Improving the Hybrid Data Dissemination Model of Web Documents

Abstract

One of the major problems in the Internet today is the scalable delivery of data. With more and more people joining the Internet community, web servers and services are being forced to deal with workloads beyond their original data dissemination design capacity. One solution that has arisen to address scalability is to use multicasting, or push-based data dissemination, to send out data to many clients at once. More recently, the idea of using multicasting as part of a hybrid system with unicasting has shown positive results in increasing server scalability. In this paper we focus on solving problems associated with the hybrid dissemination model. In particular, we address the issues of document popularity and document division while arguing for the use of a third channel, called the multicast pull channel, in the hybrid system model. This channel improves performance in terms of response time while improving the robustness of the hybrid system. We show through extensive simulation using our working hybrid server the usefulness of this additional channel and its improving effects in creating a more scalable and more efficient web server.

Distributed top-k full-text content dissemination

“…When receiving the Fs from I 1 , an IS, say I 2 , leverages the received Fs to prune some of its polled documents in step (4), and forwards the remaining documents back to I 1 in step (5). In the steps (3)(4)(5), using the Fs to prune unnecessary documents and forwarding only the remaining documents leads to less forwarding cost. After receiving the forwarded documents from all other ISes, I 1 finds the final top-k documents for its maintained filters.…”

“…4.3.1 and 4.3.2, we give the algorithm details in Algorithm 3. We first add terms to the set T (lines [3][4][5][6][7][8][9][10][11]. For such terms in T , we ensure that the upper bound Relevscore_ub (approximated by lines 5-8) is larger than T (t i ), i.e.…”

“…Instead, in this paper, we design the content dissemination scheme to offer a personalized subscription service with input keywords and the number of k as subscription conditions. In addition, Beaver et al [4] utilize the multicast-based push dissemination approach to improve the traditional request-response approach. The general idea of the push approach is similar to this paper.…”

“…The general idea of the push approach is similar to this paper. However, Beaver et al [4] focuse on the issue of mispredictions of document popularities, etc.…”

Mobile broadcast services with MIMO antennae in 4G wireless networks

“…Furthermore, data broadcast is able to serve any number of queries, and the query performance is not affected by the number of mobile clients in a cell [41]. Strategies to broadcast data through wireless channels have been effective in addressing the efficiency and scalability issue [2,41,42]. …”