1.3. Running LVM in a Cluster
clmvddaemon is the key clustering extension to LVM. The
clvmddaemon runs in each cluster computer and distributes LVM metadata updates in a cluster, presenting each cluster computer with the same view of the logical volumes.
Figure 1.2. CLVM Overview
clvmd) or the High Availability Logical Volume Management agents (HA-LVM). If you are not able to use either the
clvmddaemon or HA-LVM for operational reasons or because you do not have the correct entitlements, you must not use single-instance LVM on the shared disk as this may result in data corruption. If you have any concerns please contact your Red Hat service representative.
lvm.conffile for cluster-wide locking. For information on configuring the
lvm.conffile to support CLVM, see Section 3.1, “Creating LVM Volumes in a Cluster”.