D. Li, P. Cao, and M. Dahlin. WCIP: Web Cache Invalidation Protocol. IETF Internet Draft, November 2000.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....from the server to this list. The lease handlers at member proxies are responsible for tracking object popularities and sending lease terminate messages to the leader for cold objects. Server failures and or network partitions can be handled at the leader by exchanging heartbeat messages [18] or by maintaining a persistent TCP connection with the server a broken connection indicates a failure and requires cached objects to be invalidated within # time units. The heartbeat interval should, in this case, be smaller than the notification rate parameter. 5EXPERIMENTAL EVALUATION In ....

....efficiently in web servers and CDN proxies. 6RELATED WORK Recently, several cache consistency mechanisms have been developed for single proxies [4] 5] 7] as argued earlier, these mechanisms do not scale well to proxies in a CDN. Three recent efforts have focused on the issue of scalability [18], 27] 30] We discuss each in turn. A cache consistency mechanism for hierarchical proxy caches was discussed in [30] The approach does not propose a new consistency mechanism, rather it examines issues in instantiating existing approaches into a hierarchical proxy cache using mechanisms such ....

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D. Li, P. Cao, and M. Dahlin, "WCIP: Web Cache Invalidation Protocol," IETF Internet Draft, Nov. 2000.

....from the server to this list. The lease handlers at member proxies are responsible for tracking object popularities and sending lease terminate messages to the leader for cold objects. Server failures and or network partitions can be handled at the leader by exchanging heartbeat messages [18] or by maintaining a persistent TCP connection with the server a broken connection indicates a failure and requires cached objects to be invalidated within # time units. The heartbeat interval should, in this case, be smaller than the notification rate parameter. 5 Experimental Evaluation In ....

....3.36 Renew lease 2.65 Inv. to Proxy 0.565 6 Related Work Recently several cache consistency mechanisms have been developed for single proxies [4, 5, 7] as argued earlier, these mechanisms do not scale well to proxies in a CDN. Three recent efforts have focused on the issue of scalability [18, 27, 30]. We discuss each in turn. A cache consistency mechanism for hierarchical proxy caches was discussed in [30] The approach does not propose a new consistency mechanism, rather it examines issues in instantiating existing approaches into a hierarchical proxy cache using mechanisms such as ....

[Article contains additional citation context not shown here]

D. Li, P. Cao, and M. Dahlin. WCIP: Web Cache Invalidation Protocol. IETF Internet Draft, November 2000.

....from the server to this list. The lease handlers at member proxies are responsible for tracking object popularities and sending lease terminate messages to the leader for cold objects. Server failures and or network partitions can be handled at the leader by exchanging heartbeat messages [16] or by maintaining a persistent TCP connection with the server a broken connection indicates a failure and requires cached objects to be invalidated within time units. The heartbeat interval should, in this case, be smaller than the rate parameter. 5. EXPERIMENTAL EVALUATION In this ....

....efficiently in web servers and CDN proxies. 6. RELATED WORK Recently several cache consistency mechanisms have been developed for single proxies [3, 4, 6] as argued earlier, these mechanisms do not scale well to proxies in a CDN. Three recent efforts have focused on the issue of scalability [16, 23, 26]. We discuss each in turn. A cache consistency mechanism for hierarchical proxy caches was discussed in [26] The approach does not propose a new consistency mechanism, rather it examines issues in instantiating existing approaches into a hierarchical proxy cache using mechanisms such as ....

[Article contains additional citation context not shown here]

D. Li, P. Cao, and M. Dahlin. WCIP: Web Cache Invalidation Protocol. IETF Internet Draft, November 2000.

....Several new protocols have been proposed recently to provide delta and strong consistency using server based invalidations. Web cache invalidation protocol (WCIP) is one such proposal for propagating server invalidations using application level multicast while providing delta consistency [43]. Web content distribution protocol (WCDP) is another proposal that supports multiple consistency levels using a request response protocol that can be scaled to support distribution hierarchies [65] The client driven approach, also referred to as client polling, requires that intermediaries poll ....

D. Li, P. Cao, and M. Dahlin. WCIP: Web Cache Invalidation Protocol. IETF Internet Draft, November 2000.

....the efficiency is always 1. In this study we consider IMS (If Modified Since) messages and regular GET messages due to cache misses, but the technique can be readily applied to other types of messages exchanged between caches and servers, such as those used in the Web Cache Invalidation Protocol [13]. 5.1. IMS and Cache Miss Caches routinely send IMS (If Modified Since) messages to origin servers to query the freshness of objects. The IMS strategy entails piggybacking a report on an IMS message that is already being sent to the server. In the per object IMS strategy, only hits for that ....

D. Li, P. Cao, M. Dahlin. WCIP: Web Cache Invalidation Protocol. Internet Draft <draft-danli-wrec-wcip-01.txt>, March 2001.

....the contents of an object (i.e. they do not see the HTML source of a Web page) the origin server to invalidate the cached objects [LC98] but only recently has this approach been considered for non proprietary networks. Work is underway to develop the Web Cache Invalidation Protocol (WCIP) LCD01] in which Web caches subscribe to invalidation channel(s) corresponding to content in which they are interested. This protocol is intended to allow the caching and distribution of large numbers of frequently changing Web objects with freshness guarantees. Dynamically generated objects are ....

Dan Li, Pei Cao, and M. Dahlin. WCIP: Web cache invalidation protocol. Internet-Draft draft-danli-wrec-wcip-01.txt, IETF, March 2001. Work in progress.

....work. The improved data type model that I have described in this paper has been developed while working on the existing protocol, and on a few extensions that have received a lot of scrutiny. The model should be further tested on additional HTTP extensions (e.g. pending work on coherent caching[22], or the metadata mechanisms used in some CDNs to track the validity or mutability of information) to ensure that it is robust enough to support extensions that I have not considered. One impetus for the improved model was to clarify how compression and byte range selection could be composed. ....

D. Li, P. Cao, and M. Dahlin. WCIP: Web cache invalidation protocol. Internet Draft draft-danli-wrec-wcip-01.txt, IETF, March 2001. This is a work in progress. http://www.ietf.org/internet-drafts/draft-danli-wrec-wcip01. txt.

.... cache related services like CDNs and edge services playing an increasingly signi cant role in the modern internet, the problem of the weak consistency and coherence provisions in current web protocols is becoming increasingly signi cant and drawing the attention of the standards community [LCD01] Toward this end, we present de nitions of consistency and coherence for web like environments, that is, distributed client server information systems where the semantics of interactions with resources are more general than the read write operations found in memory hierarchies and distributed ....

....protocol, HTTP 1. 1 [FGM 99] does not incorporate any non trivial consistency or coherence mechanisms [KR01] although there has been some discussion in the literature about ways of adding this [CL97, KW98, ZY01, LC00] 1 , and there is a current (as of this writing) internet draft [LCD01] which describes how one mechanism could be implemented. This paper is an attempt to examine and address these current weaknesses and issues systematically. We begin with a brief synopsis of research into adding consistency and coherence mechanisms to the web s application protocol suite; ....

[Article contains additional citation context not shown here]

D. Li, P. Cao, and M. Dahlin, Wcip: Web cache invalidation protocol, March 2001, Internet Draft.

....by traditional web caches. Even the current version of the web s foundational protocol, HTTP 1. 1 [FGM 99] does not incorporate any non trivial consistency or coherence mechanisms [KR01] although there has been some discussion in the literature about ways of adding this [CL97, KW98, ZY01, LC00] 1 , and there is a current (as of this writing) internet draft [LCD01] which describes how one mechanism could be implemented. This paper is an attempt to examine and address these current weaknesses and issues systematically. We begin with a brief synopsis of research into adding consistency ....

Dan Li and Pei Cao, WCIP: Web cache invalidation protocol, 5th International Web Caching and Content Delivery Workshop (Lisbon, Portugal), May 2000.

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D. Li, P. Cao, and M. Dahlin. WCIP: Web Cache Invalidation Protocol. IETF Internet Draft, November 2000.

No context found.

Dan Li and Pei Cao. WCIP: Web cache invalidation protocol. In 5th International Web Caching and Content Delivery Workshop, Lisbon, Portugal, May 2000.

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D. Li, P. Cao, and M. Dahlin. WCIP: Web cache invalidation protocol, March 2001. Internet Draft (work in progress) draft-danli-wrec-wcip-01.txt.

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D. Li, P. Cao, and M. Dahlin. WCIP: Web Cache Invalidation Protocol. IETF Internet Draft, November 2000.

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D. Li, P. Cao, and M. Dahlin, "WCIP: Web Cache Invalidation Protocol," IETF Internet draft, work in progress, Mar. 2001.

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