S

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

SCSI

See Small Computer System Interface.

scalability

A measure of how well a computer system can grow to meet increasing demands.

server application

The server side of the client-server model. The server waits for requests from its clients. When it receives a request, the server processes it and returns the requested information to the client.

server cluster

See failover cluster.

Server Cluster API

See Failover Cluster API.

server cluster object

See cluster object.

service

Data or operation made available to network clients through a failover cluster instance; not necessarily a service.

shared disk

A disk shared between multiple owners simultaneously. Failover cluster do not use shared disks. A cluster disk is owned by only one node at any point in time.

shared nothing model

Clustering architecture where systems share neither memory nor devices. Each processor has its own memory and a copy of the operating system. Connections between processors are optimized because messages are passed across a high-speed, dedicated bus. Server clusters implements this model.

shared resource

Cluster organization in which some resources are accessible to all systems in the cluster.

single point of failure

A single hardware or software component that prevents a cluster from functioning if the component fails. Administrators try to avoid single points of failure through redundancy and backup systems.

Small Computer System Interface (SCSI)

A protocol for connecting devices from several classes of peripherals to a host system without requiring modifications to hardware and software.

storage class resource

A data storage device that is accessible to all cluster nodes and that is able to operate as a cluster resource. An example of a storage class resource is the Physical Disk resource.

storage pool

A collection of storage class resources. For a storage pool to be clusterable, the pool must contain at least 3 physical disk resources. In addition, each physical disk resource in the storage pool cannot (1) have a storage capacity of 10 GB or less, (2) use thin provisioning, or (3) have a mix of storage spaces or other file systems (for example, NTFS).

stripe set

See disk striping.

system

See node.

 

 

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