diff --git a/alert/naming/hashring.go b/alert/naming/hashring.go
index 23a1e08d40e3cb40e86f42667c31af4f24b5ab35..aeb5b5688c6c905e83a741364e10942556b3779c 100644
--- a/alert/naming/hashring.go
+++ b/alert/naming/hashring.go
@@ -16,7 +16,7 @@ type DatasourceHashRingType struct {
 }
 
 // for alert_rule sharding
-var HostDatasource int64 = -999
+var HostDatasource int64 = 99999999
 var DatasourceHashRing = DatasourceHashRingType{Rings: make(map[int64]*consistent.Consistent)}
 
 func NewConsistentHashRing(replicas int32, nodes []string) *consistent.Consistent {