◦Bypasses the system buffer cache for file I/O
◦Specifies the expected access pattern for a file
•Extended Mount Options
The extended mount options supported by VxFS include the following:
◦Enhanced data integrity modes
◦Enhanced performance modes
◦Temporary file system modes
◦Improved synchronous writes
◦Large file sizes
•Large File and File System Sizes
File systems up to 40 TB and files up to 16 TB in size are supported on HP-UX 11i v3. For more information on files and file system sizes supported by VxFS, see the Supported File and File System Sizes white paper on HP Business Support Center.
•Enhanced I/O Performance
VxFS provides enhanced I/O performance by applying an aggressive I/O clustering policy, integrating with VxVM, and allowing application specific parameters to be set on a per-file system basis. However, clustering support is not available with the current release.
•Storage Checkpoints
To increase availability, recoverability, and performance, VxFS offers on-disk and online backup and restore utilities that facilitate frequent and efficient backup of the file system. Backup and restore applications can leverage the Storage Checkpoint, a disk and I/O-efficient copying technology for creating periodic frozen images of a file system. Storage Checkpoints present a view of a file system at a point in time, and subsequently identifies and maintains copies of the original file system blocks. Instead of using a disk-based mirroring method, Storage Checkpoints save disk space and significantly reduce I/O overhead by using the free space pool available to a file system.
•Quotas
VxFS supports quotas, which allocate per-user quotas and limit the use of two principal resources files and data blocks.
•Multi-Volume Support
The Multi-Volume support enables several volumes to be encapsulated into a single virtual object called volume set. This volume set can then be used to create a file system, thereby enabling advanced features such as Dynamic Storage Tiering.
•SmartMove™ Feature
SmartMove reduces the time and I/O required to attach or reattach a plex to an existing VxVM volume, in the specific case where a VxVM volume has a VxFS file system mounted on