Nowadays cooperative web caching has shown to improve the performance in Web document access. That is why the interest in works related to web caching architectures designs has been increasing. This paper discusses and compares performances of some cooperative web caching designs (hierarchy, mesh, hybrid) using different document validation/replication methods (TTL, invalidation, pushing, etc)....

We study the cache performance in a remote caching architecture. The high performance networks in many distributed systems enable a site to access the main memory of other sites in less time than required by local disk access. Remote memory is thus introduced as an additional layer in the memory hierarchy between local memory and disks. Eficient use of remote memory implies that the system cach...

Object replication and cacheing have been used individually in distributed systems for many years. There are benefits from being able to support both: replication for availability, and cacheing for performance. Although both involve handling multiple copies of objects, there are sufficient differences between the two to make the design of an integrated approach a challenging exercise. In this p...

To alleviate scalability problems in the Web, many researchers concentrate on how to incorporate advanced caching and replication techniques. Many solutions incorporate objectbased techniques. In particular, Web resources are considered as distributed objects offering a well-defined interface. We argue that most proposals ignore two important aspects. First, there is little discussion on what k...

With the explosive growth of demand for services on the Internet, the networking infrastructure (routers, protocols, servers) is under considerable stress. Mechanisms are needed for current and future IP services to scale in a client-transparent way. We present HydraNet, an infrastructure that allows to dynamically distribute IP services by placing service agents (caching agents, mirrors, repli...

With the explosive growth of demand for services on the Internet, the networking infrastructure (routers, protocols, servers) is under considerable stress. Mechanisms are needed for current and future IP services to scale in a client-transparent way. We present HYDRANET, an infrastructure that allows to dynamically distribute IP services by placing service agents (caching agents, mirrors, repli...

ÐA common way to address scalability requirements of distributed services is to employ server replication and client caching of objects that encapsulate the service state. The performance of such a system could depend very much on the protocol implemented by the system to maintain consistency among object copies. We explore scalable consistency protocols that never require synchronization and c...

Multilevel caching, common in many storage configurations, introduces new challenges to traditional cache management: data must be kept in the appropriate cache and replication avoided across the various cache levels. Some existing solutions focus on avoiding replication across the levels of the hierarchy, working well without information about temporal locality–information missing at all but t...

This paper analyzes recent research in the field of distributed file systems, with a particular emphasis on the problem of high availability. Several of the techniques involved in building such a system are discussed individually: naming, replication, multiple versions, caching, stashing, and logging. These techniques range from extensions of ideas used in centralized file systems, through new ...

The addition of storage capacity in network nodes for the caching or replication of popular data objects results in reduced end-user delay, reduced network traffic, and improved scalability. The problem of allocating an available storage budget to the nodes of a hierarchical content distribution system is formulated; optimal algorithms, as well as fast/efficient heuristics, are developed for it...