$Cambridge: hermes/doc/talks/2003-11-cyrus/Overview,v 1.7 2003/11/19 12:15:45 dpc22 Exp $

Overview of Talk

Existing Hermes System
  Diagram
  Problems with the Design
  Load on Hermes            (XXX Need this? Really just to show telnet decline)

Objectives for New System

Eliminating NFS

Possible directions.

Cyrus History

Cyrus Overview
  Design         (Several slides?)
  Namespaces     (need this to explain why altnamespace important inovation)
  Shared Folders (single slide: illustrate Cyrus Murder, reason for own proxy)

Cyrus Mailbox structure                 (XXX Drop this section?)
  Single slide showing message layout
  Single slide explaining cyrus. files
  Ancillary Databases.
  Sieve Filtering

Problems with the vanilla Cyrus design

Customisations: Introduction

Performance
  Cache Most
  Lazy Cache
  Fast rename     (XXX Drop this?)
  
Compatibility
  Directory
  Unix Namespace

Two phase expunge
  Concept
  Operation
  Tunables
  User Interface  

Replication
  Possible Approaches
  Synchronous Verus Asynchronous Replication
  Applications

Miscelleaneous.   (XXX Drop this?)

Implementation
  Diagram
  List of hardware (& disk capacity)
  Linux filesystems
  SCSI vs SATA?

Migration       (XXX Write this bit)
  Method. Problem cases
  Schedule

Still to do