Does Hyperledger Fabric have the channels first, then peers have joined the channel?
If the computer that created the channel dies, does that channel die? So what's the difference the central network?
Channels here are similar to the channels you have in messaging applications like slack. You cant have a channel unless you have participants. A channel in hyperledger represents the shared ledger among the parties that are part of the channel.A channel comprises of participatingpeers, if a peer is offline, the channel does not cease to exist. You usually have multiple peers per organisation to ensure fault tolerance.