func proxy(method string, args interface{}, reply interface{}) error {
// 随机遍历hbs列表，直到数据发送成功 或者 遍历完
err := fmt.Errorf("proxy connections not available")
sendOk := false
rint := rand.Int()
for i := 0; i < HbsNum && !sendOk; i++ {
idx := (i + rint) % HbsNum
host := HbsHostnames[idx]
addr := HbsMap[host]
// 过滤掉建连缓慢的host, 否则会严重影响发送速率
key := addr + "." + method
cc := pfc.GetCounterCount(key)
if cc >= HbsMaxConns {
continue
}
pfc.Counter(key, 1)
err = ConnPools.Call(addr, method, args, reply)
pfc.Counter(key, -1)
if err == nil {
pfc.Meter(key+".ok", 1)
sendOk = true
} else {
pfc.Meter(key+".error", 1)
}
}
return err
}
func forward2TransferTask(Q *nlist.SafeListLimited, concurrent int32) {
cfg := g.Config()
batch := int(cfg.Transfer.Batch)
maxConns := int64(cfg.Transfer.MaxConns)
retry := int(cfg.Transfer.Retry)
if retry < 1 {
retry = 1
}
sema := nsema.NewSemaphore(int(concurrent))
transNum := len(TransferHostnames)
for {
items := Q.PopBackBy(batch)
count := len(items)
if count == 0 {
time.Sleep(time.Millisecond * 50)
continue
}
transItems := make([]*cmodel.MetricValue, count)
for i := 0; i < count; i++ {
transItems[i] = convert(items[i].(*cmodel.MetaData))
}
sema.Acquire()
go func(transItems []*cmodel.MetricValue, count int) {
defer sema.Release()
var err error
// 随机遍历transfer列表，直到数据发送成功 或者 遍历完;随机遍历，可以缓解慢transfer
resp := &g.TransferResp{}
sendOk := false
for j := 0; j < retry && !sendOk; j++ {
rint := rand.Int()
for i := 0; i < transNum && !sendOk; i++ {
idx := (i + rint) % transNum
host := TransferHostnames[idx]
addr := TransferMap[host]
// 过滤掉建连缓慢的host, 否则会严重影响发送速率
cc := pfc.GetCounterCount(host)
if cc >= maxConns {
continue
}
pfc.Counter(host, 1)
err = SenderConnPools.Call(addr, "Transfer.Update", transItems, resp)
pfc.Counter(host, -1)
if err == nil {
sendOk = true
// statistics
TransferSendCnt[host].IncrBy(int64(count))
} else {
// statistics
TransferSendFailCnt[host].IncrBy(int64(count))
}
}
}
// statistics
if !sendOk {
if cfg.Debug {
log.Printf("send to transfer fail, connpool:%v", SenderConnPools.Proc())
}
pfc.Meter("SendFail", int64(count))
} else {
pfc.Meter("Send", int64(count))
}
}(transItems, count)
}
}
