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

Performance monitoring .............................................................. 488
Setting performance priorities ................................................ 488
Obtaining performance data ................................................... 489
Using performance data ........................................................ 490
Tuning VxVM ............................................................................ 494
General tuning guidelines ...................................................... 494
Tuning guidelines for large systems ......................................... 494
Changing the values of VxVM tunables ..................................... 495
Tunable parameters for VxVM ................................................ 496
DMP tunable parameters ....................................................... 504
Disabling I/O statistics collection ............................................ 511
Enabling I/O statistics collection ............................................. 511
Appendix A Using Veritas Volume Manager commands ................. 513
About Veritas Volume Manager commands ..................................... 513
CVM commands supported for executing on the slave node ................ 536
Online manual pages ................................................................... 543
Section 1M — administrative commands ................................... 544
Section 4 — file formats ......................................................... 548
Section 7 — device driver interfaces ......................................... 548
Appendix B Configuring Veritas Volume Manager ........................... 551
Setup tasks after installation ........................................................ 551
Unsupported disk arrays .............................................................. 552
Foreign devices .......................................................................... 552
Initialization of disks and creation of disk groups ............................. 552
Guidelines for configuring storage ................................................. 552
Mirroring guidelines ............................................................. 553
Dirty region logging guidelines ............................................... 554
Striping guidelines ............................................................... 554
RAID-5 guidelines ................................................................ 555
Hot-relocation guidelines ....................................................... 556
Accessing volume devices ...................................................... 557
VxVM’s view of multipathed devices .............................................. 558
Cluster support .......................................................................... 558
Configuring shared disk groups ............................................... 558
Converting existing VxVM disk groups to shared disk
groups .......................................................................... 559
Glossary ............................................................................................................. 561
Index ................................................................................................................... 569
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