ALTO Cost Calendar
Network Working Group S. Randriamasy
Internet-Draft Alcatel-Lucent Bell Labs
Intended status: Standards Track R. Yang
Expires: January 7, 2016 Yale University
July 6, 2015
ALTO Cost Calendar
The goal of Application-Layer Traffic Optimization (ALTO) is to
bridge the gap between network and applications by provisioning
network related information in order to allow applications to make
informed decisions. The present draft extends the ALTO cost
information so as to broaden the decision possibilities of
applications to not only decide 'where' to connect to, but also
'when'. This is useful to applications that need to schedule their
data transfers and connections and have a degree of freedom to do so.
ALTO guidance to schedule application traffic can also efficiently
help for load balancing and resources efficiency. Besides, the ALTO
Cost Calendar also allows to schedule the ALTO requests themselves
and thus save a number of ALTO transactions.
The draft proposes new capabilities and attributes on filtered cost
maps and endpoint costs enabling an ALTO Server to provide "Cost
Calendars". These capabilities are applicable to time-sensitive ALTO
metrics With ALTO Cost Calendars, an ALTO Server exposes ALTO Cost
Values in JSON arrays where each value corresponds to a given time
interval. The time intervals as well as other Calendar attributes
are specified in the IRD and ALTO Server responses.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Randriamasy, et al. Expires January 7, 2016 [Page 1]
Internet-Draft ALTO Cost Calendar July 2015
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 7, 2016.
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Overview of ALTO Cost Calendars . . . . . . . . . . . . . . . 5
2.1. ALTO Cost Calendar information features . . . . . . . . . 5
2.2. ALTO Calendar design characteristics . . . . . . . . . . 6
2.2.1. ALTO Cost Calendar for all cost modes . . . . . . . . 7
2.2.2. Compatibility with legacy ALTO Clients . . . . . . . 7
3. ALTO Calendar specification: IRD extensions . . . . . . . . . 8
3.1. Calendar attributes in the IRD resources capabilities . . 8
3.2. Calendars in a delegate IRD . . . . . . . . . . . . . . . 10
3.3. Example IRD with ALTO Cost Calendars . . . . . . . . . . 10
4. ALTO Calendar specification: Service Information Resources . 14
4.1. Calendar extensions for Filtered Cost Maps . . . . . . . 14
4.1.1. Calendar extensions in Filtered cost map requests . . 15
4.1.2. Calendar extensions in Filtered Cost map responses . 15
Show full document text