Veritas™ File System 5.0.1 Administrator's Guide

■ 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.
■ Online backup
VxFS provides online data backup using the snapshot feature.
■ Quotas
VxFS supports quotas, which allocate per-user and per-group quotas and limit
the use of two principal resources: files and data blocks.
■ Cluster File System
Clustered file systems are an extension of VxFS that support concurrent direct
media access from multiple systems.
■ Improved database performance
■ Storage Checkpoints
Backup and restore applications can leverage Storage Checkpoint, a disk- and
I/O-efficient copying technology for creating periodic frozen images of a file
system.
■ Cross-platform data sharing
Cross-platform data sharing allows data to be serially shared among
heterogeneous systems where each system has direct access to the physical
devices that hold the data.
■ File Change Log
The VxFS File Change Log tracks changes to files and directories in a file
system.
17Introducing Veritas File System
Veritas File System features