mpadmin Objects, Attributes, and Contexts

mpadmin Objects and Attributes

From the perspective of mpadmin, a Sun HPC cluster consists of a system of objects, which include

• The cluster itself

• Each node contained in the cluster

• Each partition (logical group of nodes) defined in the cluster

• The net work interfaces used by the nodes

Each type of object has a set of attributes whose values can be operated on via mpadmin commands. These attributes control various aspects of their respective objects. For example, a node's enabled attribute can be

• set to make the node available for use

• unset to prevent it from being used

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  Note -

  The CRE sets many attributes in a cluster to default values each time it boots up. Except for attribute modifications described here and in Chapter 6, mpadmin: Detailed Description, do not change attribute values.

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mpadmin Contexts

mpadmin commands are organized into four contexts, which correspond to the four types of mpadmin objects. These contexts are summarized below and illustrated in Figure 3-1.

• Cluster - These commands affect cluster attributes.

• Node - These commands affect node attributes.

• Network - These commands affect network interface attributes.

• Partition - These commands affect partition attributes.

Figure 3-1 mpadmin Contexts