Using Gnbd With Red Hat Gfs - Red Hat GNBD WITH GLOBAL FILE SYSTEM IN RHEL 4.5 Configuration And Administration Manual

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.
Table 1.1, "GNBD Software Subsystem Components"
tems 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 ac-
cess 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 Multipath
• Chapter 3, GNBD Driver and Command Usage
• Chapter 4, Running GFS on a GNBD Server Node
GFS
Components
gnbd.ko
gnbd_export
gnbd_import
gnbd_serv
1
summarizes the GNBD software subsys-
Description
Kernel module that implements the GN-
BD 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.