Summary cache: a scalable wide-area Web cache sharing protocol
Proceedings of the ACM SIGCOMM '98 conference on Applications, technologies, architectures, and protocols for computer communication
Performance study of a collaborative method for hierarchical caching in proxy servers
WWW7 Proceedings of the seventh international conference on World Wide Web 7
Computer Networks and ISDN Systems - Selected papers of the 3rd international caching workshop
Not all hits are created equal: cooperative proxy caching over a wide-area network
Computer Networks and ISDN Systems - Selected papers of the 3rd international caching workshop
On the scale and performance of cooperative Web proxy caching
Proceedings of the seventeenth ACM symposium on Operating systems principles
Analysis of web caching architectures: hierarchical and distributed caching
IEEE/ACM Transactions on Networking (TON)
On the use and performance of content distribution networks
IMW '01 Proceedings of the 1st ACM SIGCOMM Workshop on Internet Measurement
On the sensitivity of cooperative caching performance to workload and network characteristics
SIGMETRICS '02 Proceedings of the 2002 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Reduce, Reuse, Recycle: An Approach to Building Large Internet Caches
HOTOS '97 Proceedings of the 6th Workshop on Hot Topics in Operating Systems (HotOS-VI)
Design Considerations for Distributed Caching on the Internet
ICDCS '99 Proceedings of the 19th IEEE International Conference on Distributed Computing Systems
A hierarchical internet object cache
ATEC '96 Proceedings of the 1996 annual conference on USENIX Annual Technical Conference
Limitations and benefits of cooperative proxy caching
IEEE Journal on Selected Areas in Communications
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Systems consisting of multiple edge servers are a popular solution to deal with performance and network resource utilization problems related to the growth of the Web. After a first period of prevalent enthusiasm towards cooperating edge servers, the research community is exploring in a more systematic way the real benefits and limitations of cooperative caching. Hierarchical cooperation has clearly shown its limits. We show that the ''pure'' protocols (e.g., directory-based, query-based) applied to a flat cooperation topology do not scale as well. For increasing numbers of cooperating edge servers, the amount of exchanged data necessary for cooperation augments exponentially, or the cache hit rates fall down, or both events occur. We propose and evaluate two hybrid cooperation schemes for document discovery and delivery. They are based on a semi-flat architecture that organizes the edge servers in groups and combines directory-based and query-based cooperation protocols. A large set of experimental results confirms that the combination of directory-based and query-based schemes increases the scalability of flat architectures based on ''pure'' protocols, guarantees more stable performance and tends to reduce pathologically long response times.