VERITAS Volume Manager 3.2 for HP-UX Release Notes

What’s in This Version

Chapter 110

What’s in This Version

Benefits

The VERITAS Volume Manager for HP-UX 3.2 (VxVM) includes many features that are not

available with LVM on HP-UX. Some of these features are:

• Java-based administrative GUI

• RAID-5

• dynamic multipathing for I/O load balancing

• support for up to 32 mirrors

• striped mirrors

• online relayout of volumes

• Device Discovery Layer (DDL)

• boot performance enhancements

• support of striped mirrors (layered volumes), online relayout, and Oracle resilvering with

CVM

• CVM infrastructure changes to support CFS

Performance Enhancements in VxVM 3.2

VxVM 3.2 offers significant enhancements which speed transactions, reduce processing time,

and improve bandwidth usage. These improvements do not require special tuning and are

particularly noticeable in large configurations.

• The maximum size of a private region has been doubled; this allows large sites to create

more volume manager objects in a disk group, and is particularly useful for users who use

layered volumes.

• Object creation time (especially with vxassist) has been reduced dramatically for

configurations over approximately 5,000 objects. Volume creation time remains nearly

constant up to and beyond 50,000 objects.

• Disk group import times are faster, due to improvements in object indexing and new code

which improves I/O bandwidth usage while validating the on-disk configuration copies. All

configurations notice faster import times, but large configurations experience the most

dramatic improvements. If existing large disk groups are combined, the results are even

more impressive.

• System management commands like vxprint and vxstat run in a fraction of the time,

and have less impact on other operations.