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DHT routing table tuning

This commit is contained in:
Arvid Norberg 2010-12-12 19:18:23 +00:00
parent 87c39fe3f6
commit cc22aca981
1 changed files with 17 additions and 4 deletions
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21
src/kademlia/routing_table.cpp
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@ -179,6 +179,14 @@ void routing_table::touch_bucket(node_id const& target)
i->last_active = time_now();
}
// returns true if lhs is in more need of a refresh than rhs
bool compare_bucket_refresh(routing_table_node const& lhs, routing_table_node const& rhs)
{
// add the number of nodes to prioritize buckets with few nodes in them
return lhs.last_active + seconds(lhs.live_nodes.size())
< rhs.last_active + seconds(rhs.live_nodes.size());
}
bool routing_table::need_refresh(node_id& target) const
{
ptime now = time_now();
@ -188,14 +196,16 @@ bool routing_table::need_refresh(node_id& target) const
{
m_last_self_refresh = now;
target = m_id;
#ifdef TORRENT_DHT_VERBOSE_LOGGING
TORRENT_LOG(table) << "need_refresh [ bucket: self target: " << target << " ]";
#endif
return true;
}
if (m_buckets.empty()) return false;
table_t::const_iterator i = std::min_element(m_buckets.begin(), m_buckets.end()
, boost::bind(&routing_table_node::last_active, _1)
< boost::bind(&routing_table_node::last_active, _2));
, &compare_bucket_refresh);
if (now - i->last_active < minutes(15)) return false;
if (now - m_last_refresh < seconds(45)) return false;
@ -246,7 +256,8 @@ routing_table::table_t::iterator routing_table::find_bucket(node_id const& id)
if (num_buckets == 0)
{
m_buckets.push_back(routing_table_node());
m_buckets.back().last_active = min_time();
// add 160 seconds to prioritize higher buckets (i.e. buckets closer to us)
m_buckets.back().last_active = min_time() + seconds(160);
++num_buckets;
}
@ -394,7 +405,9 @@ bool routing_table::add_node(node_entry const& e)
// this is the last bucket, and it's full already. Split
// it by adding another bucket
m_buckets.push_back(routing_table_node());
m_buckets.back().last_active = min_time();
// the extra seconds added to the end is to prioritize
// buckets closer to us when refreshing
m_buckets.back().last_active = min_time() + seconds(160 - m_buckets.size());
bucket_t& new_bucket = m_buckets.back().live_nodes;
bucket_t& new_replacement_bucket = m_buckets.back().replacements;