Veritas File System v5.0.1 Administrator's Guide for HP-UX 11i v3 (5900-0082, June 2010)

■ Use multi-volume file systems
■ Set intent log options
■ Unmount a file system from a cluster node
■ Remove resource information for a cluster file system
See the VEA online help.
Online system administration
VxFS provides command line interface (CLI) operations that are described
throughout this guide and in manual pages.
VxFS allows you to run a number of administration tasks while the file system is
online. Two of the more important tasks include:
■ Defragmentation
■ File system resizing
About defragmentation
Free resources are initially aligned and allocated to files in an order that provides
optimal performance. On an active file system, the original order of free resources
is lost over time as files are created, removed, and resized. The file system is
spread farther along the disk, leaving unused gaps or fragments between areas
that are in use. This process is known as fragmentation and leads to degraded
performance because the file system has fewer options when assigning a free
extent to a file (a group of contiguous data blocks).
VxFS provides the online administration utility fsadm to resolve the problem of
fragmentation.
The fsadm utility defragments a mounted file system by performing the following
actions:
■ Removing unused space from directories
■ Making all small files contiguous
■ Consolidating free blocks for file system use
This utility can run on demand and should be scheduled regularly as a cron job.
About file system resizing
A file system is assigned a specific size as soon as it is created; the file system may
become too small or too large as changes in file system usage take place over time.
Introducing Veritas File System
Using Veritas File System
30