Veritas File System 5.1 SP1 Administrator"s Guide (5900-1499, April 2011)

Veritas File System features
VxFS includes the following features:
■ Extent-based allocation
Extents allow disk I/O to take place in units of multiple blocks if storage is
allocated in consecutive blocks.
■ Extent attributes
Extent attributes are the extent allocation policies associated with a file.
■ Fast file system recovery
VxFS provides fast recovery of a file system from system failure.
■ Extended mount options
The VxFS file system supports extended mount options to specify enhanced
data integrity modes, enhanced performance modes, temporary file system
modes, improved synchronous writes, and large file sizes.
■ Enhanced performance mode
VxFS provides mount options to improve performance.
■ Large files and file systems support
VxFS supports files larger than two gigabytes and large file systems up to 256
terabytes.
■ Extra Big File Systems
VxFS supports file systems greater than 32 terabytes. Extra Big File Systems
functionality is separately licensed.
See the HP OnLineJFS documentation.
■ Storage Checkpoints
Backup and restore applications can leverage Storage Checkpoints, adisk-and
I/O-efficient copying technology for creating periodic frozen images of a file
system.
See the Veritas Storage Foundation Advanced Features Administrator's Guide.
■ VxFS file snapshots
A VxFS file snapshot is a space-optimized copy of a file in the same name space,
stored in the same file system.
See the Veritas Storage Foundation Advanced Features Administrator's Guide.
■ Quotas
VxFS supports quotas, which allocate per-user quotas and limit the use of two
principal resources: files and data blocks.
■ Cluster File System
17Introducing Veritas File System
Veritas File System features