A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Application-Layer Traffic Optimization of the
Title : Multi-Cost ALTO
Authors : Sabine Randriamasy
Filename : draft-ietf-alto-multi-cost-04.txt
Pages : 30
Date : 2016-09-15
The ALTO (Application Layer-Traffic Optimization) Protocol
([RFC7285]) defines several services that return various metrics
describing the costs between network endpoints. An ALTO Server may
offer a variety of cost metrics, based on latency,bandwidth, hop
count, jitter, or whatever else the ALTO Server deems useful. For
example, when downloading a file that is mirrored on several sites, a
user application may consider more than one metric, perhaps trading
bandwidth for latency to determine the most efficient mirror site.
While the base ALTO Protocol allows an ALTO Client to use more than
one cost metric, to do so, the Client must request each metric
separately. This document defines a new service that allows a Client
to retrieve several cost metrics with one request, which is
considerably more efficient. In addition, this document extends the
ALTO constraint tests to allow a user to specify an arbitrary logical
combination of tests on several cost metrics.
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