Network File System (NFS) Direct Data Placement
RFC 5667
| Document | Type |
RFC - Proposed Standard
(January 2010; No errata)
Obsoleted by RFC 8267
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5667 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Lars Eggert | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) T. Talpey
Request for Comments: 5667 Unaffiliated
Category: Standards Track B. Callaghan
ISSN: 2070-1721 Apple
January 2010
Network File System (NFS) Direct Data Placement
Abstract
This document defines the bindings of the various Network File System
(NFS) versions to the Remote Direct Memory Access (RDMA) operations
supported by the RPC/RDMA transport protocol. It describes the use
of direct data placement by means of server-initiated RDMA operations
into client-supplied buffers for implementations of NFS versions 2,
3, 4, and 4.1 over such an RDMA transport.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc5667.
Copyright Notice
Copyright (c) 2010 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.
Talpey & Callaghan Standards Track [Page 1]
RFC 5667 NFS Direct Data Placement January 2010
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction ....................................................2
1.1. Requirements Language ......................................2
2. Transfers from NFS Client to NFS Server .........................3
3. Transfers from NFS Server to NFS Client .........................3
4. NFS Versions 2 and 3 Mapping ....................................4
5. NFS Version 4 Mapping ...........................................6
5.1. NFS Version 4 Callbacks ....................................7
6. Port Usage Considerations .......................................8
7. Security Considerations .........................................9
8. Acknowledgments .................................................9
9. References ......................................................9
9.1. Normative References .......................................9
9.2. Informative References ....................................10
1. Introduction
The Remote Direct Memory Access (RDMA) Transport for Remote Procedure
Call (RPC) [RFC5666] allows an RPC client application to post buffers
in a Chunk list for specific arguments and results from an RPC call.
The RDMA transport header conveys this list of client buffer
addresses to the server where the application can associate them with
client data and use RDMA operations to transfer the results directly
to and from the posted buffers on the client. The client and server
must agree on a consistent mapping of posted buffers to RPC. This
document details the mapping for each version of the NFS protocol
[RFC1094] [RFC1813] [RFC3530] [RFC5661].
1.1. 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].
Talpey & Callaghan Standards Track [Page 2]
RFC 5667 NFS Direct Data Placement January 2010
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