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Merge pull request #3184 from yichengq/fast-bootstrap

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etcdserver: tick ElectionTicks before starting when bootstrap new cluster
This commit is contained in:
Yicheng Qin 2015-08-06 15:54:40 -07:00
commit f03f048232
1 changed files with 12 additions and 0 deletions
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12
etcdserver/raft.go
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@ -210,6 +210,16 @@ func (r *raftNode) resumeSending() {
p.Resume()
}
// advanceTicksForElection advances ticks to the node for fast election.
// This reduces the time to wait for first leader election if bootstrapping the whole
// cluster, while leaving at least 1 heartbeat for possible existing leader
// to contact it.
func advanceTicksForElection(n raft.Node, electionTicks int) {
for i := 0; i < electionTicks-1; i++ {
n.Tick()
}
}
func startNode(cfg *ServerConfig, cl *cluster, ids []types.ID) (id types.ID, n raft.Node, s *raft.MemoryStorage, w *wal.WAL) {
var err error
member := cl.MemberByName(cfg.Name)
@ -246,6 +256,7 @@ func startNode(cfg *ServerConfig, cl *cluster, ids []types.ID) (id types.ID, n r
}
n = raft.StartNode(c, peers)
raftStatus = n.Status
advanceTicksForElection(n, c.ElectionTick)
return
}
@ -275,6 +286,7 @@ func restartNode(cfg *ServerConfig, snapshot *raftpb.Snapshot) (types.ID, *clust
}
n := raft.RestartNode(c)
raftStatus = n.Status
advanceTicksForElection(n, c.ElectionTick)
return id, cl, n, s, w
}