Veritas 5.0.1 Installation Guide HP-UX 11i v3 (5992-0031, September 2011)

• 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 white paper
Supported File and File System Sizes at http://www.docs.hp.com.
• 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
it. The SmartMove feature uses VxFS information to detect free extents and avoids copying
them.
• Dynamic Storage Tiering Enhancements
The Dynamic Storage Tiering (DST) feature provides the following enhancements:
◦ Enhanced DST APIs to provide a new interface for managing allocation policies of storage
checkpoints during creation and later, and for managing named data stream allocation
policies
◦ fsppadm support for user ID (UID), group ID (GID), and tagging (TAG) elements in the
placement policy XML file
◦ Improved scan performance in the fsppadm command
◦ Suppressed processing of the chosen RULE
◦ Parser support for UID, GID, and TAG elements in a DST policy
◦ What-if support for analyzing and enforcing without requiring the policy to be assigned
◦ Storage Checkpoint data placement support in a DST policy
◦ Shared DB thread handle support
◦ CPU and I/O throttling support for DST scans
18 Introduction