NFS Version 4 Minor Version 2
draft-ietf-nfsv4-minorversion2-41

Document Type Active Internet-Draft (nfsv4 WG)
Last updated 2016-02-04 (latest revision 2016-01-28)
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NFSv4                                                          T. Haynes
Internet-Draft                                              Primary Data
Intended status: Standards Track                        January 28, 2016
Expires: July 31, 2016

                     NFS Version 4 Minor Version 2
                 draft-ietf-nfsv4-minorversion2-41.txt

Abstract

   This Internet-Draft describes NFS version 4 minor version two,
   describing the protocol extensions made from NFS version 4 minor
   version 1.  Major extensions introduced in NFS version 4 minor
   version two include: Server Side Copy, Application Input/Output (I/O)
   Advise, Space Reservations, Sparse Files, Application Data Blocks,
   and Labeled NFS.

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 RFC 2119 [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
   Task Force (IETF).  Note that other groups may also distribute
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 31, 2016.

Copyright Notice

   Copyright (c) 2016 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

Haynes                    Expires July 31, 2016                 [Page 1]
Internet-Draft                   NFSv4.2                    January 2016

   (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  . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.1.  Scope of This Document  . . . . . . . . . . . . . . . . .   5
     1.2.  NFSv4.2 Goals . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Overview of NFSv4.2 Features  . . . . . . . . . . . . . .   6
       1.3.1.  Server Side Clone and Copy  . . . . . . . . . . . . .   6
       1.3.2.  Application Input/Output (I/O) Advise . . . . . . . .   6
       1.3.3.  Sparse Files  . . . . . . . . . . . . . . . . . . . .   6
       1.3.4.  Space Reservation . . . . . . . . . . . . . . . . . .   7
       1.3.5.  Application Data Block (ADB) Support  . . . . . . . .   7
       1.3.6.  Labeled NFS . . . . . . . . . . . . . . . . . . . . .   7
       1.3.7.  Layout Enhancements . . . . . . . . . . . . . . . . .   7
     1.4.  Enhancements to Minor Versioning Model  . . . . . . . . .   7
   2.  Minor Versioning  . . . . . . . . . . . . . . . . . . . . . .   8
   3.  pNFS considerations for New Operations  . . . . . . . . . . .   8
     3.1.  Atomicity for ALLOCATE and DEALLOCATE . . . . . . . . . .   9
     3.2.  Sharing of stateids with NFSv4.1  . . . . . . . . . . . .   9
     3.3.  NFSv4.2 as a Storage Protocol in pNFS: the File Layout
           Type  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
       3.3.1.  Operations Sent to NFSv4.2 Data Servers . . . . . . .   9
   4.  Server Side Copy  . . . . . . . . . . . . . . . . . . . . . .   9
     4.1.  Protocol Overview . . . . . . . . . . . . . . . . . . . .  10
       4.1.1.  Copy Operations . . . . . . . . . . . . . . . . . . .  11
       4.1.2.  Requirements for Operations . . . . . . . . . . . . .  11
     4.2.  Requirements for Inter-Server Copy  . . . . . . . . . . .  12
     4.3.  Implementation Considerations . . . . . . . . . . . . . .  13
       4.3.1.  Locking the Files . . . . . . . . . . . . . . . . . .  13
       4.3.2.  Client Caches . . . . . . . . . . . . . . . . . . . .  13
     4.4.  Intra-Server Copy . . . . . . . . . . . . . . . . . . . .  13
     4.5.  Inter-Server Copy . . . . . . . . . . . . . . . . . . . .  15
     4.6.  Server-to-Server Copy Protocol  . . . . . . . . . . . . .  19
       4.6.1.  Considerations on Selecting a Copy Protocol . . . . .  19
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