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Anca Zamfir
2019-06-18 11:57:22 +02:00
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19
docs/spec/reactors/pex/pex.md
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@ -21,17 +21,20 @@ inbound (they dialed our public address) or outbound (we dialed them).
## Discovery
Peer discovery begins with a list of seeds.
When we have no peers, or have been unable to find enough peers from existing ones,
we dial a randomly selected seed to get a list of peers to dial.
When we don't have enough peers, we
1. ask existing peers
2. dial seeds if we're not dialing anyone currently
On startup, we will also immediately dial the given list of `persistent_peers`,
and will attempt to maintain persistent connections with them. If the connections die, or we fail to dial,
we will redial every 5s for a few minutes, then switch to an exponential backoff schedule,
and after about a day of trying, stop dialing the peer.
and will attempt to maintain persistent connections with them. If the
connections die, or we fail to dial, we will redial every 5s for a few minutes,
then switch to an exponential backoff schedule, and after about a day of
trying, stop dialing the peer.
So long as we have less than `MaxNumOutboundPeers`, we periodically request additional peers
from each of our own. If sufficient time goes by and we still can't find enough peers,
we try the seeds again.
As long as we have less than `MaxNumOutboundPeers`, we periodically request
additional peers from each of our own and try seeds.
## Listening