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 WG of
the IETF.
Title : ALTO Performance Cost Metrics
Authors : Qin Wu
Y. Richard Yang
Young Lee
Dhruv Dhody
Sabine Randriamasy
Filename : draft-ietf-alto-performance-metrics-08.txt
Pages : 29
Date : 2019-11-04
Abstract:
Cost metric is a basic concept in Application-Layer Traffic
Optimization (ALTO), and is used in basic services including both the
cost map service and the endpoint cost service.
Different applications may use different cost metrics, but the ALTO
base protocol documents only one single cost metric, i.e., the
generic "routingcost" metric; see Sec. 14.2 of ALTO base
specification [RFC7285]. Hence, if the resource consumer of an
application prefers a resource provider that offers low-delay
delivery to the resource consumer, the base protocol does not define
the cost metric to be used.
ALTO cost metrics can be generic metrics and this document focuses on
network performance metrics, including network delay, jitter, packet
loss, hop count, and bandwidth. Additional cost metrics may be
documented in other documents.
When using an ALTO performance metric, applications need additional
information beyond the metric. In particular, its "cost-source",
such as it being an estimation or an SLA, is key to define the
meaning of a performance metric. Hence, each ALTO performance metric
should include the "cost-source" of the metric. To report an
estimated value of a performance metric, the ALTO server may derive
and aggregate from routing protocols with different granularity and
scope, such as BGP-LS, OSPF-TE and ISIS-TE, or from end-to-end
traffic management tools. These metrics may then be exposed by an
ALTO Server to allow applications to determine "where" to connect
based on network performance criteria.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-alto-performance-metrics/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-alto-performance-metrics-08
https://datatracker.ietf.org/doc/html/draft-ietf-alto-performance-metrics-08
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https://www.ietf.org/rfcdiff?url2=draft-ietf-alto-performance-metrics-08
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