Installation guide

Table of Contents
Introduction ...............................................................................................................vi
1. Audience .......................................................................................................vi
2. Related Documentation ..................................................................................vi
3. Document Conventions ................................................................................. vii
4. Send in Your Feedback ................................................................................ viii
5. Recommended References .......................................................................... viii
1. GFS Overview ....................................................................................................... 1
1. New and Changed Features ........................................................................... 1
2. Performance, Scalability, and Economy ........................................................... 2
2.1. Superior Performance and Scalability ................................................... 2
2.2. Performance, Scalability, Moderate Price .............................................. 3
2.3. Economy and Performance .................................................................. 3
3. GFS Functions ............................................................................................... 4
4. GFS Software Subsystems ............................................................................. 5
5. Before Setting Up GFS ................................................................................... 6
2. System Requirements ............................................................................................ 8
1. Platform Requirements ................................................................................... 8
2. Red Hat Cluster Suite ..................................................................................... 8
3. Fencing ......................................................................................................... 8
4. Fibre Channel Storage Network ...................................................................... 9
5. Fibre Channel Storage Devices ....................................................................... 9
6. Network Power Switches ................................................................................ 9
7. Console Access ............................................................................................10
8. Installing GFS ...............................................................................................10
3. Getting Started .....................................................................................................11
1. Prerequisite Tasks ........................................................................................11
2. Initial Setup Tasks .........................................................................................11
4. Managing GFS .....................................................................................................13
1. Making a File System ....................................................................................13
2. Mounting a File System .................................................................................16
3. Unmounting a File System .............................................................................18
4. GFS Quota Management ...............................................................................18
4.1. Setting Quotas ...................................................................................19
4.2. Displaying Quota Limits and Usage .....................................................20
4.3. Synchronizing Quotas ........................................................................21
4.4. Disabling/Enabling Quota Enforcement ................................................22
4.5. Disabling/Enabling Quota Accounting ..................................................23
5. Growing a File System ..................................................................................24
6. Adding Journals to a File System ...................................................................26
7. Direct I/O ......................................................................................................28
7.1. O_DIRECT ........................................................................................28
7.2. GFS File Attribute ...............................................................................28
7.3. GFS Directory Attribute .......................................................................29
8. Data Journaling .............................................................................................29
9. Configuring atime Updates ............................................................................30
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