Glossary

CLI

Command-line interface. An interface comprised of various commands which are used to control

 

operating system responses.

DLL

Dynamic-link library.

failover

A role-reversal process where the backup Remote Copy volume group is converted to the primary

 

Remote Copy volume group.

FC

Fibre Channel. A network technology primarily used for storage networks.

GUI

Graphical User Interface.

heartbeat

A periodic synchronization signal issued by cluster software or hardware to indicate that a node

 

is an active member of the cluster.

host

A computer that runs user applications and uses (or potentially uses) one or more virtual disks

 

that are created and presented by the array controller.

JRE

Java Runtime Environment.

LUN

Logical unit number.

MSFC

Microsoft Failover Cluster

quorum

In Windows clustering: A cluster resource that has been configured to control the cluster,

 

maintaining essential cluster data and recovery information. In the event of a node failure, the

 

quorum acts as a tiebreaker and is transferred to a surviving node to ensure that data remains

 

consistent within the cluster.

SAN

Storage area network. A network of storage devices available to one or more servers.

split-brain

A state of data corruption that can occur if a cluster is re-formed as subclusters of nodes at each

syndrome

site, and each subcluster assumes authority, starting the same set of applications and modifying

 

the same data.

SPOCK

Single Point of Connectivity Knowledge website. SPOCK is the primary portal used to obtain

 

detailed information about supported HP StorageWorks product configurations.

storage system

A synonym of storage array and virtual array. A group of disks in one or more disk enclosures

 

combined with controller software that presents disk storage capacity as one or more virtual disks.

virtual volume

A virtual storage unit created by mapping data from one or more logical disks.

volume group

A group of virtual volumes that are logically related and for which there is a cross-volume ordering

 

of writes.

WWN

A 64- or 128-bit identifier that uniquely identifies the address of a component on the fabric.

28 Glossary

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HP Cluster Software manual Glossary, Cli

Cluster Software specifications

HP Cluster Software is a robust solution designed to enhance the reliability, availability, and scalability of computing environments in enterprise settings. This software is instrumental in managing clusters of servers, providing a unified framework that allows for efficient resource management, workload distribution, and high availability.

One of the main features of HP Cluster Software is its ability to deliver high availability through failover mechanisms. In the event of a hardware or software failure, the software automatically shifts workloads from the affected node to a standby node within the cluster, minimizing downtime. This feature is critical for organizations that require continuous access to their data and applications.

Scalability is another significant characteristic of HP Cluster Software. Organizations can easily add or remove nodes from the cluster without disrupting ongoing operations. This flexibility ensures that enterprises can adapt to changing workloads and resource demands efficiently, making it suitable for environments ranging from small businesses to large data centers.

Load balancing is a key technology employed by HP Cluster Software. It intelligently distributes workloads across the available nodes, optimizing resource utilization and ensuring that no single server is overwhelmed. By balancing the load, organizations can achieve better performance and enhance the response times of applications, which are essential for user satisfaction.

HP Cluster Software supports various clustering topologies, including active-active and active-passive configurations. This versatility allows organizations to choose the architecture that best fits their operational requirements. Additionally, the software integrates seamlessly with various HP and third-party hardware and software solutions, thus providing a holistic environment for managing IT resources.

Moreover, HP Cluster Software offers centralized management tools that simplify cluster administration. Administrators can monitor cluster performance, manage workloads, and configure settings all from a single interface. This ease of use reduces the complexity often associated with managing large clusters and empowers IT teams to respond rapidly to issues.

In summary, HP Cluster Software is an essential tool for organizations looking to enhance their IT infrastructure's availability, reliability, and performance. With its failover capabilities, scalability options, load balancing technology, and centralized management features, it stands out as a comprehensive solution for modern computing challenges.