File-Like ICN Collection (FLIC)
draft-tschudin-icnrg-flic-00

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ICNRG Working Group                                          C. Tschudin
Internet-Draft                                       University of Basel
Intended status: Informational                                   C. Wood
Expires: October 6, 2016                                      PARC, Inc.
                                                          April 04, 2016

                    File-Like ICN Collection (FLIC)
                      draft-tschudin-icnrg-flic-00

Abstract

   This document describes a bare bones "index table"-approach for
   organizing a set of ICN data objects into a large, File-Like ICN
   Collection (FLIC).

   At the core of this collection is a so called manifest which acts as
   the collection's root node.  The manifest contains an index table
   with pointers, each pointer being a hash value pointing to either a
   final data block or another index table node.

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   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
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   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  FLIC as a Distributed Data Structure  . . . . . . . . . .   2
     1.2.  Design goals  . . . . . . . . . . . . . . . . . . . . . .   3
   2.  File-Like ICN Collection (FLIC) Format  . . . . . . . . . . .   4
     2.1.  Use of hash-valued pointers . . . . . . . . . . . . . . .   4
     2.2.  Creating a FLIC data structure  . . . . . . . . . . . . .   5
     2.3.  Reconstructing the collection's data  . . . . . . . . . .   6
     2.4.  Metadata in HashGroups  . . . . . . . . . . . . . . . . .   7
     2.5.  Locating FLIC leaf and manifest nodes . . . . . . . . . .   8
   3.  Advanced uses of FLIC manifests . . . . . . . . . . . . . . .   9
     3.1.  Seeking . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Block-level de-duplification  . . . . . . . . . . . . . .  10
     3.3.  Growing ICN collections . . . . . . . . . . . . . . . . .  10
     3.4.  Re-publishing a FLIC under a new name . . . . . . . . . .  11
     3.5.  Data Chunks of variable size  . . . . . . . . . . . . . .  11
   4.  Encoding  . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     4.1.  Encoding for CCNx1.0  . . . . . . . . . . . . . . . . . .  12
     4.2.  Encoding for NDN  . . . . . . . . . . . . . . . . . . . .  12
     5.1.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

1.1.  FLIC as a Distributed Data Structure

   One figure

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                            root manifest
    .------------------------------------.
    | optional name:                     |
    |   /icn/name/of/this/flic           |
    |                                    |
    | HashGroup (HG):                    |
    |   optional metadata:               |
    |     data size, entry size          |
    |     overall digest, locator, etc.  |    .------.
    |   hash-valued data pointer -----------> | data |
    |     ...                            |    `------'  sub manifest
    |   hash-valued manifest pointer ------.     .------------------.
    |                                    |  `--> |                ----->
    | optional additional HashGroups ..  |       |                ----->
    |                                    |       `------------------'
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