This section describes the basic terminology used throughout this book:
A file system whose initial contents are identical to the contents of a snapshot.
A generic name for the following ZFS entities: clones, file systems, snapshots, or volumes.
Each dataset is identified by a unique name in the ZFS namespace. Datasets are identified using the following format:
Identifies the name of the storage pool that contains the dataset
Is a slash-delimited path name for the dataset object
Is an optional component that identifies a snapshot of a dataset
A dataset that contains a standard POSIX file system.
A logical group of devices describing the layout and physical characteristics of the available storage. Space for datasets is allocated from a pool.
The process of transferring data from one device to another device is known as resilvering. For example, if a mirror component is replaced or taken offline, the data from the up-to-date mirror component is copied to the newly restored mirror component. This process is referred to as mirror resynchronization in traditional volume management products.
A read-only image of a file system or volume at a given point in time.
A logical device in a pool, which can be a physical device, a file, or a collection of devices.
A dataset used to emulate a physical device in order to support legacy file systems.