Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

Performance monitoring

and tuning

This chapter includes the following topics:

■ Performance guidelines

■ RAID-5

■ Performance monitoring

■ Tuning VxVM

Performance guidelines

Veritas Volume Manager (VxVM) can improve system performance by optimizing

the layout of data storage on the available hardware. VxVM lets you optimize data

storage performance using the following strategies:

■ Balance the I/O load among the available disk drives.

■ Use striping and mirroring to increase I/O bandwidth to the most frequently

accessed data.

VxVM also provides data redundancy through mirroring and RAID-5, which allows

continuous access to data in the event of disk failure.

Data assignment

When you decide where to locate file systems, you typically try to balance I/O

load among the available disk drives. The effectiveness of this approach is limited.

It is difficult to predict future usage patterns, and you cannot split file systems

across the drives. For example, if a single file system receives the most disk

accesses, moving the file system to another drive also moves the bottleneck.

Chapter