Specifications

This section contains various attempts at writing detailed specifications of the data formats used by Tahoe.

• Specification Document Outline
  • #1: Share Format, Encoding Algorithm
  • #2: Share Exchange Protocol
  • #3: Server Selection Algorithm, filecap format
  • #4: Directory Format
• URLs
  • Background
  • NURLs
  • Syntax
  • Versions
  • Version 0
  • Version 1
  • Open Questions
• Tahoe URIs
  • File URIs
  • Directory URIs
  • Internal Usage of URIs
• File Encoding
  • Hashes
• URI Extension Block
• Mutable Files
  • Mutable Formats
  • Consistency vs. Availability
  • The Prime Coordination Directive: “Don’t Do That”
  • Small Distributed Mutable Files
  • Medium Distributed Mutable Files
  • Large Distributed Mutable Files
  • TODO
• Tahoe-LAFS Directory Nodes
  • Key-value Store Primitives
  • File Store Goals
  • Dirnode Goals
  • Dirnode secret values
  • Dirnode storage format
  • Dirnode sizes, mutable-file initial read sizes
  • Design Goals, redux
  • Starting Points: root dirnodes
  • Mounting and Sharing Directories
  • Revocation
• Share Leases
  • Renewal Secrets
  • Cancel Secrets
• Servers of Happiness
  • Measuring Servers of Happiness
  • Issues
• Upload Strategy of Happiness
  • Calculating Share Placements
  • Properties of Upload Strategy of Happiness
• Redundant Array of Independent Clouds: Share To Cloud Mapping
  • Introduction
  • Terminology
  • Functional Requirements
  • Mapping
  • Costs
  • Structure of Implementation
  • Known Issues
  • References
• Storage Node Protocol (“Great Black Swamp”, “GBS”)
  • Glossary
  • Motivation
  • Design Requirements
  • Functionality
  • Solutions
  • Server Details
  • Immutable
  • Mutable
  • Sample Interactions