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A fault-tolerant peer-to-peer replication network
The document discusses a fault-tolerant peer-to-peer replication network that synchronizes files across multiple computers, allowing for data access from various locations. It explains the transition from a client-server model to a decentralized, mesh topology, ensuring each node acts as both a client and server for enhanced reliability. Technologies such as SSH and Unison are highlighted for secure file transfers and synchronization between nodes.
A fault-tolerant peer-to-peer replication network
- 1. A fault-tolerant peer-to-peer replication network Radu Potop Otto Iovanici
- 2. Replication network Syncronizesfiles across computers Data available wherever you go Home Work Remote
- 3. How do youdo it? What we initially wanted to do: C client C S server C C Star topology network
- 4. How do youdo it? But... C ? Bye C ? S ? ? C C What if the server goes down?
- 5. Peer-to-peer Descentralized Eachpeer (node) is both client and server Mesh topology (fully connected)
- 6. Fault tolerant What if a node goes down? The network does not suffer
- 7. Fault tolerant Nodes can be added and removed Particular to our network: permits any file transfer is secure grants ASAP availability of data
- 8. Technology SSH secure network public key authentification private / closed network needs initial configuration
- 9. Technology Unison two-way synchronization 1 2 1,2 1,2 A B A B Sync Result
- 10. Technology Cron Sync every hour Bash script Reads IP list Runs Unison Sync IP list between nodes
- 11. How does itall work? 1 2 A B Step 1 C D 3 4 Node A syncs (in order) to B, C and D
- 12. How does itall work? 1,2,3,4 1,2 A B Step 2 C D 1,2,3 1,2,3,4 Each node syncs to every other node
- 13. Characteristics ASAP availability of data Consistent data across nodes Some overhead Inneficient for large networks
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