A Survey of In-Network Storage Systems
RFC 6392

Internet Engineering Task Force (IETF)                     R. Alimi, Ed.
Request for Comments: 6392                                        Google
Category: Informational                                   A. Rahman, Ed.
ISSN: 2070-1721                         InterDigital Communications, LLC
                                                            Y. Yang, Ed.
                                                         Yale University
                                                            October 2011

                 A Survey of In-Network Storage Systems

Abstract

   This document surveys deployed and experimental in-network storage
   systems and describes their applicability for the DECADE (DECoupled
   Application Data Enroute) architecture.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see 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/rfc6392.

Copyright Notice

   Copyright (c) 2011 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
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   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.

Alimi, et al.                 Informational                     [Page 1]
RFC 6392                      DECADE Survey                 October 2011

Table of Contents

   1. Introduction ....................................................3
   2. Survey Overview .................................................3
      2.1. Terminology and Concepts ...................................3
      2.2. Historical Context .........................................3
   3. In-Network Storage System Components ............................5
      3.1. Data Access Interface ......................................5
      3.2. Data Management Operations .................................5
      3.3. Data Search Capability .....................................6
      3.4. Access Control Authorization ...............................6
      3.5. Resource Control Interface .................................6
      3.6. Discovery Mechanism ........................................7
      3.7. Storage Mode ...............................................7
   4. In-Network Storage Systems ......................................7
      4.1. Amazon S3 ..................................................7
      4.2. BranchCache ................................................9
      4.3. Cache-and-Forward Architecture ............................11
      4.4. Cloud Data Management Interface ...........................12
      4.5. Content Delivery Network ..................................14
      4.6. Delay-Tolerant Network ....................................16
      4.7. Named Data Networking .....................................18
      4.8. Network of Information ....................................19
      4.9. Network Traffic Redundancy Elimination ....................22
      4.10. OceanStore ...............................................23
      4.11. P2P Cache ................................................24
      4.12. Photo Sharing ............................................26
      4.13. Usenet ...................................................28
      4.14. Web Cache ................................................29
      4.15. Observations Regarding In-Network Storage Systems ........31
   5. Storage and Other Related Protocols ............................32
      5.1. HTTP ......................................................32
      5.2. iSCSI .....................................................33
      5.3. NFS .......................................................34
      5.4. OAuth .....................................................36
      5.5. WebDAV ....................................................37
      5.6. Observations Regarding Storage and Related Protocols ......39