Globule: A Platform for Self-Replicating Web Documents

Abstract

Abstract.Replicating Web documents at a worldwide scale can help reduce user-perceived latency and wide-area network traffic. This paper presents the design of Globule, a platform that automates all aspects of such replication: serverto-server peering negotiation, creation and destruction of replicas, selection of the most appropriate replication strategies on a per-document basis, consistency management and transparent redirection of clients to replicas. Globule is initially directed to support standard Web documents. However, it can also be applied to stream-oriented documents. To facilitate the transition from a non-replicated server to a replicated one, we designed Globule as a module for the Apache Web server. Therefore, converting Web documents should require no more than compiling a new module into Apache and editing a configuration file.

P2P-Based Approach to Finding Replica Server Locations for Alleviating Flash Crowds

“…• Globule, which selects machines with Globule method [7], [24], [25]. Globule relies on global information such as access logs of all servers.…”

“…Tse [9] proposed the repositioning algorithm which reduces the computing cost to O(log N), where N denotes the number of machines. Globule [24], [25] with HotZone algorithm [7] enables us to dynamically position replicas so that the latency between a client and the replica is minimized.…”

Proactive hot spot avoidance for Web server dependability

“…The approach is essentially reactive and uses an underlying DHT for storing the content at risk. Our system is most similar to Globule [20] in its implementation. Globule is a Web server module that replicates documents according to observed access patterns, in order to spontaneously create cache copies on peer servers close to the clients.…”

Dynamically selecting optimal distribution strategies for Web documents

“…To integrate adaptive distributed documents into the World Wide Web, we are developing the Globule platform [30]. In this system, Web servers cooperate with each other to replicate documents among them and to transparently direct client requests to the ªbestº replica.…”