redis hset hmset过期时间

127.0.0.1:6379> hset m k v (integer) 1 127.0.0.1:6379> hget m k "v" 127.0.0.1:6379> expire m 30 (integer) 1 127.0.0.1:6379> ttl m (integer) 24 127.0.0.1:6379> ttl m (integer) 22 127.0.0.1:6379> ttl m (integer) 21 127.0.0.1:6379> ttl m (integer) 20 127.0.0.1:6379> ttl m (integer) 19 127.0.0.1:6379> ttl m (integer) 18 127.0.0.1:6379> ttl m (integer) 17 127.0.0.1:6379> ttl m (integer) -2