The Private Cloud in your Datacenter
A private cloud aims to deliver many of the characteristics of public cloud computing such as scalability and availability. With public cloud you have a pooling of shared infrastructure, a user self-service for automation, and higher levels of overall application/server availability and reliability. However, by taking a private cloud approach, organizations can deliver on these goals while still using their own physical resources allowing them to maintain complete control over their data and process.
Shared infrastructure, compute and storage are virtualized and pooled together. This makes the difference with the current approach of datacenters. In a private cloud infrastructure, application owners will only care that adequate capacity to run the application has been provided from the shared pool. Once this service is deployed, services can scale up and down based on demand and needs. This means that there is no more need of over-provision infrastructure capacity to accommodate the potential load.
Microsoft is closing the gap with VMware based on their improvements of virtualization. Besides improvements of Live Migration, there is also the possibility for machine replication and the possibility to have more Hyper-V clusters. All this is completely integrated with the new Virtual Machine Management of System Center 2012R2.
By giving application owners better visibility over their resource usage, organizations are able to deliver the right behavior more easily in order to conserve capacity where possible. A self-service interface to which standardized services are published from central IT, gives application owners and other internal customers the ability to easily provision resources when needed. Automation helps to provide efficiency in service delivery to lower the workload of the IT administrators.
A private cloud deployment is everything a public cloud is, with the ability that the both can work together as there are a lot of options to replicate your virtual environment into Azure public cloud for disaster recovery or test/DEV/UAT. Private cloud also allows organizations to maintain total control of their applications and data.
The private cloud model is closer to the more traditional model of individual local access networks (LANs) used in the past by enterprise but with the added advantages of virtualization. The features and benefits of private clouds therefore are:
- Higher security and privacy: public clouds services can implement a certain level of security but private clouds – using techniques such as distinct pools of resources with access restricted to connections made from behind one organization’s firewall, dedicated leased lines and/or on-site internal hosting – can ensure that operations are kept out of the reach of non-authorized people
- More control: as a private cloud is only accessible by a single organization, that organization will have the ability to configure and manage it in line with their needs to achieve a tailored network solution
- Cost and energy efficiency: implementing a private cloud model can improve the allocation of resources within an organization by ensuring that the availability of resources to individual departments/business functions can directly and flexibly respond to their demand. Therefore, although they are not as cost effective as a public cloud services due to smaller economies of scale and increased management costs, they do make more efficient use of the computing resource than traditional LANs as they minimize the investment into unused capacity. Not only does this provide a cost saving but it can reduce an organization’s carbon footprint too
- Improved reliability: even where resources (servers, networks etc.) are hosted internally, the creation of virtualized operating environments means that the network is more resilient to individual failures across the physical infrastructure. Virtual partitions can, for example, pull their resource from the remaining unaffected servers. In addition, where the cloud is hosted with a third party, the organization can still benefit from the physical security afforded to infrastructure hosted within data centers
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