Gnutella

Gnutella

1. The organisation of files and peers AND the search are very efficient and scale up well.

2. Gnutella is a protocol for distributed search

   • TTL = 7 hops

3. Decentralised model

4. Each servent is both a client and a server.

5. Search

   • Searching in gnutella involves broadcasting a QUERY message to all connected peers. 
   • Each connected peer will relay it to their connected peers and so on.
   • Typically this search will run 7 hoops.

6. Gnutella descriptors

   • 1. PING
     • Used to actively discover hosts on the network
   • 2. PONG
     • the response to a Ping.
   • 3. QUERY
     • The primary mechanism for searching the distributed network.
   • 4. QUERYHIT
     • The response to a Query: contains IP address, GUID and search results
   • 5. PUSH
     • Allows downloading from firewalled servents