Table Of Contents; System Requirements - Red Hat ENTERPRISE LINUX 4 - GLOBAL FILE SYTEM Manual

Introduction
1. Audience ........................................................................................................................ v
2. Related Documentation ................................................................................................... v
3. Document Conventions ................................................................................................... vi
3.1. Typographic Conventions ..................................................................................... vi
3.2. Pull-quote Conventions ........................................................................................ vii
3.3. Notes and Warnings ........................................................................................... viii
4. Feedback ..................................................................................................................... viii
5. Recommended References ............................................................................................. ix
1. GFS Overview
1.1. Performance, Scalability, and Economy ......................................................................... 1
1.1.1. Superior Performance and Scalability ................................................................. 1
1.1.2. Performance, Scalability, Moderate Price ............................................................ 2
1.1.3. Economy and Performance ................................................................................ 3
1.2. GFS Functions ............................................................................................................. 4
1.3. GFS Software Subsystems ........................................................................................... 4
1.4. Before Setting Up GFS ................................................................................................ 5

2. System Requirements

2.1. Platform Requirements ................................................................................................. 7
2.2. Red Hat Cluster Suite .................................................................................................. 7
2.3. Fencing ....................................................................................................................... 7
2.4. Fibre Channel Storage Network .................................................................................... 7
2.5. Fibre Channel Storage Devices ..................................................................................... 8
2.6. Network Power Switches .............................................................................................. 8
2.7. Console Access ........................................................................................................... 8
2.8. Installing GFS .............................................................................................................. 9
3. Getting Started
3.1. Prerequisite Tasks ...................................................................................................... 11
3.2. Initial Setup Tasks ...................................................................................................... 11
4. Managing GFS
4.1. Making a File System ................................................................................................. 13
4.2. Mounting a File System .............................................................................................. 15
4.3. Unmounting a File System .......................................................................................... 17
4.4. GFS Quota Management ............................................................................................ 18
4.4.1. Setting Quotas ................................................................................................ 18
4.4.2. Displaying Quota Limits and Usage .................................................................. 19
4.4.3. Synchronizing Quotas ...................................................................................... 21
4.4.4. Disabling/Enabling Quota Enforcement ............................................................. 22
4.4.5. Disabling/Enabling Quota Accounting ................................................................ 22
4.5. Growing a File System ............................................................................................... 23
4.6. Adding Journals to a File System ................................................................................ 25
4.7. Direct I/O ................................................................................................................... 27
4.7.1. O_DIRECT ....................................................................................................... 27
4.7.2. GFS File Attribute ............................................................................................ 27
4.7.3. GFS Directory Attribute .................................................................................... 28
4.8. Data Journaling .......................................................................................................... 28
4.9. Configuring atime Updates ........................................................................................ 29
4.9.1. Mount with noatime ....................................................................................... 30
4.9.2. Tune GFS atime Quantum ............................................................................. 30
v
1
7
11
13
iii