Chapter 15. Clustering operations

This chapter discusses how to configure cluster storage containers (referred to throughout this chapter as "cluster containers"), a feature provided by the EVMS Cluster Segment Manager (CSM).

Disks that are physically accessible from all of the nodes of the cluster can be grouped together as a single manageable entity. EVMS storage objects can then be created using storage from these containers.

Ownership is assigned to a container to make the container either private or shared. A container that is owned by any one node of the cluster is called a private container. EVMS storage objects and storage volumes created using space from a private container are accessible from only the owning node.

A container that is owned by all the nodes in a cluster is called a shared container. EVMS storage objects and storage volumes created using space from a shared container are accessible from all nodes of the cluster simultaneously.

EVMS provides the tools to convert a private container to a shared container, and a shared container to a private container. EVMS also provides the flexibility to change the ownership of a private container from one cluster node to another cluster node.