4 ms·

Those are probably 'full nodes' to participate in the network as a miner or casual user you don't need to run a full node.

• sliverstorm 12y ago
  Yeah, but if there are just 8,000 nodes, suddenly it seems like it wouldn't be all that hard to hijack the network. It's possible I misunderstand, and overestimate the value of full nodes.
  • VMG 12y ago
    You're basically right though, there are regular calls on /r/bitcoin for people to run a full node because the number has gone down recently. I decided set one up on my dedicated host due to one of these.
    • lifeisstillgood 12y ago
      Interesting - I have been meaning to look into how the blockchain works (I missed the get-rich-quick rush and dismissed it all until heard Andreessen explain the reasons) Anyway - what does being a full node entail?
      • jnbiche 12y ago
        Simply run bitcoin-qt or bitcoind all the time and make sure that you have port 8333 open to the outside world (if you have a router, this usually means forwarding 8333). It takes a few hours to a half day for the node to catch up, depending on your bandwidth and CPU, but after that it requires relatively little processing time. But you do need ~20 GB of free hard drive space for the blockchain.
  • thelamest 12y ago
    Non-mining nodes just hold and relay validated blocks, they don't do anything that can be hijacked.
    • servowire 12y ago
      Full nodes host the memory pool for the txid's - So they serve a purpose: Making transactions propagate over the network. And serve blocks to nodes that are not up-to-date (And clients).