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# CKOperation.Configuration

An object that describes how a CloudKit operation behaves.

```
class Configuration
```

## Overview

All of the properties in `CKOperationConfiguration` have a default value. When determining which properties to apply to a CloudKit operation, consult the operation’s configuration property, as well as the [`defaultConfiguration`](/documentation/CloudKit/CKOperationGroup/defaultConfiguration) property of the group that the operation belongs to. These properties combine through the following rules:

|Group default configuration value|Operation configuration value|Value applied to operation               |
|---------------------------------|-----------------------------|-----------------------------------------|
|default value                    |default value                |default value                            |
|default value                    |explicit value               |operation.configuration explicit value   |
|explicit value                   |default value                |group.defaultConfiguration explicit value|
|explicit value                   |explicit value               |operation.configuration explicit value   |

## Topics

### Preparing a Configuration

[`allowsCellularAccess`](/documentation/CloudKit/CKOperation/Configuration-swift.class/allowsCellularAccess)

A Boolean value that indicates whether operations that use this configuration can send data over the cellular network.

[`container`](/documentation/CloudKit/CKOperation/Configuration-swift.class/container)

The configuration’s container.

[`isLongLived`](/documentation/CloudKit/CKOperation/Configuration-swift.class/isLongLived)

A Boolean value that indicates whether the operations that use this configuration are long-lived.

[`qualityOfService`](/documentation/CloudKit/CKOperation/Configuration-swift.class/qualityOfService)

The priority that the system uses when it allocates resources to the operations that use this configuration.

[`timeoutIntervalForRequest`](/documentation/CloudKit/CKOperation/Configuration-swift.class/timeoutIntervalForRequest)

The maximum amount of time that a request can take.

[`timeoutIntervalForResource`](/documentation/CloudKit/CKOperation/Configuration-swift.class/timeoutIntervalForResource)

The maximum amount of time that a resource request can take.


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