Few Questions before you start learning Oracle cloud

1.What is bare metal cloud

Bare metal cloud is an environment in which physical, dedicated servers can be provisioned to customers with cloud-like ease and speed. Bare metal cloud customers are given access to the entire processing power of individual servers, as well as any storage, networking or other services they require.
Within a bare metal infrastructure there is no multi-tenanting (sharing of machines) and the servers provisioned are not virtual ones created on top of any hyper-visor.

Customers of bare metal cloud are free to use their dedicated servers in any way they want, including running any OS and applications as well as installing hypervisors to create their own virtual machines if they want.
And bare metal cloud is provided as a service, with monthly payments and on-demand flexibility.

In Short: Instead of buying separate hardware for your organization , you will pay or rent your infrastructure.


2.what is hypervisor?

 A hypervisor or virtual machine monitor (VMM) is computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine. The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems. Multiple instances of a variety of operating systems may share the virtualized hardware resources: for example, Linux, Windows, and macOS instances can all run on a single physical x86 machine. This contrasts with operating-system-level virtualization, where all instances (usually called containers) must share a single kernel, though the guest operating systems can differ in user space, such as different Linux distributions with the same kernel...

Eg: You will install VMware on your laptop and run multiple OS , so your laptop is a host which is a hypervisor

3. what is What do EC2, S3 and LAMP stand for?

 EC2 stands for Elastic Cloud Compute from Amazon and Equivalent to that in Oracle is Oracle Compute Cloud
 S3 stands for Simple Storage Service from Amazon and equivalent to that from Oracle is Oracle Storage Cloud
 LAMP stands for Linux Apache MySQL PHP.


 4.How the billing varies in cloud?

 The billing in cloud varies with metered and non-metered like hourly and monthly billing.

 5.What are the different types of cloud?
 private, managed private, hosted private community ,public and hybrid.
 Oracle provides SaaS,PaaS,IaaS

 6.What all the DB versions of oracle supported in oracle cloud DBCS?
 11g,12cR1 AND 12cR2 and 18C


 7.Is it possible to migrate from 11g on premise to 12c PDB on oracle cloud DBCS?

 Direct migration is not possible , however we have to first upgrade 11g to 12C CDB on onpremise then you can migrate 12c CDB on premise to 12C PDB on DBCS

8. Please share some history about cloud ?
The concept of cloud have been there for a long since 1960 , but initiation of providing  cloud service started with Amazon

• Jul 2002 amazon web services started (third party sites), that means 3rd party sites can be levied  to use Amazon to  sell their products, it is available through XML and SOAP
• Mar 2006 Amazon S3 launched that means storage will be given to developers 
• Aug 2006 : EC2 have been launched (something like virtual storage which we can create during VM installed in our laptop ), it supports intel hardware, however oracle came with SPARC hardware 
• Oracle cloud have introduced bare metal cloud where as Amazon and others does not have 
• Apr 2008 google app engine , here users will  be provisioned with only google apps including google database 
• Nov 2009 windows azure 
• Dec 2013 : google compute engine, this supports other databases and services unlike google app engine 
• Jun2012 : oracle cloud  public cloud services have been launched 

9. What is public cloud ?

Public clouds are the most common way of deploying cloud computing. The cloud resources (like servers and storage) are owned and operated by a third-party cloud service provider and delivered over the Internet. Microsoft Azure is an example of a public cloud. With a public cloud, all hardware, software and other supporting infrastructure is owned and managed by the cloud provider. In a public cloud, you share the same hardware, storage and network devices with other organisations or cloud “tenants.” You access services and manage your account using a web browser. Public cloud deployments are frequently used to provide web-based email, online office applications, storage and testing and development environments.

10. what is private cloud?

A private cloud consists of computing resources used exclusively by one business or organisation. The private cloud can be physically located at your organisation’s on-site data-center or it can be hosted by a third-party service provider. But in a private cloud, the services and infrastructure are always maintained on a private network and the hardware and software are dedicated solely to your organisation. In this way, a private cloud can make it easier for an organisation to customize its resources to meet specific IT requirements. Private clouds are often used by government agencies, financial institutions, any other mid- to large-size organisations with business-critical operations seeking enhanced control over their environment.

11. What is hybrid Cloud?

Often called “the best of both worlds,” hybrid clouds combine on-premises infrastructure, or private clouds, with public clouds so organisations can reap the advantages of both. In a hybrid cloud, data and applications can move between private and public clouds for greater flexibility and more deployment options

12.  what is community cloud service?

A community cloud in computing is a collaborative effort in which infrastructure is shared between several organizations from a specific community with common concerns (security, compliance, jurisdiction, etc.), whether managed internally or by a third-party and hosted internally or externally.This is controlled and used by a group of organizations that have shared interest. The costs are spread over fewer users than a public cloud (but more than a private cloud), so only some of the cost savings potential of cloud computing are realized.