Veritas™ Operations Manager LDom Capacity Management Add-on ...

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10 Overview of <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on 4.1 About Logical Domains (<strong>LDom</strong>s) cluster. Using the concept of organization entity, users can now group multiple such VCS clusters into one organization entity, and reserve <strong>LDom</strong>s on the nodes of these clusters. Why do you need <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on? In a typical datacenter, the task of capacity management for a large number of physical servers is challenging. The administrator needs a tool that can assist in <strong>LDom</strong>s provisioning in a pool of physical servers based on the resource requirements of the <strong>LDom</strong>s and the high availability (HA) requirements of the pool. The <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on allows the storage administrator to reserve server space for <strong>LDom</strong>s in advance, and prevents them from over-subscribing the available server resources. Note: <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on 4.1 is supported only on Veritas <strong>Operations</strong> <strong>Manager</strong> 4.0, and later. See “About organization entity” on page 10. See “Features of <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on” on page 11. See “Compliance violations in <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on” on page 12. See “Limitations of <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on” on page 13. See “Prerequisites for using <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on” on page 13. About Logical Domains (<strong>LDom</strong>s) Logical Domains (<strong>LDom</strong>s) is a technology that allocates resources such as processors, memory, disks, or network devices to logical containers. It manages these resources as logical domains within the physical host. The resulting <strong>LDom</strong> has its own operating system, and it manages resources independently. See “Reserving <strong>LDom</strong>s on clusters of an organization entity” on page 17. About organization entity In Veritas <strong>Operations</strong> <strong>Manager</strong>, an organization entity is a business entity of organization type. It is a collection of servers that have similar characteristics. The user needs to add the managed hosts to the organizational entity. The associated clusters are inherited automatically. The clusters are managed by VCS and you can reserve <strong>LDom</strong>s on these clusters. VCS manages each <strong>LDom</strong> as a resource or an application, and not as a VCS node. The Veritas <strong>Operations</strong> <strong>Manager</strong> lets you generate reports and enforce compliance criteria for the organizational
Overview of <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on 4.1 Features of <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on 11 entity. If any cluster node in an organization entity does not comply with the specified criteria, Veritas <strong>Operations</strong> <strong>Manager</strong> generates faults and risks. Note: No separate user interface element is provided to create a new Organizational Entity. You need to create a business entity of type organization, and mark it for the <strong>LDom</strong>s reservation. See “Enabling an organization entity for <strong>LDom</strong>s capacity planning” on page 15. See “Disabling an organization entity for <strong>LDom</strong>s capacity planning” on page 17. See “Reserving <strong>LDom</strong>s on clusters of an organization entity” on page 17. Features of <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on The <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on 4.1 provides you with the following features to manage <strong>LDom</strong>s reservation: ■ ■ ■ Mark the organization entity for <strong>LDom</strong> reservation. Reserve space for the <strong>LDom</strong>s on one, or more cluster of the selected organization entity. Define the compliance criteria when you mark an organization entity for the <strong>LDom</strong> reservation. Three parameters are used for the organization entity: ■ ■ Number of VCPUs or cores per server Memory per server ■ Number of spare servers: It is the allowed number of nodes in a cluster that can go offline without affecting the availability of <strong>LDom</strong>s on the cluster. When any server fails, all the <strong>LDom</strong>s running on that server can failover to one or more remaining nodes (including the spare server). For an organization entity, all cluster nodes must meet the compliance criteria. For example, all nodes must have same VCPU count in an organization entity. ■ Ability to select the best-fit cluster for the <strong>LDom</strong> reservation based on virtual machine’s resource requirement, and the available capacity of the cluster. When you allocate space for the <strong>LDom</strong>, the <strong>LDom</strong> <strong>Capacity</strong> <strong>Management</strong> <strong>Add</strong>-on provides you with the options to either completely exhaust the most consumed node, or distribute the load equally across multiple nodes in the clusters. The spare server option is important for mission-critical applications. It lets you set number of servers in an organization entity that can be used for <strong>LDom</strong> failover. This feature ensures that if a cluster node fails, all the <strong>LDom</strong>s configured on that node can failover to one or more of the remaining nodes.
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