Measurements on a high-performance Ethernet are shown to match well a truncated Cauchy probability distribution, with a much better fit over smaller file/request sizes than the commonly used Pareto distribution. We observe self similar characteristics in the traffic at both file servers and at a CPU server elsewhere in the network, which targets, predominantly, file and web servers. This sugges...

The majority of available wearable devices require communication with Internet servers for data analysis and storage, and rely on a paired smartphone to enable secure communication. However, wearable devices are mostly equipped with WiFi network interfaces, enabling direct communication with the Internet. Secure communication protocols should then run on these wearables itself, yet it is not cl...

Estimate of packet-loss rates between arbitrary Internet hosts is critical for many large-scale distributed applications, including overlay routing, P2P media streaming, VoIP, and edge-server location in CDNs. iPlane has been recently proposed to estimate delay, packet-loss rates, and bandwidth between arbitrary hosts [1]. To our knowledge, iPlane is the only published technique for estimating ...

The implementation of a system to support a learning web (Norrie and Gaines, 1995) involves the coordinated support of a wide range of knowledge processes in a learning community. These include the discourse processes among members of the community, the dissemination of knowledge through documents and multimedia resources, the elicitation, sharing and comparison of conceptual structures, and th...

Two emerging hardware trends have re-initiated the development of in-core database systems: ever increasing main-memory capacities and vast multi-core parallel processing power. Main-memory capacities of several TB allow to retain all transactional data of even the largest applications in-memory on one (or a few) servers. The vast computational power in combination with low data management over...

Without any additional hardware, CEFT-PVFS utilizes the existing disks on each cluster node to provide RAID-10 style parallel I/O service. In CEFT-PVFS, all servers are also computational nodes and can be heavily loaded by different applications running on the cluster, thus potentially degrading the I/O performance. To minimize the degradation, I/O requests can be scheduled on a less loaded ser...

AbstracrMirror sites enable client requests to be serviced by any of a number of servers, reducing load at individual servers and dispersing network load. Typically, a client requests service from a single mirror site. We consider enabling a client to access a file from multiple mirror sites in parallel to speed up the download. To eliminate complex client-server negotiations that a straightfor...

Bimap is a tool for synchronizing IMAP servers. It enables two or more IMAP mirrored servers to be modified independently and later on, synchronized. Bimap is versatile so, in addition to synchronizing emails, it can be used for filtering and classifying emails. For the sake of the example, the paper shows automatic emails classification and white-listing programmed with Bimap. Bimap is impleme...

This paper develops a secure distributed Constraint Satisfaction algorithm. A Distributed Constraint Satisfaction Problem (DisCSP) is a CSP in which variables and constraints are distributed among multiple agents. A major motivation for solving a DisCSP without gathering all information in one server is the concern about privacy/security. However, existing DisCSP algorithms leak some informatio...

Mirror sites enable client requests to be serviced by any of a number of servers, reducing load at individual servers and dispersing network load. Typically, a client requests service from a single mirror site. We consider enabling a client to access a file from multiple mirror sites in parallel to speed up the download. To eliminate complex client-server negotiations that a straightforward imp...