Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

15Contents
Disk striping ....................................................................................................444
Disk sparing and relocation management .......................................................445
Hardware failures ............................................................................................445
Rootability ......................................................................................................445
System name ...................................................................................................445
Rule definitions and attributes ................................................................................446
Chapter 16 Performance monitoring and tuning
Performance guidelines ...........................................................................................451
Data assignment ..............................................................................................451
Striping ...........................................................................................................452
Mirroring .........................................................................................................452
Combining mirroring and striping ..................................................................453
RAID-5 ...........................................................................................................453
Volume read policies ......................................................................................454
Performance monitoring .........................................................................................455
Setting performance priorities ........................................................................455
Obtaining performance data ............................................................................455
Using performance data ..................................................................................457
Tuning VxVM .........................................................................................................460
General tuning guidelines ...............................................................................460
Tuning guidelines for large systems ...............................................................461
Changing the values of tunables .....................................................................462
Tunable parameters .........................................................................................463
Appendix A Commands summary
Online manual pages ...............................................................................................493
Section 1M — administrative commands .......................................................493
Section 4 — file formats .................................................................................496
Section 7 — device driver interfaces ..............................................................496
Appendix B Configuring Veritas Volume Manager
Setup tasks after installation ...................................................................................497
Adding unsupported disk arrays as JBODs ............................................................498
Adding foreign devices ...........................................................................................498
Adding disks to disk groups ...................................................................................498
Guidelines for configuring storage .........................................................................499
Mirroring guidelines .......................................................................................500
Dirty region logging guidelines ......................................................................501
Striping guidelines ..........................................................................................501
RAID-5 guidelines ..........................................................................................502
Hot-relocation guidelines ................................................................................502