Dell™ PowerVault MD3000 and MD3000i Array Tuning Best Practices
Table of Contents
1
AUDIENCE AND SCOPE .............................................................................................................................. 4
2
PERFORMANCE TUNING OVERVIEW .......................................................................................................... 4
2.1
2.2
3
4
4.1
4.1.1
4.1.2
4.2
4.3
V
4.4
V
4.5
4.6
................................................................................................................................................12
4.6.1
4.6.2
4.6.3
4.7
4.7.1
4.7.2
RAID Level ............................................................................................................................................14
4.7.3
I/O Distribution ....................................................................................................................................15
4.7.4
Stripe Size.............................................................................................................................................16
4.7.5
Write Algorithm Data ..........................................................................................................................19
4.8
4.9
4.9.1
Global Media Scan Rate.......................................................................................................................22
4.9.2
4.10
4.10.1
4.10.2
5
5.1
5.1.1
5.1.2
5.1.3
5.2
5.2.1
Buffering the I/O ..................................................................................................................................25
5.2.2
APPENDIX C: REFERENCES ................................................................................................................................29
APPENDIX D: GLOSSARY OF TERMS ...................................................................................................................30
December 2008 - Revision A01
............................................................................................................4
........................................................................................................................6
...................................................................................................................9
...................................................................................................................................10
...........................................................................................................14
...............................................................................................................21
...........................................................................................................................22
..................................................................................................................22
...............................................................................................................................23
...................................................................................................................25
...........................................................................................4
.................................................................................................8
..................................................................................................10
Page 3