fix hash key

cache/redis/redis.go

@@ -59,6 +59,6 @@ func New(dsn string, hashRadix string) *RedisClient {
 
 func Hash(s string) int {
 	h := fnv.New32a()
-	h.Write([]byte(s))
+	h.Write([]byte(strings.ToLower(s)))
 	return int(h.Sum32()) % vars.RedisShardings
 }