# FAQ

> This topic lists the frequently asked questions about the SDK.

This topic lists the frequently asked questions about the SDK.

**Where does the** Alipay+ **server SDK save the route configurations locally?**

The route configurations are saved in the local file system. The path for saving configurations is configured through the _ac.route.save-route-config-path_ property.

**What is the size of the route configuration data to be stored?**

The configuration data size changes. The configuration data contain all matching rules and the size can be as large as dozens of KBs.

**How often are** **the route configurations** **updated?**

The route configurations are updated for one time when initializing the Alipay+ server SDK and are scheduled to be updated periodically. To set the interval of the route configurations update, configure the _ac.route.pull-route-config-fixed-delay_ and _ac.route.pull-route-config-exception-retry-delay_ properties.

**How often are route configurations in storage read?**

The route configurations in storage might be read when initializing the Alipay+ server SDK conditionally. When identifying the code, the route configurations are not read.

**How does the** MPP **process the code if the code is not an** Alipay+ **code?**

It's recommended to open the code by appending _AlipayConnect_ in the _User-Agent_ header.