Cloud Computing for Beginners

Cloud Computing is a model for enabling network access as a shared pool. This concept provides clients to store their data to third party data centre. It relies on sharing of resource over a network. It maximizes the effective use of shared resources. Resources available in cloud are not only used by multiple users but allocation happen based on demand. This approach helps clients and companies to reduce their cost.

When you read that a particular company is moving to cloud that means that they are not going to purchase any hardware/software or any technical CAPEX item and will the take those services via cloud.

There are many benefits we get as a company once we move to cloud.

• Data Centralization
• Cost Reductions
• Resource sharing
• Continuous Monitoring
• Easy Maintenance
• Reliability

Large companies which wanted to move to cloud they need to finalize that which kind of services theywanted to use.

•   IAAS (Infrastructure as a Service)
•   PAAS (Platform as a Service)
•   SAAS (Software as a service)

        IAAS

        If we go with Infrastructure as a service we get virtual machines, servers, storage and network

        PAAS

       If we go with platform as a service, we get a computing platform which includes OS, Environment for programming, database and servers. Software developer can built the code and execute

        SAAS

       If we go with software as a service then we can get the access of application software and databases. We can go with software and even can pay based on usage.

       Once we finalize what kind of services we are going to use we decide on deployment. Basically there are many deployment methods are available but three kind of deployment are very common  

•            Private Cloud
•            Public Cloud
•            Hybrid Cloud

         Private Cloud

         This deployment will be for a single organization, owner can decide whether that will be managed by company    people or nay third party. Once you feel like going on private cloud you need to decide what you are going to      do with your current infrastructure. This requires significant level of changes and this will be costly also.

         Public Cloud

         Public cloud services may be free and you can opt all the services which are open for public use. Services        which we used via public cloud go via non trusted network.

       Hybrid Cloud

       Hybrid cloud is a composition of two or more clouds (Private, Public or any other). System treats these different entities but will be bound together. This deployment helps system manager to identify services based on actual requirement. Hybrid cloud is one where IT organizations use public cloud computing resources to meet temporary capacity needs that cannot be met by the private cloud.

      

      Having said that there are some privacy and security issues which comes in the picture like

      Cloud computing poses privacy concerns because the service provider can access the data that is on the cloud at any time. It could accidentally or deliberately alter or even delete information. Many cloud providers can share information with third parties if necessary for purposes of law and order even without a warrant. Users can encrypt data that is processed or stored within the cloud to prevent unauthorized access.

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