Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An AG or allocation group is a subvolume in a file system which maintains its own track of free blocks and file data (and its own journal, in the case of XFS). This makes simultaneous file operations possible; only one write can happen to an AG at any time, but multiple operations ...Täielik kirjeldus
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An AG or allocation group is a subvolume in a file system which maintains its own track of free blocks and file data (and its own journal, in the case of XFS). This makes simultaneous file operations possible; only one write can happen to an AG at any time, but multiple operations can be performed on the file system, each happening in a different AG. In SMP systems multiple CPUs can write to different AGs, enabling physically concurrent disk operations on a single file system. (Hard disks can only do one thing at a time. However, file systems can span hard disks in various ways (RAID stripe, volume management, etc)).