Front cover A Guide to the IBM Clustered Network File System Discusses the technical architecture Explains installation and configuration Includes administration and operation information Ira Chavis Dave Coutts Bob Demkowicz Jay Huie Shuzheng Liu Sheryl Qualters Daniel Turkenkopf ibm.com/redbooks Redpaper International Technical Support Organization A Guide to the IBM Clustered Network File System November 2010 REDP-4400-01 Note: Before using this information and the product it supports, read the information in “Notices” on page v. Second Edition (November 2010) This edition applies to the IBM Clustered Network File System package. © Copyright International Business Machines Corporation 2010. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . .v Trademarks . vi Preface . vii The team that wrote this paper . vii Now you can become a published author, too! . viii Comments welcome. ix Stay connected to IBM Redbooks . ix Chapter 1. Introduction to the IBM Clustered Network File System. 1 1.1 Overview . 2 1.2 IBM Clustered Network File System . 3 1.3 Business trends and line of business requirements . 4 1.3.1 Product life cycle management for the automotive industry . 4 1.3.2 Financial services . 5 1.3.3 Electronic design automation . 6 1.3.4 Communications and digital media . 6 1.3.5 Pharmaceuticals . 7 1.3.6 Other industries. 7 1.4 Challenges and customer requirements . 7 1.5 Solution elements and key features . 8 1.6 Targeted users . 9 1.7 Required skills for the reader of this paper . 10 Chapter 2. Clustered NFS technical architecture. 11 2.1 Architecture . 12 2.2 Availability features . 15 2.2.1 Load balancing . 15 2.2.2 Monitoring and failover . 15 Chapter 3. Clustered NFS and the IBM Intelligent Cluster . 17 3.1 IBM Intelligent Cluster . 18 3.2 Recommended CNFS initial base configuration . 20 3.2.1 Key features of the configuration . 20 3.2.2 CNFS: IBM Intelligent Cluster rack configuration . 22 3.2.3 Configuration considerations . 22 3.3 Ordering an IBM Intelligent Cluster and CNFS . 23 3.4 Installation service and support. 23 Chapter 4. Clustered NFS installation and configuration . 25 4.1 Prerequisites . 26 4.1.1 System prerequisites . 26 4.1.2 Network prerequisites . 27 4.2 GPFS configuration. 27 4.3 CNFS configuration. 27 4.3.1 Load balancing . 29 4.3.2 NFS exports file . 29 4.4 NFS verification. 29 4.4.1 Viewing the CNFS configuration options. 29 © Copyright IBM Corp. 2010. All rights reserved. iii 4.4.2 Querying the CNFS cluster status. 30 4.4.3 Querying the CNFS node status . 30 Chapter 5. Clustered NFS administration and operation . 33 5.1 Exporting share . 34 5.2 Mounting NFS share . 34 5.3 Starting CNFS . 35 5.4 Adding a node . 36 5.5 Removing a CNFS node from a cluster . 36 5.6 Disabling a CNFS node. 37 5.7 Failing over a node . 38 5.8 Failing back a node . 38 5.9 Adding storage . 38 5.10 Removing storage . 38 5.11 Monitoring the cluster . 38 5.11.1 GPFS log file. 39 5.11.2 The var/log/messages/ or dmsg . 39 Chapter 6. Best practices . 41 6.1 NFS security considerations . 42 6.1.1 Securing an NFS server from a trusted client . 42 6.1.2 Protecting an NFS server from untrusted clients . 43 6.1.3 Protecting a client from an NFS server . 43 6.2 Expanding the solution . 44 6.2.1 IBM Intelligent Cluster CNFS advanced configurations . 44 6.2.2 IBM Intelligent Cluster networking requirements. 48 6.2.3 Storage expansion . 50 6.3 Integration into other environments. 51 6.3.1 Backup . ..