Wednesday, 10 December 2014

The Software-Defined Data Center

Software-Defined Data Center.

May also be called software-defined datacenter (SDD) or virtual data center. Software-defined data center (SDDC) is the phrase used to refer to a data center where all infrastructure is virtualized and delivered as a service. 
Control of the data center is fully automated by software, meaning hardware configuration is maintained through intelligent software systems. This is in contrast to traditional data centers where the infrastructure is typically defined by hardware and devices.
Software-defined data centers are considered by many to be the next step in the evolution of virtualization and cloud computing as it provides a solution to support both legacy enterprise applications and new cloud computing services.

We need to first see what sort of the changes has been made in SDDC- 
On Following important aspects

Compute Virtualization

Modern software-defined compute (also known as server virtualization or simply “virtualization”) is the first step toward the Software-Defined Data Center. Introduced by VMware more than a decade ago, virtualization has become a standard technology implemented by the vast majority of data centers worldwide.
Conventionally deployed servers operate at less than 15 percent of capacity. Virtualization rewrites the entire equation. CPU and memory are decoupled from physical hardware, creating pools of resources for use wherever needed. Each virtualized application and its operating system are encapsulated in a separate, fully isolated software container called a virtual machine (VM). Many VMs can be run simultaneously on each server, putting the majority of hardware capacity to productive use. The results are transformative:
  • Superior performance
  • Higher availability
  • Significant savings
In the simplest terms, IT achieves a lot more with a lot less, at dramatically lower cost.
- See more at: http://www.vmware.com/software-defined-datacenter/compute.html#sthash.3mS6WjsR.dpuf

1) Computer Virtualization -
Modern software-defined compute (also known as server virtualization or simply “virtualization”) is the first step toward the Software-Defined Data Center. Introduced by VMware more than a decade ago, virtualization has become a standard technology implemented by the vast majority of data centers worldwide.
Conventionally deployed servers operate at less than 15 percent of capacity. Virtualization rewrites the entire equation. CPU and memory are decoupled from physical hardware, creating pools of resources for use wherever needed. Each virtualized application and its operating system are encapsulated in a separate, fully isolated software container called a virtual machine (VM). Many VMs can be run simultaneously on each server, putting the majority of hardware capacity to productive use. The results are trans formative:

  • Superior performance
  • Higher availability
  • Significant savings
In the simplest terms, IT achieves a lot more with a lot less, at dramatically lower cost.
 2) Network Virtualization vs. Software-Defined Networking (SDN) - 
As with server virtualization before it, network virtualization is a transformative architecture from VMware that overcomes previous limitations to deliver unprecedented performance, flexibility and economics.
In contrast to software-defined networking (SDN), in which hardware remains the driving force, VMware technology truly decouples network resources from underlying hardware. Virtualization principles are applied to physical network infrastructure, abstracting network services to create a flexible pool of transport capacity that can be allocated, utilized and repurposed on demand.

In a close analogy to the virtual machine, a virtual network is a software container that presents logical network components—logical switches, routers, firewalls, load balancers, VPNs and more—to connected workloads. These virtual networks are programmatically created, provisioned and managed, with the underlying physical network serving as a simple packet-forwarding backplane. Network and security services are allocated to each VM according to its needs, and stay attached to it as the VM moves among hosts in the dynamic virtualized environment. - See more at: http://www.vmware.com/software-defined-datacenter/networking-security.html#sthash.WPpi6YAC.dpuf
As with server virtualization before it, network virtualization is a transformative architecture from VMware that overcomes previous limitations to deliver  unprecedented performance, flexibility and economics.

In contrast to software-defined networking (SDN), in which hardware remains the driving force, VMware technology truly decouples network resources from underlying hardware. Virtualization principles are applied to physical network infrastructure, abstracting network services to create a flexible pool of transport capacity that can be allocated, utilized and repurposed on demand.

In a close analogy to the virtual machine, a virtual network is a software container that presents logical network components—logical switches, routers, firewalls, load balancers, VPNs and more—to connected workloads. These virtual networks are programmatically created, provisioned and managed, with the underlying physical network serving as a simple packet-forwarding backplane. Network and security services are allocated to each VM according to its needs, and stay attached to it as the VM moves among hosts in the dynamic virtualized environment.

3)Software-Defined Storage (SDS) 
Software-Defined Storage (SDS) is the vision that storage services are dynamically created and delivered per VM and controlled by policy. VMware’s SDS model shifts the operational model of storage from the bottoms-up array-centric approach of today’s storage to a tops-down VM-centric model. As a result storage services are precisely aligned with application requirements. - See more at: http://www.vmware.com/software-defined-datacenter/storage.html#sthash.0KdExNUj.dpuf
Software-Defined Storage (SDS) is the vision that storage services are dynamically created and delivered per VM and controlled by policy. VMware’s SDS model shifts the operational model of storage from the bottoms-up array-centric approach of today’s storage to a tops-down VM-centric model. As a result storage services are precisely aligned with application requirements. 

4)Unified Data Center Management Software
The fully virtualized data center is automated and managed by intelligent, policy-based data center management software, vastly simplifying governance and operations. A single, unified management platform lets you centrally monitor and administer all applications across physical geographies, heterogeneous infrastructure and hybrid clouds. You can deploy and manage workloads in physical, virtual and cloud environments with a unified management experience. IT becomes agile, elastic and responsive to a degree never before possible. - See more at: http://www.vmware.com/software-defined-datacenter/management.html#sthash.2VpYJfam.dpuf

The fully virtualized data center is automated and managed by intelligent, policy-based data center management software, vastly simplifying governance and operations. A single, unified management platform lets you centrally monitor and administer all applications across physical geographies, heterogeneous infrastructure and hybrid clouds. You can deploy and manage workloads in physical, virtual and cloud environments with a unified management experience. IT becomes agile, elastic and responsive to a degree never before possible.


Compute Virtualization

Modern software-defined compute (also known as server virtualization or simply “virtualization”) is the first step toward the Software-Defined Data Center. Introduced by VMware more than a decade ago, virtualization has become a standard technology implemented by the vast majority of data centers worldwide.

Conventionally deployed servers operate at less than 15 percent of capacity. Virtualization rewrites the entire equation. CPU and memory are decoupled from physical hardware, creating pools of resources for use wherever needed. Each virtualized application and its operating system are encapsulated in a separate, fully isolated software container called a virtual machine (VM). Many VMs can be run simultaneously on each server, putting the majority of hardware capacity to productive use. The results are transformative:
  • Superior performance
  • Higher availability
  • Significant savings
In the simplest terms, IT achieves a lot more with a lot less, at dramatically lower cost.
- See more at: http://www.vmware.com/software-defined-datacenter/compute.html#sthash.3mS6WjsR.dpuf

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