Node Uptime
How long a Bitcoin node has remained online and synchronized, relevant for network reliability and routing capacity.
Node uptime is how long a Bitcoin node has been running continuously without restart or disconnection.
High uptime is good network citizenship. A long-running node:
- Builds up a richer peer-discovery view (
peers.datand theaddrset), which makes it more resistant to eclipse attacks. - Has a warm mempool. New transactions get validated against an established mempool view, not a cold one.
- Is useful to other peers during their initial sync; it can serve historical blocks immediately.
- Doesn't churn the network with repeated reconnections.
Bitcoin Core doesn't surface uptime as a prominent metric, and there's no leaderboard or reward for keeping a node up. For a regular full node, occasional downtime (minutes or days) is fine; the node just catches up when it comes back.
Uptime matters more for Lightning routing nodes than for plain full nodes. A Lightning channel needs both sides reachable to update, and a frequently-offline routing node will see channels closed by counterparties or fail to forward payments. If you're running a routing node, optimize for uptime; if you're running a full node for your own wallet, don't bother chasing nines.
Key takeaways
- Indicates reliability in relaying and validating blocks/transactions
- Higher uptime fosters a healthier, more robust network
- Server-grade or well-maintained nodes typically aim for near-constant operation