S
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Scalability
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Ability to incrementally add one or more systems to an existing cluster when the overall load of the cluster exceeds its capabilities.
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Server application
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Application software running on a cluster node, regardless of whether it does service registration.
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Service
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Data or operation made available to network clients through a virtual server, a resource group that contains a Network Name resource as well as an IP Address resource. Not necessarily a Microsoft® Windows NT® Service.
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Shared device model
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See Shared disk model.
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Shared disk model
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Clustering architecture where all systems share devices.
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Shared memory model
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Clustering architecture where all systems share a single main memory through which all traffic between devices must flow.
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Shared nothing model
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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. Cluster Server uses shared nothing clusters.
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Shared resource
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Cluster organization in which some resources are accessible to all systems in the cluster.
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Small Computer System Interface (SCSI)
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A protocol for connecting devices from several classes of peripherals to a host system without requiring modifications to hardware and software.
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SMB share resource
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See File Share resource.
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Symmetric Multiprocessing (SMP)
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A computer architecture in which multiple processors share global memory and a single copy of the operating system. Application processes run as if they were on a single processor system.
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System
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See Node.