HP Serviceguard Storage Management Suite Version A.02.01 for HP-UX 11i v2 Release Notes, Edition 2 (May 2010)

What’s New with Veritas File System (VxFS)
The following VxFS features and enhancements, which became available in April 2008, are
supported in the SG SMS version A.02.01 for HP-UX 11i v2 bundles:
• Support for Large Directories — VxFS 5.0 introduces an alternate indexing mechanism to
improve the performance of file system operations on directories with a large number of
entries.
• File Change Log — The VxFS File Change Log (FCL) tracks changes to files and directories
in a file system. The FCL can be used by applications, such as backup products, web crawlers,
search engines, indexing engines and replication software that typically scan an entire file
system searching for modification since a previous scan. This feature was introduced with
the VxFS 4.1 release on HP-UX 11i v2. FCL is supported only on file systems with Disk
Layout Version 6 or above.
• File-to-Volume and Volume-to-File Mapping in Multi-volume File Systems — supported
with two new commands:
— fsmap (reports the volume location of all data, or indirect extents associated with a file
in a multi-volume file system, and verifies that DST policies are working as requested)
— fsvmap (determines which data file is resident on a given volume for a multi-volume
file system and recovers only the affected files when an unprotected volume is
permanently lost)
• Large File Systems and Large File Support — with the HP OnlineJFS license you can create
file systems over 2 TB, up to a maximum of 32 TB. The EBFS license is required to create file
systems larger than 32 TB. The EBFS license is bundled with the HP Serviceguard Storage
Management suite. Contact your HP sales representative for information on obtaining this
license. For information on supported file systems and large file support, see the Supported
File and File System Sizes for HFS and JFS white paper available at: http://docs.hp.com/en/
oshpux11iv2.html#VxFS
• Cross Platform Data Sharing (CDS) — allows data to be serially shared among heterogeneous
systems, where each system has direct access to the physical devices that hold the data. This
feature can be used only in conjunction with VxVM
• Concurrent I/O — allows multiple processes to read or write to the same file without blocking
other read(2) or write(2) calls
• Nested Mounts — allows mounting a VxFS file system on any VxFS mount point. A directory
on a shared VxFS file system can be used as a mount point for a VxFS file system, enabling
nested mounts of shared file systems.
• Multi-volume File System Availability — allows you to mount a multi-volume file system
even if a component “data-only” volume is missing, or becomes unavailable
• Dynamic Storage Tiering (DST) — allows administrators of multi-volume VxFS or CFS file
systems to manage the placement of files on individual volumes in a volume set by defining
placement policies that control both initial file location and the circumstances under which
existing files are relocated
• 2K Volumes in a Volume Set — the number of volumes allowed in a volume set is now 2048,
increased from 256
• File Placement Policy Administration Improved — the fsppadm command administers the
file placement policies of the DST feature and replaces the functionality of the fsrpadm,
fsmove, and fssweep commands (see the fsppadm(1M)manual page)
• Pattern-Based Allocation Policies — pattern tables can be assigned to directories or file
systems
• Load Balancing — allocation policy where the distribution of extents between volumes is
mostly equal, if none of the volumes are full or disabled
• File System Reorganization Prevention — applications that require prevention of extent and
log reorganization can disable file system reorganization using the fsadm command by
14 HP Serviceguard Storage Management Suite Version A.02.01 for HP-UX 11i v2 Release Notes