1. Distributed Electronic Mailing System Research & Development: Bercovici Sivan Instructor: Frishman Yaniv

2. Project goals Construct a distributed e-mail system that: Uses Time-Shared StorageUses Time-Shared Storage DecentralizedDecentralized ScalableScalable Fault-tolerantFault-tolerant Optimized (both time and space)Optimized (both time and space) Attack immuneAttack immune Has monitoring abilitiesHas monitoring abilities

3. Classic E-Mail System Design Interne t SMTP Centric design – all communication pass through servers Communication and storage stress on the server Scalability issues Single point of failure Wasteful in term of attachments

4. Architecture Internet Mailboxes travel on online computers Mail is sent directly between participating mailboxes Mobile light servers resolve mailbox references Mobile attachments, sent as links and not copies

5. Features 1.Scalable 2.Communication optimization 3.Server load balancing 4.Fault-tolerant servers (by replication) 5.Self-regenerating client 6.Lazy attachments Based on FarGo infrastructure (Dr. Ben Shaul)

6. System Components Dispatch unit (light-weight server) GUI offers a way to monitor the system activity – online users, mailbox locations and available dispatch units Through this element one can compose a mail and send it directly to another distant mailbox (without going through a server) Mailbox GUI allows a user to review and interact with personal mail items A flexible integrated environment that offers administrative and development tools