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Red Hat GNBD WITH GLOBAL FILE SYSTEM IN RHEL 4.5 Configuration And Administration Manual

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Using GNBD with Global File
System in RHEL 4.5
Configuration and Administration

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Summary of Contents for Red Hat GNBD WITH GLOBAL FILE SYSTEM IN RHEL 4.5

  • Page 1 Using GNBD with Global File System in RHEL 4.5 Configuration and Administration...
  • Page 2 All other trademarks referenced herein are the property of their respective owners. The GPG fingerprint of the security@redhat.com key is: CA 20 86 86 2B D6 9D FC 65 F6 EC C4 21 91 80 CD DB 42 A6 0E...

  • Page 4: Table Of Contents

    Table of Contents Introduction .......................v 1. About This Guide ...................v 2. Audience .......................v 3. Software Versions ..................v 4. Related Documentation ..................v 5. Document Conventions ................. 1. Using GNBD with Red Hat GFS ................1 2. Considerations for Using GNBD with Device-Mapper Multipath .........2 1.

  • Page 5: Introduction

    Introduction 1. About This Guide This book describes how to use Global Network Block Device (GNDB) with Global File System (GFS), including information about device-mapper multipath, GNDB driver and command us- age, and running GFS on a GNBD server node. 2.

  • Page 6: Document Conventions

    Red Hat Cluster Suite documentation and other Red Hat documents are available in HTML and PDF versions online at the following location: http://www.redhat.com/docs 5. Document Conventions Certain words in this manual are represented in different fonts, styles, and weights. This high- lighting indicates that the word is part of a specific category.
  • Page 7 5. Document Conventions Italic Courier font represents a variable, such as an installation directory: install_dir/bin/ bold font Bold font represents application programs and text found on a graphical interface. When shown like this: OK , it indicates a button on a graphical application interface. Additionally, the manual uses different strategies to draw your attention to pieces of information.

  • Page 8: Using Gnbd With Red Hat Gfs

    Chapter 1. Using GNBD with Red Hat GNBD (Global Network Block Device) provides block-level storage access over an Ethernet LAN. GNBD components run as a client in a GFS node and as a server in a GNBD server node. A GNBD server node exports block-level storage from its local storage (either directly attached storage or SAN storage) to a GFS node.

  • Page 9: Considerations For Using Gnbd With Device-Mapper Multipath

    Chapter 2. Considerations for Using GNBD with Device-Mapper Multipath GNBD with device-mapper multipath allows you to configure multiple GNBD server nodes (nodes that export GNBDs to GFS nodes) to provide redundant paths to the storage devices. The GNBD server nodes, in turn, present multiple storage paths to GFS nodes via redundant GNBDs.

  • Page 10: Gnbd Driver And Command Usage

    Chapter 3. GNBD Driver and Command Usage The Global Network Block Device (GNBD) driver allows a node to export its local storage as a GNBD over a network so that other nodes on the network can share the storage. Client nodes importing the GNBD use it like any other block device.
  • Page 11 Usage Note A server should not import the GNBDs to use them as a client would. If a server exports the devices uncached, the underlying devices may also be used by Usage gnbd_export -dpathname-egnbdname [-c][-u][-U pathname Specifies a storage device to export. gnbdname Specifies an arbitrary name selected for the GNBD.
  • Page 12 Examples its options, refer to the man page. gnbd_export -u uid Manually sets the Universal Identifier for an exported device. This option is used with The UID is used by device-mapper multipath to determine which devices belong in a mul- tipath map.

  • Page 13: Importing A Gnbd On A Client

    as GNBD with cache enabled. dev/sdb2 delta gnbd_export -d /dev/sdb1 -e delta -c This example exports device as GNBD with cache enabled. /dev/sdb2 delta gnbd_export -d /dev/sdb2 -e delta -c 2. Importing a GNBD on a Client kernel module must be loaded on a node before it can import GNBDs. When GN- gnbd.ko BDs are imported, device nodes are created for them in with the name assigned...

  • Page 14: Running Gfs On A Gnbd Server Node

    Chapter 4. Running GFS on a GNBD Server Node You can run GFS on a GNBD server node, with some restrictions. In addition, running GFS on a GNBD server node reduces performance. The following restrictions apply when running GFS on a GNBD server node.

  • Page 15: Index

    Index device-mapper multipath, 2 fencing GNBD server nodes, 2 Linux page caching, 2 driver and command usage, 3 exporting from a server, 3 importing on a client, 6 exporting from a server daemon, 3 fencing GNBD server nodes, 2 GFS, using on a GNBD server node, 7 GNBD, using with Red Hat GFS, 1 gnbd.ko module, 3, 6 gnbd_export command , 3, 4...

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