Last updated on MARCH 08, 2017
Applies to:Linux OS - Version Oracle Linux 5.8 with Unbreakable Enterprise Kernel [2.6.39] and later
Version 1.8 of OCFS2 introduced the "Global Heartbeat" feature. See "The OCFS2 Global Heartbeat feature [ID 1552519.1]" for an overview.
This document shows examples of defining multiple nodes to a global heartbeat cluster, and dynamically adding a node to such a cluster. In the example, three heartbeat regions are defined for the global heartbeat in order to avoid a single point of failure. Although the minimum requirement is one volume, a minimum of three cluster-heartbeat volumes is recommended where there will be a significant number of ocfs2 volumes mounted in a cluster.
Please note that ocfs2-1.8 kernel driver is only provided with Oracle "UEK" Release 2 or later (kernel version 2.6.39 or later).
Refer to "Oracle Cluster File System (OCFS2) Software Support and Update Policy for Red Hat Enterprise Linux Supported by Red Hat [ID 1253272.1]" for further information.
OL5, OL6 and OL7 nodes with either 32bit or 64bit (OL7: 64bit only) UEK kernels can participate in a single Global Cluster.
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