dedups gossip addresses, taking the one with highest weight (#29421)
dedups gossip addresses, keeping only the one with the highest weight In order to avoid traffic congestion or sending duplicate packets, when sampling gossip nodes if several nodes have the same gossip address (because they are behind a relayer or whatever), they need to be deduplicated into one.
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@ -112,7 +112,9 @@ impl ContactInfo {
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let delay = 10 * 60 * 1000; // 10 minutes
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let now = timestamp() - delay + rng.gen_range(0, 2 * delay);
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let pubkey = pubkey.unwrap_or_else(solana_sdk::pubkey::new_rand);
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ContactInfo::new_localhost(&pubkey, now)
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let mut node = ContactInfo::new_localhost(&pubkey, now);
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node.gossip.set_port(rng.gen_range(1024, u16::MAX));
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node
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}
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#[cfg(test)]
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@ -17,6 +17,7 @@ use {
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duplicate_shred::{self, DuplicateShredIndex, LeaderScheduleFn, MAX_DUPLICATE_SHREDS},
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ping_pong::PingCache,
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},
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itertools::Itertools,
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rayon::ThreadPool,
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solana_ledger::shred::Shred,
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solana_sdk::{
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@ -353,6 +354,22 @@ pub fn get_weight(max_weight: f32, time_since_last_selected: u32, stake: f32) ->
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1.0_f32.max(weight.min(max_weight))
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}
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// Dedups gossip addresses, keeping only the one with the highest weight.
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pub(crate) fn dedup_gossip_addresses<I, T: PartialOrd>(
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nodes: I,
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) -> HashMap</*gossip:*/ SocketAddr, (/*weight:*/ T, ContactInfo)>
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where
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I: IntoIterator<Item = (/*weight:*/ T, ContactInfo)>,
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{
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nodes
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.into_iter()
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.into_grouping_map_by(|(_weight, node)| node.gossip)
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.aggregate(|acc, _node_gossip, (weight, node)| match acc {
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Some((ref w, _)) if w >= &weight => acc,
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Some(_) | None => Some((weight, node)),
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})
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}
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#[cfg(test)]
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mod test {
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use {
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@ -17,7 +17,7 @@ use {
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cluster_info_metrics::GossipStats,
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contact_info::ContactInfo,
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crds::{Crds, GossipRoute, VersionedCrdsValue},
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crds_gossip::{get_stake, get_weight},
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crds_gossip::{self, get_stake, get_weight},
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crds_gossip_error::CrdsGossipError,
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crds_value::CrdsValue,
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ping_pong::PingCache,
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@ -244,22 +244,25 @@ impl CrdsGossipPull {
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);
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// Check for nodes which have responded to ping messages.
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let mut rng = rand::thread_rng();
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let (weights, peers): (Vec<_>, Vec<_>) = {
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let peers: Vec<_> = {
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let mut ping_cache = ping_cache.lock().unwrap();
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let mut pingf = move || Ping::new_rand(&mut rng, self_keypair).ok();
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let now = Instant::now();
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peers
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.into_iter()
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.filter_map(|(weight, peer)| {
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.filter(|(_weight, peer)| {
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let node = (peer.id, peer.gossip);
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let (check, ping) = ping_cache.check(now, node, &mut pingf);
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if let Some(ping) = ping {
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pings.push((peer.gossip, ping));
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}
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check.then_some((weight, peer))
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check
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})
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.unzip()
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.collect()
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};
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let (weights, peers): (Vec<_>, Vec<_>) = crds_gossip::dedup_gossip_addresses(peers)
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.into_values()
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.unzip();
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if peers.is_empty() {
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return Err(CrdsGossipError::NoPeers);
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}
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@ -16,7 +16,7 @@ use {
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cluster_info::{Ping, CRDS_UNIQUE_PUBKEY_CAPACITY},
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contact_info::ContactInfo,
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crds::{Crds, CrdsError, Cursor, GossipRoute},
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crds_gossip::{get_stake, get_weight},
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crds_gossip::{self, get_stake, get_weight},
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crds_value::CrdsValue,
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ping_pong::PingCache,
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received_cache::ReceivedCache,
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@ -299,22 +299,26 @@ impl CrdsGossipPush {
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socket_addr_space,
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);
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// Check for nodes which have responded to ping messages.
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let (weights, peers): (Vec<_>, Vec<_>) = {
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let peers: Vec<_> = {
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let mut ping_cache = ping_cache.lock().unwrap();
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let mut pingf = move || Ping::new_rand(&mut rng, self_keypair).ok();
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let now = Instant::now();
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peers
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.into_iter()
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.filter_map(|(weight, peer)| {
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.filter(|(_weight, peer)| {
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let node = (peer.id, peer.gossip);
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let (check, ping) = ping_cache.check(now, node, &mut pingf);
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if let Some(ping) = ping {
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pings.push((peer.gossip, ping));
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}
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check.then_some((weight, peer.id))
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check
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})
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.unzip()
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.collect()
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};
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let (weights, peers): (Vec<_>, Vec<_>) = crds_gossip::dedup_gossip_addresses(peers)
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.into_values()
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.map(|(weight, node)| (weight, node.id))
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.unzip();
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if peers.is_empty() {
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return;
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}
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@ -572,7 +576,8 @@ mod tests {
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let active_set = push.active_set.read().unwrap();
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assert!(active_set.get(&value1.label().pubkey()).is_some());
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let value2 = ContactInfo::new_localhost(&solana_sdk::pubkey::new_rand(), 0);
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let mut value2 = ContactInfo::new_localhost(&solana_sdk::pubkey::new_rand(), 0);
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value2.gossip.set_port(1245);
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ping_cache
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.lock()
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.unwrap()
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@ -608,8 +613,9 @@ mod tests {
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let active_set = push.active_set.read().unwrap();
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assert!(active_set.get(&value2.label().pubkey()).is_some());
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}
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for _ in 0..push.num_active {
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let value2 = ContactInfo::new_localhost(&solana_sdk::pubkey::new_rand(), 0);
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for k in 0..push.num_active {
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let mut value2 = ContactInfo::new_localhost(&solana_sdk::pubkey::new_rand(), 0);
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value2.gossip.set_port(1246 + k as u16);
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ping_cache
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.lock()
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.unwrap()
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@ -148,7 +148,8 @@ impl CrdsData {
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// the mainnet crds table.
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match kind {
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0 => CrdsData::ContactInfo(ContactInfo::new_rand(rng, pubkey)),
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1 => CrdsData::LowestSlot(rng.gen(), LowestSlot::new_rand(rng, pubkey)),
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// Index for LowestSlot is deprecated and should be zero.
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1 => CrdsData::LowestSlot(0, LowestSlot::new_rand(rng, pubkey)),
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2 => CrdsData::SnapshotHashes(SnapshotHashes::new_rand(rng, pubkey)),
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3 => CrdsData::AccountsHashes(SnapshotHashes::new_rand(rng, pubkey)),
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4 => CrdsData::Version(Version::new_rand(rng, pubkey)),
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@ -864,7 +865,7 @@ mod test {
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let index = rng.gen_range(0, keys.len());
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CrdsValue::new_rand(&mut rng, Some(&keys[index]))
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})
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.take(2048)
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.take(1 << 12)
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.collect();
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let mut currents = HashMap::new();
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for value in filter_current(&values) {
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@ -888,10 +889,12 @@ mod test {
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}
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}
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assert_eq!(count, currents.len());
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// Currently CrdsData::new_rand is only implemented for 5 different
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// kinds and excludes EpochSlots, and so the unique labels cannot be
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// more than (5 + MAX_VOTES) times number of keys.
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assert!(currents.len() <= keys.len() * (5 + MAX_VOTES as usize));
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// Currently CrdsData::new_rand is implemented for:
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// AccountsHashes, ContactInfo, LowestSlot, SnapshotHashes, Version
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// EpochSlots x MAX_EPOCH_SLOTS
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// Vote x MAX_VOTES
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let num_kinds = 5 + MAX_VOTES as usize + MAX_EPOCH_SLOTS as usize;
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assert!(currents.len() <= keys.len() * num_kinds);
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}
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#[test]
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