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A fault-tolerant peer-to-peer replication network

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Radu Potop
Radu Potop

The paper can be read at: http://wooptoo.com/papers/A_Fault_Tolerant_Peer-To-Peer_Replication_Network.pdf

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A fault-tolerant peer-to-peer replication network Radu Potop Otto Iovanici
Replication network Syncronizes files across computers Data available wherever you go Home Work Remote
How do you do it? What we initially wanted to do: C client C S server C C Star topology network
How do you do it? But... C ? Bye C ? S ? ? C C What if the server goes down?
Peer-to-peer Descentralized Each peer (node) is both client and server Mesh topology (fully connected)
Fault tolerant What if a node goes down? The network does not suffer
Fault tolerant Nodes can be added and removed Particular to our network: permits any file transfer is secure grants ASAP availability of data
Technology SSH secure network public key authentification private / closed network needs initial configuration
Technology Unison two-way synchronization 1 2 1,2 1,2 A B A B Sync Result
Technology Cron Sync every hour Bash script Reads IP list Runs Unison Sync IP list between nodes
How does it all work? 1 2 A B Step 1 C D 3 4 Node A syncs (in order) to B, C and D
How does it all 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
Characteristics ASAP availability of data Consistent data across nodes Some overhead Inneficient for large networks
Demonstration
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A fault-tolerant peer-to-peer replication network

  • 1. A fault-tolerant peer-to-peer replication network Radu Potop Otto Iovanici
  • 2. Replication network Syncronizes files across computers Data available wherever you go Home Work Remote
  • 3. How do you do it? What we initially wanted to do: C client C S server C C Star topology network
  • 4. How do you do it? But... C ? Bye C ? S ? ? C C What if the server goes down?
  • 5. Peer-to-peer Descentralized Each peer (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 it all work? 1 2 A B Step 1 C D 3 4 Node A syncs (in order) to B, C and D
  • 12. How does it all 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