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
Dhruv Dhody
Sabine Randriamasy
Luis Miguel Contreras
Filename : draft-ietf-alto-performance-metrics-09.txt
Pages : 27
Date : 2020-03-09
Abstract:
Cost metric is a basic concept in Application-Layer Traffic
Optimization (ALTO), and is used in basic ALTO services including
both the cost map service and the endpoint cost service.
Different applications may use different cost metrics, but the ALTO
base protocol [RFC7285] documents only one single cost metric, i.e.,
the generic "routingcost" metric; see Sec. 14.2 of [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.
When using an ALTO performance metric, an application may need
additional contextual information beyond the metric value. For
example, whether the metric is an estimation based on measurements or
a service-level agreement (SLA) can define the meaning of a
performance metric. Hence, this document introduces an additional
"cost-context" field to the ALTO "cost-type" field to convey such
information. 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-09
https://datatracker.ietf.org/doc/html/draft-ietf-alto-performance-metrics-09
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https://www.ietf.org/rfcdiff?url2=draft-ietf-alto-performance-metrics-09
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