Namespace Database (NSDB) Protocol for Federated File Systems
RFC 7532
Internet Engineering Task Force (IETF) J. Lentini
Request for Comments: 7532 NetApp
Category: Standards Track R. Tewari
ISSN: 2070-1721 IBM Almaden
C. Lever, Ed.
Oracle Corporation
March 2015
Namespace Database (NSDB) Protocol for Federated File Systems
Abstract
This document describes a file system federation protocol that
enables file access and namespace traversal across collections of
independently administered fileservers. The protocol specifies a set
of interfaces by which fileservers with different administrators can
form a fileserver federation that provides a namespace composed of
the file systems physically hosted on and exported by the constituent
fileservers.
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/rfc7532.
Lentini, et al. Standards Track [Page 1]
RFC 7532 NSDB Protocol for Federated File Systems March 2015
Copyright Notice
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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.
Lentini, et al. Standards Track [Page 2]
RFC 7532 NSDB Protocol for Federated File Systems March 2015
Table of Contents
1. Introduction ....................................................4
1.1. Requirements Language ......................................5
2. Overview of Features and Concepts ...............................5
2.1. File-Access Protocol .......................................5
2.2. File-Access Client .........................................5
2.3. Fileserver .................................................5
2.4. Referral ...................................................5
2.5. Namespace ..................................................6
2.6. Fileset ....................................................6
2.7. Fileset Name (FSN) .........................................6
2.8. Fileset Location (FSL) .....................................7
2.8.1. The NFS URI Scheme ..................................8
2.8.2. Mutual Consistency across Fileset Locations ........10
2.8.3. Caching of Fileset Locations .......................11
2.8.4. Generating a Referral from Fileset Locations .......12
2.9. Namespace Database (NSDB) .................................13
2.9.1. NSDB Client ........................................14
2.10. Junctions and Referrals ..................................14
2.11. Unified Namespace and the Root Fileset ...................15
2.12. UUID Considerations ......................................15
3. Examples .......................................................16
3.1. Creating a Fileset and Its FSL(s) .........................16
3.1.1. Creating a Fileset and an FSN ......................17
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