OCFS2 Integration with HP Serviceguard for Linux Release Notes, First Edition, November 2008

2 Features in This Release
Following are the features of this release:
• “Automated Process of Configuring the OCFS2 Cluster” (page 9)
• “HP Serviceguard for Linux and OCFS2 Co-existence” (page 9)
• “Administrative Commands for Managing the OCFS2 Cluster” (page 9)
Automated Process of Configuring the OCFS2 Cluster
In an environment that has HP Serviceguard for Linux already configured, installing and
configuring a cluster file system could involve additional configuration steps. If the configuration
is complicated, with several commands, it involves a considerable amount of time and resource
investment. However, with this solution, the installation process is simple and the configuration
procedures are completely automated. So you save on time and you can get your OCFS2 cluster
up and running in your Linux environment quickly.
Following are the parameters that are configured:
• O2NET_IDLE_TIMEOUT
• O2CB_HEARTBEAT_THRESHOLD
• O2CB_KEEPALIVE_DELAY_MS
• O2CB_RECONNECT_DELAY_MS
These parameters and the timeout values are stored in the file /etc/sysconfig/o2cb on all
the cluster nodes.
For more information on these parameters, see the OCFS2 Integration with HP Serviceguard for
Linux Administrator's Guide available with this release.
This document is also available at the following location:
http://www.docs.hp.com -> High Availability -> Serviceguard for Linux
HP Serviceguard for Linux and OCFS2 Co-existence
After configuring OCFS2 in the Serviceguard environment, you can manage the OCFS2 cluster
using Serviceguard resources such as the System Multi-node package, and the Mount point
package.
The System Multi-node package can be used to start the OCFS2 stack on all the nodes in the
cluster. Also referred to as the SG-OCFS2-pkg, the System Multi-node package controls the
OCFS2 timeout values, creates the cluster configuration and controls the cluster.
The OCFS2 Mount Point Packages control disks that contain the cluster file system. These Mount
Point Packages are created with the default name, SG-OCFS2-MP-#. However, you can also
create these packages with a different name. These packages mount and un-mount disks that
contain the cluster file system on multiple nodes from where the file system can be accessed
simultaneously.
Administrative Commands for Managing the OCFS2 Cluster
In an HP Serviceguard for Linux and OCFS2 environment, a set of administrative commands
are available to you to manage the OCFS2 cluster. You can use the Serviceguard resources to
manage the OCFS2 cluster. Commands such as ocfs2cluster and ocfs2mntadm help you
create and manage the cluster resources. You can use the ocfs2cluster command to create
and manage system multi-node packages and you can use the ocfs2mntadm command to create
and manage mount point multi-node package.
For more information on using these commands, see OCFS2 Integration with HP Serviceguard for
Linux Administrator's Guide available with this release.
Automated Process of Configuring the OCFS2 Cluster 9