Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Running a rule ..................................................................... 508
Identifying configuration problems using Storage Expert .................. 509
Recovery time ...................................................................... 510
Disk groups ......................................................................... 511
Disk striping ........................................................................ 513
Disk sparing and relocation management ................................. 514
Hardware failures ................................................................. 515
Rootability .......................................................................... 515
System name ....................................................................... 515
Rule definitions and attributes ................................................ 515
Chapter 16 Performance monitoring and tuning ............................. 521
Performance guidelines ............................................................... 521
Data assignment .................................................................. 521
Striping .............................................................................. 522
Mirroring ............................................................................ 522
Combining mirroring and striping ........................................... 523
RAID-5 ..................................................................................... 523
Volume read policies ............................................................. 523
Performance monitoring .............................................................. 524
Setting performance priorities ................................................ 524
Obtaining performance data ................................................... 525
Using performance data ........................................................ 526
Tuning VxVM ............................................................................ 530
General tuning guidelines ...................................................... 530
Tuning guidelines for large systems ......................................... 530
Changing the values of tunables .............................................. 531
Tunable parameters for VxVM ................................................ 532
DMP tunable parameters ....................................................... 540
Appendix A Using Veritas Volume Manager commands ................. 547
About Veritas Volume Manager commands ..................................... 547
Online manual pages ................................................................... 569
Section 1M — administrative commands ................................... 570
Section 4 — file formats ......................................................... 574
Section 7 — device driver interfaces ......................................... 574
Appendix B Migrating arrays ................................................................ 577
Migrating to thin provisioning ...................................................... 577
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