Scale and performance in a distributed file system
ACM Transactions on Computer Systems (TOCS)
Leases: an efficient fault-tolerant mechanism for distributed file cache consistency
SOSP '89 Proceedings of the twelfth ACM symposium on Operating systems principles
Proceedings of the fifth international World Wide Web conference on Computer networks and ISDN systems
Removal policies in network caches for World-Wide Web documents
Conference proceedings on Applications, technologies, architectures, and protocols for computer communications
Improving end-to-end performance of the Web using server volumes and proxy filters
Proceedings of the ACM SIGCOMM '98 conference on Applications, technologies, architectures, and protocols for computer communication
Exploiting regularities in Web traffic patterns for cache replacement
STOC '99 Proceedings of the thirty-first annual ACM symposium on Theory of computing
Proceedings of the ninth annual ACM-SIAM symposium on Discrete algorithms
Aging through cascaded caches: performance issues in the distribution of web content
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
Volume Leases for Consistency in Large-Scale Systems
IEEE Transactions on Knowledge and Data Engineering
Image-based Rendering with Controllable Illumination
Proceedings of the Eurographics Workshop on Rendering Techniques '97
Proactive Caching of DNS Records: Addressing a Performance Bottleneck
SAINT '01 Proceedings of the 2001 Symposium on Applications and the Internet (SAINT 2001)
Application-level document caching in the Internet
SDNE '95 Proceedings of the 2nd International Workshop on Services in Distributed and Networked Environments
Maintaining Strong Cache Consistency in the World-Wide Web
ICDCS '97 Proceedings of the 17th International Conference on Distributed Computing Systems (ICDCS '97)
The age penalty and its effect on cache performance
USITS'01 Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3
PRO-COW: Protocol compliance on the web-a longitudinal study
USITS'01 Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3
Scalable web caching of frequently updated objects using reliable multicast
USITS'99 Proceedings of the 2nd conference on USENIX Symposium on Internet Technologies and Systems - Volume 2
USITS'99 Proceedings of the 2nd conference on USENIX Symposium on Internet Technologies and Systems - Volume 2
Study of piggyback cache validation for proxy caches in the world wide web
USITS'97 Proceedings of the USENIX Symposium on Internet Technologies and Systems on USENIX Symposium on Internet Technologies and Systems
Cost-aware WWW proxy caching algorithms
USITS'97 Proceedings of the USENIX Symposium on Internet Technologies and Systems on USENIX Symposium on Internet Technologies and Systems
Optimistic deltas for WWW latency reduction
ATEC '97 Proceedings of the annual conference on USENIX Annual Technical Conference
Engineering web cache consistency
ACM Transactions on Internet Technology (TOIT)
Proactive caching of DNS records: addressing a performance bottleneck
Computer Networks: The International Journal of Computer and Telecommunications Networking
Web cache optimization with nonlinear model using object features
Computer Networks: The International Journal of Computer and Telecommunications Networking
Consistency models for Internet caching
WISICT '04 Proceedings of the winter international synposium on Information and communication technologies
Optimal Replica Placement under TTL-Based Consistency
IEEE Transactions on Parallel and Distributed Systems
Searching moving objects in a spatio-temporal distributed database servers system
ODBASE'06/OTM'06 Proceedings of the 2006 Confederated international conference on On the Move to Meaningful Internet Systems: CoopIS, DOA, GADA, and ODBASE - Volume Part II
Speculative validation of web objects for further reducing the user-perceived latency
NETWORKING'10 Proceedings of the 9th IFIP TC 6 international conference on Networking
Online result cache invalidation for real-time web search
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
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Web content caches are often placed between end users and origin servers as a mean to reduce server load, network usage, and ultimately, user-perceived latency. Cached objects typically have associated expiration times, after which they are considered stale and must be validated with a remote server (origin or another cache) before they can be sent to a client. A considerable fraction of cache "hits" involve stale copies that turned out to be current. These validations of current objects have small message size, but nonetheless, often induce latency comparable to full-fledged cache misses. Thus, the functionality of caches as a latency-reducing mechanism highly depends not only on content availability but also on its freshness. We propose policies for caches to proactively validate selected objects as they become stale, and thus allow for more client requests to be processed locally. Our policies operate within the existing protocols and exploit natural properties of request patterns such as frequency and recency. We evaluated and compared different policies using trace-based simulations.