Glossary of Terms

Glossary of Terms

From converged infrastructure for the software-defined data center to advancements in virtual infrastructure management, we work in a space that’s constantly evolving. Need a vernacular refresh? Read on.

  • Aggregate

    In storage, its a logical grouping of one or more raid groups of physical disks. Raw storage, not directly presented to VM, OS, or application.

  • Amazon Web Services (AWS)

    Collection of computing services provided by Amazon that make up a cloud computing platform or PaaS

  • AWS

    Amazon Web Services

  • Bare metal hypervisor

    Virtualization platform that runs directly on the hardware and does not require a separate host operating system (e.g., Hyper-V, ESX Server, and Citrix XenServer) – also called “Type 1”

  • Central Processing Unit

    Hardware in a computer that performs the instructions outlined in software

  • CI

    Converged Infrastructure

  • CIFS

    Common Internet File System

  • CIM

    Converged Infrastructure Manager

  • Cloud

    Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. Cloud models may be public, private, or hybrid.

  • Cloud Management Platform (CMP)

    An integrated set of management capabilities that provide automation using business rules, policies and templates to eliminate the need for developers and users to know how to manage individual cloud or infrastructure elements

  • Cluster

    A logical contains of Hosts, typically deployed with fault tolerance and high availability

  • CMP

    Cloud Management Platform

  • Common Internet File System (CIFS)

    A subset of Server Message Block (SMB) that provides a distributed file systems allowing machine to machine file access over a network, commonly used my the Microsoft family of OSs

  • Converged Infrastructure (CI)

    Packaging of multiple disparate IT infrastructure components (compute, storage, networking) into a single logical unit, usually supported by a vendor validated reference architecture design for a specific application purpose (e.g. VMware virtualization, Microsoft Exchange Services, or SAP Hana)

  • CPU

    Central Processing Unit

  • DAS

    Direct Attached Storage

  • Direct Attached Storage (DAS)

    Storage devices that are directly attached to the compute resource using it as opposed to attached over SAN or use of NAS

  • Disk Array

    Hardware construct that contains a number of individual disks or a logical management container of individual disks

  • EC2

    Elastic Cloud 2

  • Elastic Cloud 2 (EC2)

    AWS Service that provides public cloud computing

  • Fault Tolerance (FT)

    A model of deployment that attempts to ensure no service interruption. VMware vSphere specific feature (FT) that provides VM redundancy by keeping a running clone of a virtual machine that can be switched to should the primary fail.

  • FC

    Fiber Channel

  • Fiber Channel (FT)

    A networking technology for connecting computers to storage devices

  • FlexPod

    A converged infrastructure platform based on Cisco UCS compute, Cisco Nexus network switching, and NetApp storage

  • FT

    Fault Tolerance

  • Guest

    Synonym for Virtual Machine

  • HA

    High Availability

  • High Availability (HA)

    The characteristic of a system that defines the amount of functioning vs. non functioning time that’s typically defined by a number of significant digits that approach 100% (e.g. 99.99999). VMware specific feature (HA) that provides the ability for virtual machines to be restarted on remaining hosts in a cluster should there be a host failure.

  • Host

    Virtualization: The physical compute hardware that the hypervisor software runs on

  • HTML

    Hyper Text Markup Language

  • Hybrid Cloud

    A cloud deployment model that combines public and private cloud in a way that allows both models to be used in combination. Ideally the decision to use public vs. private is based on business requirements and cost vs. technology demands.

  • Hyper Text Markup Language (HTML)

    Main markup language used for creating web pages and what is interpreted by web browsers

  • Hypervisor

    The software that creates the virtualization layer and is responsible for running virtual machines (may be of Type 1 or Type 2)

  • Internet Protocol (IP)

    Principal network protocol for relaying data across a network and provides end-point addressing and routing functions

  • Internet Small Computer System Interface (iSCSI)

    An IP protocol that encapsulates SCSI for use over IP networks

  • IP

    Internet Protocol

  • iSCSI

    Internet Small Computer System Interface

  • IT as a Service (ITaaS)

    An operational model where the IT organization of an enterprise offers IT components as defined services vs. discrete components and services can be consumed and billed more like a utility

  • ITaaS

    IT as a Service

  • LDAP

    Lightweight Directory Access Protocol

  • Lightweight Directory Access Protocol (LDAP)

    An open, vendor-neutral, industry standard application protocol for accessing and maintaining distributed directory information services over a network

  • Live Migration

    The process of migrating a virtual machine from one host to another without interruption of the VM operation

  • Logical Unit Number (LUN)

    A number used to identify a logical unit, which is a device addressed by the SCSI protocol or protocols which encapsulate SCSI, such as Fiber Channel or iSCSI

  • LUN

    Logical Unit Number

  • NAS

    Network Attached Storage

  • Network Attached Storage (NAS)

    Storage connected to the Ethernet or IP network (e.g., NFS, CIFS)

  • Network File System (NFS)

    A distributed file system allowing machine to machine file access over a network

  • Network Interface Card (NIC)

    A computer hardware component that connects a computer to a network

  • NFS

    Network File System

  • NIC

    Network Interface Card/Controller

  • PaaS

    Platform as a Service

  • PDC

    StrataCloud Performance Data Collector

  • Performance Data Collector (PDC)

    StrataCloud VMC component that is responsible for collecting and storing performance metrics (time series data)

  • Platform as a Service

    A category of cloud services that provides a computing platform and a solution stack as a service (e.g., AWS)

  • Private Cloud

    A deployment model of cloud where the infrastructure resource is shared between entities (e.g., AWS)

  • Public Cloud

    A deployment of cloud where the infrastructure resource is not shared between entities (e.g., company datacenter, private hosted compute, or managed service)

  • RAID

    Redundant Array of Inexpensive Disks

  • RAM

    Random-access Memory

  • Random-access Memory (RAM)

    A form of computer data storage that allows predicable read/write access to the data

  • Raw Device Mapping (RDM)

    Method for enabling disk access in a virtual machine where the VM is directly connected to a LUN over a SAN

  • RDM

    Raw Device Mapping

  • Redundant Array of Inexpensive Disks (RAID)

    Method of combining multiple disks into a single logical entity for the purpose of increased performance and/or redundancy

  • SaaS

    Software as a Service

  • SAN

    Storage Area Network

  • SCSI

    Small Computer System Interface

  • SDDC

    Software-Defined Data Center

  • Secure Shell (SSH)

    Software that provides secure and encrypted access to an operating system over a network

  • Server Message Block (SMB)

    A application protocol used for providing shared access to files, printers, serial ports, and miscellaneous communications between nodes on a network and commonly used by the Microsoft family of OSs

  • Service Oriented Architecture (SOA)

    A software design and software architecture design pattern based on distinct pieces of software providing application functionality as services to other applications

  • SLI

    Software-Led Infrastructure

  • Small Computer System Interface (SCSI)

    A set of standards for connecting and transferring data between computers and storage devices

  • SMB

    Server Message Block

  • Snapshot – Storage

    A snapshot creates a recovery point at a specific time that can be used to return a storage object (disk, file, etc.) to its exact state at that time

  • Snapshot – VM

    A snapshot creates a recovery point at a specific time that can be used to return a virtual machine to its exact state at that time

  • SOA

    Service Oriented Architecture

  • Software as a Service (SaaS)

    A software licensing and delivery model in which software is licensed on a subscription basis and is hosted in a Cloud

  • Software-Defined Data Center (SDDC)

    A vision for IT infrastructure deployment and management that extends virtualization concepts such as abstraction, pooling, and automation to all of the data center’s resources and services to achieve IT as a service

  • Software-Led Infrastructure (SLI)

    Two datacenter technologies that form the underpinning for application portability and functionality, data placement, and automation within and between datacenters which is analogous to Software-Defined Data Center

  • SQL

    Structured Query Language

  • SSH

    Secure Shell

  • Storage Area Network (SAN)

    A network that attaches computer storage devices to servers and typically runs over Fiber Channel and data is accessed as blocks

  • storage vMotion

    VMware term for the process of migrating a virtual machines storage device from one storage service to another without interruption of the VM operation

  • Structured Query Language (SQL)

    A domain specific programing language designed for managing data held in a relational database

  • TCP

    Transmission Control Protocol

  • Transmission Control Protocol (TCP)

    A protocol that provides reliable and error checked delivery of data over a computer network and typically runs on top of the IP protocol

  • Type 1 Hypervisor

    See Bare Metal Hypervisor

  • Type 2 Hypervisor

    Virtualization platform that runs on top of a full operating system, with the hypervisor being a second software layer. The guest operating-systems run at the third level above the hardware (e.g., VMware Workstation and VirtualBox).

  • UDP

    User Datagram Protocol

  • User Datagram Protocol (UDP)

    A protocol that provides best effort delivers of data over a computer network and typically runs on top of the IP protocol

  • vBlock

    A converged infrastructure platform based on Cisco UCS compute, Cisco Nexus network switching, and EMC storage

  • vCenter Server

    VMware Management software for their vSphere virtualization platform

  • vCPU

    Virtual Central Processing Unit

  • vDC

    Virtual Data Center

  • vDisk

    Virtual Disk

  • VHD

    Virtual Hard Disk

  • Virtual Appliance

    A virtual machine packaged with a complete operating system and applications to provide a specific function and is analogous to physical compute appliances where the hardware and software have a dedicated purpose

  • Virtual Data Center (vDC)

    A logical container of virtualization resources

  • Virtual Disk

    A logical representation in software of the hardware concept of a disk (see Virtual Hardware)

  • Virtual Hard Disk (VHD)

    A file format used by the Microsoft hypervisor that serves as a container for virtualized hard disk drives

  • Virtual Hardware

    Software representation of computer components that is created and managed by a hypervisor (e.g. vNIC, vCPU, vDisk)

  • Virtual Machine (VM)

    An emulated computer system and hypervisors provide the emulation of real hardware

  • Virtual Machine Disk (VMDK)

    An open file format developed by VMware that serves as a container for virtualized hard disk drives (see VHD)

  • virtual Random-access Memory (vRAM)

    Unit of logical RAM allocation for virtual machines and created and managed by the hypervisor

  • Virtualization Management Center (VMC)

    StrataCloud software that provides virtualization management, capacity planning, and configuration management for VMware environments

  • Virtualization Query Language (VQL)

    A domain specific language developed by StrataCloud for describing, managing, and configuration of multi-vendor data center infrastructure components (e.g. compute, storage, networking, and virtualization)

  • VM

    Virtual Machine

  • VMC

    StrataCloud Virtualization Management Center

  • VMC Mosaic Server

    StrataCloud VMC component that combines multiple VMC instances into a single consolidated view and data aggregation is provided by the Mosaic server

  • VMC Reporting Engine (VRE)

    StrataCloud VMC component that provides business reporting functions and operates as a stand alone web interface for all reporting tasks

  • VMDK

    Virtual Machine Disk

  • vMotion

    VMware term for the process of migrating a virtual machine from one host to another without interruption of the VM operation.

  • vNIC

    Virtual Network Interface Card

  • Volume

    In storage, a partitioned space on an aggregate, sometimes called a disk partition. Volumes are presented to VM, OS, or applications.

  • VQL

    Virtualization Query Language

  • vRAM

    Virtual Random-access Memory

  • VRE

    StrataCloud VMC Reporting Engine

  • Web Service

    Method of providing machine-to-machine communication over a network, typically implemented in HTML