Trunking Discovery For Network File System Version 4.1
draft-andros-nfsv4-client-multipath-discovery-00

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Network File System Version 4                                 W. Adamson
Internet-Draft                                                    NetApp
Intended status: Standards Track                           C. Lever, Ed.
Expires: August 13, 2017                                          Oracle
                                                        February 9, 2017

         Trunking Discovery For Network File System Version 4.1
            draft-andros-nfsv4-client-multipath-discovery-00

Abstract

   Connection trunking is the use of multiple transport connections to
   increase data and request throughput between one NFS client and
   server pair.  This document describes a means for an NFS version 4.1
   client to discover NFS version 4.1 server multipath addresses that
   may be used for connection trunking.

Requirements Language

   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 [RFC2119].

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on August 13, 2017.

Copyright Notice

   Copyright (c) 2017 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

Adamson & Lever          Expires August 13, 2017                [Page 1]
Internet-Draft         NFSv4.1 Trunking Discovery          February 2017

   (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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Discovering Multipath Addresses . . . . . . . . . . . . . . .   4
   4.  Trunking Support For Other NFS Versions . . . . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  12
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Multiple transport connections can be established between an NFS
   client and server pair to improve the throughput of RPC operations or
   data transfer.  These connections leverage the bandwidth of multiple
   network paths, potentially making use of more than one network
   interface or execution engine on both the client and server.

   NFS version 4.1 defines two mechanisms for managing multiple
   transport connections between a single client-server pair.
   Section 2.10.5 of [RFC5661] defines "trunking" as the use of multiple
   transport connections to increase the speed of data transfer.
   Chapters 12 and 13 of that document introduce Parallel NFS (pNFS),
   wherein multiple transport connections may be established to pNFS
   Data Servers (DSs).  This document refers to these multiple DS
   connections as "multipathing".

   The NFSv4.1 GETDEVICEINFO operation enables multipathing among
   multiple pNFS Data Server (DS) network addresses.  As noted in
   Section 13.5 of [RFC5661], if multiple network addresses appear in a
   multipath list, they designate the same Data Server.  Given a such a
   list of multipath addresses, a client tests further for trunking
   support by sending an EXCHANGE_ID operation to each address in a
   multipath list and comparing the results.

   The NFS version 4.1 protocol does not specify a similar means for an
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