System requirement to migrate to Cloud Infrastructure.

Technical system requirement for a Cloud IaaS ( Infrastructure as a Service ) at the client end can be determined after studying client's system architecture. Also, a proper knowledge about Cloud computing architecture can help CIO's and CTO's to plan to migrate to cloud or select a Cloud service provider. Client end hardware or On premise infrastructure includes four types of architecture which are business architecture, application architecture, database architecture and technical architecture. Enterprise architecture is a strategic decision and it is customized as per the business model and the processes followed. However, the component used in the architecture always remains the same. Most of the business are inclined towards hybrid model (a mix of both the private, public cloud infrastructure with the on premise infrastructure). The reason behind it is that some complex customized applications like that of ERP (Enterprise Resource Planning) are on premise based and it is difficult to integrate on Cloud. There should be a proper Cloud Computing comparison between two to three selected Cloud providers based on their operating environment and system compatibility. For example, Amazon Web Services (AWS) is perceived to be more compatible with open source operating systems while Microsoft Azure to be compatible with Windows operating system. AWS has some platform features, but, have not segregated like that of Microsoft Azure. Similarly, Oracle is meant for SaaS based system requirements in contrast to AWS and Azure.

The major components of an On premise IT architecture are Wide Area Network (WAN), Local Area Network (LAN), Servers and Operating environments, Internet and security. On premise server set up also depends on three components of servers like web server, application server and database server. For better and fast functioning of Information system, the servers should have load balancers for scaling up its computing and storage capacity. Operating environment of the Cloud provider should be compatible enough to help integrate with the enterprise level environment through a Interface. Enterprises should opt for a better platform by Cloud platform comparison between AWS, Google App Engine, Heroku and Azure specifically.

Most of the enterprises on premise IT infrastructure supports traditional IT systems with hardware and software technologies from CISCO, RedHat, NetApp, EMC, VMware and Microsoft. So, Cloud service providers who cannot be able to make their cloud infrastructure compatible with these technologies will definitely stand out of the cloud computing race. In short, Cloud providers should be able to support a data center's existing infrastructure. Service offering by Cloud providers should be properly quantified and defined to ease and help the end users to administer properly. Service offerings should include resource guarantees, metering rules, resource management and billing cycles. This defined services helps in fast integration and migration to cloud. Management solutions should have the ability to create policies around workload and data management to ensure that maximum efficiency and performance is delivered. Traditional data centers use many tools for data provisioning, customer care, billing, systems management, directory, security and many more. Cloud Computing must integrate with application programming interface (API) and then into existing operation, administration maintenance and provisioning systems. These traditional data centers includes both virtualization tools and data center management tools. The end user, administrator and developer interfaces has to be simple and in sync for proper co-ordination after migrating to cloud infrastructure.

Cloud hosting comparison is inevitable for enterprises whenever they decide to make a plan to migrate to Cloud IaaS. Lack of proper planning can jeopardize the whole information system and the enterprise might bear an irreparable damage for not complying with the system requirement standards.

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