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Configuration and Tuning GPFS for Digital Media ... - IBM Redbooks

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Contents<br />

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii<br />

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii<br />

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix<br />

The team who wrote this book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix<br />

Become a published author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi<br />

Comments welcome. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii<br />

Summary of changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii<br />

April 2005, First Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii<br />

Chapter 1. Introduction to digital media . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1<br />

1.1 What is digital media? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2<br />

1.2 <strong>IBM</strong> <strong>Digital</strong> <strong>Media</strong> Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4<br />

1.3 <strong>Digital</strong> media environment examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6<br />

1.3.1 Closed-circuit television (CCTV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6<br />

1.3.2 Video on dem<strong>and</strong> (VoD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />

1.3.3 Broadcasting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8<br />

1.3.4 Post-production environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9<br />

1.4 Broadcasting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

1.4.1 <strong>IBM</strong> <strong>Digital</strong> <strong>Media</strong> Center (DMC) offering . . . . . . . . . . . . . . . . . . . . . 13<br />

1.5 Streaming data versus normal IT traffic . . . . . . . . . . . . . . . . . . . . . . . . . . 15<br />

1.6 Complementary offerings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16<br />

1.6.1 Advanced tape management with Enterprise Removable <strong>Media</strong><br />

Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17<br />

1.7 ADMIRA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21<br />

1.7.1 Open Enterprise System Virtualization (OESV) . . . . . . . . . . . . . . . . 25<br />

Chapter 2. Introduction to <strong>GPFS</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31<br />

2.1 <strong>GPFS</strong> history <strong>and</strong> evolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32<br />

2.1.1 Why choose <strong>GPFS</strong>? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34<br />

2.2 <strong>GPFS</strong> architecture overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />

2.2.1 <strong>GPFS</strong> components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />

2.2.2 <strong>GPFS</strong> file system management functions . . . . . . . . . . . . . . . . . . . . . 36<br />

2.2.3 <strong>GPFS</strong> block allocation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38<br />

2.2.4 Token management <strong>and</strong> byte range locking . . . . . . . . . . . . . . . . . . . 39<br />

2.2.5 <strong>GPFS</strong> management functions availability . . . . . . . . . . . . . . . . . . . . . 43<br />

2.2.6 <strong>GPFS</strong> internal recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . 47<br />

2.2.7 Replication (disk failure groups) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50<br />

© Copyright <strong>IBM</strong> Corp. 2005. All rights reserved. iii

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