By spreading the disks between the HBAs, and hence the controllers on the DS4500s, you balance the load and enhance the performance of the back end.
通过将磁盘分布在hba之间，以及DS4500s的控制器之间，就可以实现负载均衡，并提高后端的性能。
Next, you need to load and parse the car sales data from the back-end service.
接着，您需要加载并解析来自后端服务的汽车销售数据。
In the case where this does not exist, then the result might be a loader being invoked, which will load the value from a back-end datastore (4).
如果它不存在，那么结果可能会是一个正被调用的加载程序，它会从一个后端数据存储(4)加载值。
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