Use the mkfs.ocfs2 command to create an OCFS2 volume on a device. You cannot use this utility to overwrite an existing volume that is mounted by...
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What Are O2CB Cluster Timeouts….
In addition to configuring the cluster layout in the /etc/ocfs2/cluster.conf file, the O2CB cluster stack configuration consists of cluster timeout configuration. O2CB has four configurable cluster...
Continue reading...Understanding OCFS2 Heartbeat….
The O2CB cluster stack uses a heartbeat to determine whether a node is dead or alive. Connectivity of nodes and storage devices must be assured to...
Continue reading...o2cb Utility….
Use the o2cb utility to add, remove, and list information in the cluster layout configuration file. You can also use this utility to register and unregister...
Continue reading...Cluster Layout Configuration File – OCFS2….
By default, the cluster layout configuration file for OCFS2 is /etc/ocfs2/cluster.conf. It is not necessary to configure this file when mounting an OCFS2 volume on a...
Continue reading...Kernel Configuration For OCFS….
There are two configurations needed for O2CB cluster stack to work properly. The first kernel setting is panic_on_oops, which you must enable to change a kernel...
Continue reading...OCFS2 Software….
OCFS2 software has a kernel component and a user-space component: Kernel – The kernel component is bundled with the Unbreakable Enterprise Kernel beginning with Oracle Linux...
Continue reading...Let’s Prepare For OCFS2….
So let’s understand a sample configuration with shared storage for cluster nodes, a private network between the nodes (192.168.1.), and the requirement to allow access...
Continue reading...OCFS, Features Part 2….
Here are some more features of OCFS2, Advanced Security – Supports POSIX ACLs and SELinux in addition to the traditional file access permission model. Use the...
Continue reading...OCFS2- Few Features, Part 1….
Here are some features of OCFS2, Variable Block and Cluster Sizes – OCFS2 has two main allocation units, blocks and clusters. OCFS2 supports block sizes ranging...
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