Using Gnbd With Red Hat Gfs - Red Hat ENTERPRISE LINUX 5 - GLOBAL NETWORK BLOCK DEVICE Use Manual

Chapter 1.

Using GNBD with Red Hat GFS

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.
Table 1.1, "GNBD Software Subsystem Components"
components.
Software Subsystem
GNBD
Table 1.1. GNBD Software Subsystem Components
You can configure GNBD servers to work with device-mapper multipath. GNBD with device-mapper
multipath allows you to configure multiple GNBD server nodes to provide redundant paths to the
storage devices. The GNBD servers, in turn, present multiple storage paths to GFS nodes via
redundant GNBDs. When using GNBD with device-mapper multipath, if a GNBD server node
becomes unavailable, another GNBD server node can provide GFS nodes with access to storage
devices.
This document how to use GNBD with Red Hat GFS and consists of the following chapters:
Chapter 2, Considerations for Using GNBD with Device-Mapper
•
the issues you should take into account when configuring multipathed GNBD server nodes
Chapter 3, GNBD Driver and Command
•
you are running GFS on a GNBD server node
Chapter 4, Running GFS on a GNBD Server
•
configure GNBD
Components
gnbd.ko
gnbd_export
gnbd_import
gnbd_serv
Usage, which describes the restrictions that apply when
Node, which describes the user commands that
summarizes the GNBD software subsystems
Description
Kernel module that implements the GNBD
device driver on clients.
Command to create, export and manage
GNBDs on a GNBD server.
Command to import and manage GNBDs on
a GNBD client.
A server daemon that allows a node to
export local storage over the network.
Multipath, which describes some of
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