A company deployed multiple block service applications on the same Huawei distributed storage device, including daily backup, database sorting, and billing cycle settlement. The administrator found that these services would extremely consume system resources during a specific period of time. It happens during working hours that will affect other interactive businesses. Administrators use QoS features to limit the consumption of storage resources by these services according to their occurrence time period, and avoid affecting production services or interactive services. Which resources should administrators consider to restrict? (Multiple choice)