered to every peer. In our approach to realizing a scalable P2P group, messages are ordered by taking advantage of linear time (LT) and physical time (PT) since message length is O(1). Here, each peer has to hold information on clock accuracy of...
Information systems are being shifted to scalable architectures like Cloud and peer-to-peer (P2P) models. In this paper, we consider the P2P model as a fully distributed, scalable system different from centralized coordination systems in Cloud and Grid systems. A P2P system is composed of peer processes (peers). Here, applications are realized by activities and cooperation among multiple peers. In...
In information systems, it is critical to reduce the total electrical power consumption of computers and networks in order to realize the digital ecosystems. In the extended power consumption laxity-based (EPCLB) algorithm, a server is selected in a set of servers so as to not only satisfy deadline constraint but also reduce the total power consumption of servers in general types of applications....
In information systems, resource objects like databases are distributed and replicated in order to increase the performance, reliability, and availability. Especially, multimedia objects like movies are distributed. In this paper, we consider multimedia objects which are characterized in terms of not only data structure but also quality of service (QoS). Here, a pair of replicas of a movie object...
Information systems are getting scalable like cloud computing systems and peer-to-peer (P2P) overlay networks. In information systems, resource objects like databases are distributed and replicated in order to increase the performance, reliability, and availability. In this paper, we consider multimedia objects like movies which are characterized in terms of not only data structure like part of relations...
Information systems are being shifted to scalable architectures like Cloud and peer-to-peer (P2P) models. In this paper, we consider the P2P model as a fully distributed, scalable system different from centralized coordination systems in Cloud and Grid systems. A P2P system is composed of peer processes (peers). Here, applications are realized by activities and cooperations among multiple peers. In...
A group of peers are required to cooperate with each other in distributed applications on P2P overlay networks. In order to realize a scalable P2P group, messages are causally ordered by taking advantage of linear time (LT) and physical time (PT) since message length is O(1) in this paper. In this paper, we newly discuss a multi-layered model to realize a scalable group. A group is hierarchically...
In order to realize digital ecosystems, the total electric power consumption of servers to perform applications has to be reduced in information systems. Applications are classified into computation, communication, and storage based types. In the computation and communication based applications, CPU and communication resources of computers are mainly consumed, respectively. In the storage-based applications,...
In information systems, it is critical to reduce the total electrical power consumption of computers and networks in order to realize the digital ecosystems and the green IT technologies. In the extended power consumption laxity-based (EPCLB) algorithm, a server is selected in a set of servers so as to not only satisfy deadline constraint but also reduce the total power consumption of servers in general...
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