Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.2, Overview

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Figure 1.12, “GFS and GNBD with a SAN” . SAN block storage is presented to network clients
as block storage devices by GNBD servers. From the perspective of a client application, storage
is accessed as if it were directly attached to the server in which the application is running.
Stored data is actually on the SAN. Storage devices and data can be equally shared by network
client applications. File locking and sharing functions are handled by GFS for each network
client.
Figure 1.12. GFS and GNBD with a SAN
5.3. Economy and Performance
Figure 1.13, “GFS and GNBD with Directly Connected Storage” shows how Linux client
applications can take advantage of an existing Ethernet topology to gain shared access to all
block storage devices. Client data files and file systems can be shared with GFS on each client.
Application failover can be fully automated with Red Hat Cluster Suite.
Economy and Performance
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