[alto] TR: New Version Notification for draft-randriamasy-alto-multi-cost-10.txt
"RANDRIAMASY, SABINE (SABINE)" <sabine.randriamasy@alcatel-lucent.com> Fri, 13 March 2015 13:46 UTC
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From: "RANDRIAMASY, SABINE (SABINE)" <sabine.randriamasy@alcatel-lucent.com>
To: IETF ALTO <alto@ietf.org>
Thread-Topic: New Version Notification for draft-randriamasy-alto-multi-cost-10.txt
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Date: Fri, 13 Mar 2015 13:46:40 +0000
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Subject: [alto] TR: New Version Notification for draft-randriamasy-alto-multi-cost-10.txt
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Hi all, We have posted a new version of the Multi-Cost ALTO extension proposal. This update aims at minimizing the number of protocol updates needed to support Multi-Cost ALTO Services. Our intent is to gauge the dispositions of this draft with respect to being a WG item. Please see our summary below. Any feedback and comments on the draft is welcome. Thanks, Sabine and Wendy In a nutshell, the Multi-Cost (MC) ALTO extension: - allows to carry multiple cost metrics in a single ALTO request or response, - allows to combine 'AND' and 'OR' logical operators on constraints, allowing requests such as for example "give me costs among {those PIDs/Endpoints} that satisfy 'hopcount' = 0 OR routingcost in [5, 10]" - proposes additional abstracted TE-related Cost metrics to score resources availabilities Applicable service information resources are: Cost Map (CM), Filtered Cost Map (FCM), Endpoint Cost Map (ECM) The updates proposed in the MC ALTO draft: - stay with the same media types for MC service information resources - the following fields are added: Capability fields: multi-cost-type-names: Array of cost type names. Presence means this resource can return a multi-cost. A filtered cost map resource can have either cost-type-names or multi-cost-type-names or both. Former means it can return a single cost, latter a multi cost. Client selects which. A full cost map resource has cost-type-names or multi-cost-type-names, but not both. Former means it returns a single cost, latter means it returns a multi cost. Since it is get-mode, the resource returns what it returns; the client has no choice. testable-cost-types: Array of cost-type names that can be used in Multi- Cost and Logical Operator (MCLO) constraints. Presence means this resource supports MCLO constraints. Server response fields: multi-cost-types: Used in meta of multi-cost response, instead of cost-type. An array of cost-types, in the order in which they appear in the multi-cost array. Client request fields: multi-cost-types: For multi-cost aware filtered cost map resources, to get a multi-cost response, client provides multi-cost-types, instead of cost-types, with an array of cost-types in the order in which the server should return them. >>-----Message d'origine----- >>De : internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] >>Envoyé : lundi 9 mars 2015 20:21 >>À : Nico Schwan; RANDRIAMASY, SABINE (SABINE); RANDRIAMASY, SABINE >>(SABINE); ROOME, Wendy D (Wendy); Nico Schwan; ROOME, Wendy D (Wendy) >>Objet : New Version Notification for draft-randriamasy-alto-multi-cost- >>10.txt >> >> >>A new version of I-D, draft-randriamasy-alto-multi-cost-10.txt >>has been successfully submitted by Sabine Randriamasy and posted to the >>IETF repository. >> >>Name: draft-randriamasy-alto-multi-cost >>Revision: 10 >>Title: Multi-Cost ALTO >>Document date: 2015-03-09 >>Group: Individual Submission >>Pages: 37 >>URL: http://www.ietf.org/internet-drafts/draft-randriamasy- >>alto-multi-cost-10.txt >>Status: https://datatracker.ietf.org/doc/draft-randriamasy- >>alto-multi-cost/ >>Htmlized: http://tools.ietf.org/html/draft-randriamasy-alto- >>multi-cost-10 >>Diff: http://www.ietf.org/rfcdiff?url2=draft-randriamasy- >>alto-multi-cost-10 >> >>Abstract: >> IETF is designing a new service called ALTO (Application Layer >> traffic Optimization) that includes a "Network Map Service", an >> "Endpoint Cost Service" and an "Endpoint (EP) Ranking Service" and >> thus incentives for application clients to connect to ISP preferred >> Endpoints. These services provide a view of the Network Provider >> (NP) topology to overlay clients. >> >> The present draft proposes a simple way to extend the information >> provided by the current ALTO protocol in two ways. First, including >> information on multiple Cost Types in a single ALTO transaction >> provides a better mapping of the Selected Endpoints to needs of the >> growing diversity of Content and Resources Networking Applications >> and to the network conditions. Second, one ALTO query and response >> exchange on N Cost Types is faster and more efficient than N single >> cost transactions. All this also helps producing a faster and more >> robust choice when multiple Endpoints need to be selected. Last, >>the >> draft proposes to enrich the filtering capabilities by allowing >> constraints involving several metrics combined by several types of >> logical operators. This allows the applications to set finer >> requirements and above all to include compromises on those >> requirements. >> >> >> >> >> >>Please note that it may take a couple of minutes from the time of >>submission until the htmlized version and diff are available at >>tools.ietf.org. >> >>The IETF Secretariat
- [alto] TR: New Version Notification for draft-ran… RANDRIAMASY, SABINE (SABINE)