Software-defined data center ( SDDC ; also: virtual data center VDC) is a marketing term That extends virtualization concepts Such As abstraction, pooling, and automation to all data center resources and services to accomplish achieve IT as a service (ITaaS).  In a software-defined data center, “all elements of the infrastructure – networking, storage, CPU and security – are virtualized and delivered as a service.”  While ITaaS may represent an outcome of SDDC, SDDC is differently cast [ by whom? ] To integrators and datacenter builders rather than to tenants. Software awareness in the infrastructure is not visible to tenants.
SDDC support can be claimed by a wide variety of approaches. Critics see the software-defined data center as a marketing tool and “software-defined hype,” noting this variability. 
Description and core components
The software-defined data center encompasses a variety of concepts and data-center infrastructure components, with each component potentially provisioned , operated, and managed through an application programming interface (API).  Core architectural components that include the software-defined data center  include the following:
- Computer virtualization ,  – a software implementation of a computer
- Software-defined networking (SDN), qui includes network virtualization – the process of merging hardware and software resources and networking functionality into a software-based virtual network 
- Software-defined storage (SDS), which includes storage virtualization , SLAs (Service Level Agreements) for storage, including performance and durability
- Management and automation software, enabling an administrator to provide, control, and manage all software-defined data-center components 
A software-defined data center from a private cloud , since a virtual private machine , [ citation needed ] beneath which it could use traditional provisioning and management. Instead, SDDC concepts imagine a data center that can encompass private, public, and hybrid clouds. 
Origins and development
Data centers traditionally lacked the capacity to accommodate total virtualization. 
By 2013, companies began laying the foundation for software-defined data centers with virtualization.  Ben Cherian of Midokura considers Amazon Web Services as a catalyst for the move to software-defined data centers because it
Convinced the world that the data center could be abstracted into much smaller units and could be treated as disposable pieces of technology, which in turn could be priced as a utility. Vendors watched Amazon closely and saw how this could apply to the data center of the future. 
In 2013, the software-defined data center was promoted as a paradigm shift.   The promise of the software-defined data center that would not be necessary to rely on special hardware or hire consultants to install and program hardware in its specialized language.  Rather, IT applications and will define all of the resources They require-Including compute, storage, networking, security, and availability-and group all of the components required to create a “logical application.” 
Commonly cited benefits of software-defined data centers include improved efficiency  from extending virtualization throughout the data center; Increased agility  from provisioning applications quickly; Improved control over application availability and security through policy-based governance; And the flexibility   to run new and existing applications in multiple platforms and clouds.
In addition, a software-defined data center implementation could reduce the company’s energy usage by enabling servers and other data center hardware to run at decreased power levels or be turned off.  Some believe that software-defined data centers improve security by giving organizations more control over their hosted data and security levels, compared to security provided by hosted-cloud providers. 
The software-defined data center was designed to allow users to access and manage their data. 
 Some critics believe that only a minority of people have access to the software. Of companies with “completely homogeneous IT systems” “already in place, such as Yahoo! And Google , can transition to software-defined data centers. 
According to some observers, the data-processing technologies are not necessarily the same. Managing a mix of legacy and new applications; Or delivering service-level agreements (SLAs). 
Software-defined data center is a tool that can be used to analyze, analyze, analyze, analyze, analyze, analyze, analyze, analyze and analyze critical information.  However, companies, including VMware , Juniper Networks , Arista Networks , Cisco , and Microsoft , are currently supplying, extending, and moving across existing physical networks. 
Several competing network virtualization standards already existed by 2012.  Neutron, the networking component of the open-source software OpenStack project, provides an application-level abstraction of network resources and includes an interface for configuring virtual switches.  
IT organizations to adapt. Software-defined environments require rethinking many IT processes-including automation, metering, and billing-and executing service delivery, service activation, and service assurance.  A widespread transition to the SDDC could take years. 
VMware acquired Pune -based software-defined data center security and operations firm Arkin, in 2016.  Other vendors have developed components and standards that enable a software-defined data center. The OpenDaylight Project Attracted media from vendors Including Avaya , H3C, 6Wind,  Arista Networks , Big Switch Networks , Brocade , Cisco, Citrix , Dell, Ericsson , Fujitsu , Hewlett Packard Company (HPE), IBM , Intel, Juniper Networks, Microsoft, NEC , Cloud Networks , Plexxi, PLUMgrid, and Red Hat .
Large-scale service providers such as Amazon and Savvis , which could potentially benefit from improved efficiencies through automation, are considered to be the organizations that are most likely to deploy full-scale software-defined data center implementations. 
For companies that have already deployed SDN in the data center many are now looking to expand those benefits to the WAN. A buzzword “software defined WAN” was used by vendors like CloudGenix,  VeloCloud and Viptela.
- Jump up^ Davidson, Emily A. “The Software-Defined-Data Center (SDDC): Concept Or Reality? [VMware]” . Softchoice Advisor Article . Softchoice Advisor. Retrieved 28 June 2013 .
- Jump up^ Rouse, Margaret. “Definition: Software Defined Datacenter” . Retrieved 25 February 2014 .
- ^ Jump up to:a b c d e f g Kovar, Joseph F. (13 May 2013). “Software-Defined Data Centers: Should You Jump On The Bandwagon?” . CRN . Retrieved 10 February 2014 .
- ^ Jump up to:a b c Cherian, Ben. “What Is The Software Defined Data Center And Why Is It Important?” . All Things D post . All Things D . Retrieved 28 June2013 .
- ^ Jump up to:a b c Volk, Torsten. “The Software-Defined Datacenter: Part 2 of 4 – Core Components” . EMA Blogs . EMA . Retrieved 28 June 2013 .
- Jump up^ “The software defined data center – part 2: compute” . CohesiveFT Blog post . CohesiveFT Blog . Retrieved 28 June 2013 .
- Jump up^ Marshall, David. “VMware’s software-defined data center will include NSX network virtualization” . InfoWorld article . InfoWorld . Retrieved 28 June 2013 .
- Jump up^ Otey, Michael (29 May 2013). “Moving Toward the Software-Defined Datacenter” . WindowsITPro . Retrieved 28 June 2013 .
- ^ Jump up to:a b c d e Knorr, Eric (13 August 2012). “What the software-defined data center really means” . InfoWorld . Retrieved 28 June 2013 .
- Jump up^ Paul Shread (25 July 2013). “Software-Defined Data Centers Could Change the IT Landscape” . Datamation . Retrieved 22 August 2016 .
- ^ Jump up to:a b Herrod, Steve. “Interop and the Software-Defined Datacenter” . VMware blog post . VMware . Retrieved 28 June 2013 .
- ^ Jump up to:a b Earls, Alan. “Is the software-defined data center ready for the mainstream?” . SearchDataCenter article . SearchDataCenter . Retrieved 28 June 2013 .
- ^ Jump up to:a b c d e f Venkatraman, Archana. “Software-defined datacenters demystified” . ComputerWeekly.com . ComputerWeekly.com . Retrieved 28 June 2013 .
- ^ Jump up to:a b Manca, Pete (29 May 2013). “Software-Defined Data Centers: What’s the Buzz All About?” . Wired . Retrieved 28 June 2013 .
- Jump up^ “Neutron’s developer documentation” . OpenStack . Retrieved 22 August 2016 .
- Jump up^ “VMWare to acquire Arkin net” . Economic Times. 13 June 2016 . Retrieved 15 June 2016 .
- Jump up^ Jeffrey Burt (2 May 2014). “Avaya, H3C, 6Wind Join OpenDaylight SDN Effort” . EWeek . EWeek . Retrieved 1 Feb 2015 .
- Jump up^ Knorr, Eric (8 April 2013). “OpenDaylight: A big step to the software-defined data center” . InfoWorld . Retrieved 28 June 2013 .
- Jump up^ “Startup CloudGenix Aims to Bring SDN to WAN” . eWeek. 2014-05-01 . Retrieved 2014-05-01 . ,