Support for Data Reduction Attributes in nfsv4 Version 2
draft-faibish-nfsv4-data-reduction-attributes-03

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Last updated 2020-06-24
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Network File System Version 4                                 S. Faibish
Internet-Draft                                                P. Shilane
Intended status: Informational                                  Dell EMC
Expires: December 24, 2020                                 June 24, 2020
                                                           
                          

    Support for Data Reduction Attributes in nfsv4 Version 2
        draft-faibish-nfsv4-data-reduction-attributes-03

Abstract

   This document proposes extending NFSv4 operations to add new 
   RECOMMENDED attributes to be used in the protocol to provide 
   information about the data reduction properties of files. The new 
   data reduction attributes are proposed to allow the client 
   application to communicate to the NFSv4 server data reduction 
   attributes associated with files and directories using new metadata, 
   communicated to the Block Storage data reduction engines. 
   Corresponding new RECOMMENDED attributes are proposed to allow 
   clients and client applications to query the server for data 
   reduction attributes support and allow to get and set data reduction
   attributes on files and directories. Such data reduction 
   metadata is used as hints to the file server about what type of data 
   reduction to apply. The proposed data reduction attributes include 
   achievable ratios for compression and deduplication plus whether 
   each data reduction technique applies to a file or directory.       

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   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Faibish                Expires December 24, 2020                [Page 1]
Internet-Draft      Data Reduction Attributes in NFSv4        June 2020 

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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3. New RECOMMENDED attributes  . . . . . . . . . . . . . . . . .   8
   4. File System Support . . . . . . . . . . . . . . . . . . . . .   9
   5. Namespaces  . . . . . . . . . . . . . . . . . . . . . . . . .   9
   6. Data Reduction RECOMMENDED attributes . . . . . . . . . . . .  10
   7. Protocol Enhancements . . . . . . . . . . . . . . . . . . . .  11
   8. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
   9. Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   10.  References  . . . . . . . . . . . . . . . . . . . . . . . .  11
        10.1. Normative References  . . . . . . . . . . . . . . . .  11
        10.2  Informative References . . . . . . . . . . . . . . . . 12
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 12
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . . 12

1. Introduction

   Many NFS servers use expensive solid state media, e.g., NVMe SSDs, 
   complemented by data reduction processing of files to reduce their 
   size on the Block Storage via compression and deduplication, thereby 
   optimizing media usage. This draft considers scenarios in which 
   data reduction processing is performed in Block Storage for NFS 
   servers, i.e., compression and deduplication processing occurs in 
   the background or inline as a consequence of NFS files being 
   written to the Block Storage. In these scenarios, the data reduction 
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