VERITAS File System 4.1 (HP OnlineJFS/JFS) Release Notes (September 2005)

VERITAS File System 4.1 Release Notes
New Features
Chapter 1 11
An online conversion utility vxupgrade is provided to upgrade existing disk layouts to
Disk Layout Version 6 on mounted file systems.
NOTE In this release of VxFS, file sizes can grow only up to 2 TB.
• Quality of Storage Service (QoSS)
The Quality of Storage Service (QoSS) feature allows mapping of more than one device to
a single file system.The QoSS feature is built on the multi-volume support technology
introduced in this release.Using QoSS, policies can be configured, that automatically
relocate files from one device to another,or files can be relocated using relocation
commands. Having multiple devices improves performance for applications that access
specific types of files. QoSS is managed using the VERITAS Enterprise Administrator
(VEA) GUI, or the fssweep, fsmove and fsrpadm commands. QoSS functionality is a
separately licensable feature that is available with the VRTSfspro package.
The following commands are associated with QoSS:
fsmove Relocates files to a destination component volume.
fssweep Traverses the directory structure of one or more file systems.
fsrpadm Administer relocation policies.
NOTE To use the QoSS feature, a separate license key is required.
• Storage Checkpoint Quotas
Usage limits can be set on Storage Checkpoints. The following keywords were added to
the fsckptadm command to administer Storage Checkpoints quota functionality:
getquotalimit Displays current quota limits, current usage, and flags set.
setquotalimit Sets the hard limit and soft limits for Storage Checkpoint quotas.
quotaon and
quotaoff Turns Storage Checkpoint quotas on and off.
• Storage Checkpoint File System Restore
Storage Checkpoints can be used by backup and restore applications to restore either
individual files or an entire file system. Restoring from Storage Checkpoints can recover
data from incorrectly modified files, but typically cannot be used to recover from hardware
damage or other file system integrity problems. File system restoration can be done using
the fsckpt_restore(1M) administrative command.