Cloud Computing Lesson 2

Cloud Computing Basics 2

​Objectives

​Describe the functionalities of storage and database. 2. Describe database as a service in cloud computing, its advantage and disadvantage. 3. Identify client/server computing and its components.

​Applications

​What does cloud computing actually do?

​We have applications running on our laptops, servers, phones and the like. Cloud computing either has them too or has the potential to bring them to you. Cloud computing brings you applications, a way of viewing, manipulating, and sharing data. The most common are storage and database.

Multiple Choice

Which component of cloud computing brings users viewing, manipulating, and sharing data?

• Applications

• Storage

• Internet

• Devices

​Storage

​One of the uses for cloud computing is simply storage. The benefits are in line with the general benefits of cloud computing—if you lease storage space from a vendor, you are not responsible to buy the equipment, pay to run it, and pay to maintain it. That’s all on the supplier. But there are different options when it comes down to cloud storage.

Multiple Choice

What type of technology is used generally for storage in cloud computing?

• Computers

• File Systems

• Databases

• Wireless

Multiple Choice

What do cloud vendors provide for storage space?

• Equipment for storage

• Services to run the hardware

• Both

​Storage Database

​Databases are repositories for information with links within the information that help make the data searchable. Distributed databases, like Amazon’s SimpleDB, spread information among physically dispersed hardware. But to the client, the Information seems to be located in one place.

​Storage Database

​The advantages of such a database include the following: • Improved availability If there is a fault in one database system, it will only affect one fragment of the information, not the entire database. • Improved performance Data is located near the site with the greatest demand and the database systems are parallelized, which allows the load to be balanced among the servers. • Price It is less expensive to create a network of smaller computers with the power of one large one. • Flexibility Systems can be changed and modified without harm to the entire database.

Multiple Choice

Which of the following is an advantage of databases?

• Complexity

• Price

• Integrity

Storage Database

​

​Naturally there are disadvantages, including

• Complexity Database administrators have extra work to do to maintain the system.

• Labour costs With that added complexity comes the need for more workers on the payroll.

• Security Database fragments must be secured and so must the sites housing the fragments.

• Integrity It may be difficult to maintain the integrity of the database if it is too complex or changes too quickly.

• Standards There are currently no standards to convert a centralised database into a cloud solution.

Multiple Choice

Which of the following  is a disadvantage of databases?

• Need for more workers on the payroll

• Extra work to do to maintain the  system

• Both

Multiple Choice

True or False: In a IaaS, the database is run on a shared hardware platform.

• True

• False

​Storage Database services

​Another “as a service” offering that is becoming prevalent in the world of cloud computing is Database as a Service (DaaS). The idea behind DaaS is to avoid the complexity and cost of running your own database.

Multiple Choice

Why use a cloud database?

• Simplicity

• Flexibility

• Scalability

• All of the answers

​Storage Database services

​DaaS offers these benefits: • Ease of use There are no servers to provision and no redundant systems to worry about. You don’t have to worry about buying, installing, and maintaining hardware for the database. • Power The database isn’t housed locally,but that doesn’t mean that it is not functional and effective. Depending on your vendor, you can get custom data validation to ensure accurate information. You can create and manage the database with ease.

Multiple Choice

What issues could arise from having a sensitive database in the cloud?

• Loss

• Security

• GDPR

• All of the answers

​Storage Database services

​DaaS offers these benefits:

•Integration The database can be integrated with your other services to provide more value and power. For instance, you can tie it in with calendars, email, and people to make your work more powerful.

• Management Because large databases benefit from constant pruning and optimisation, typically there are expensive resources dedicated to this task. With some DaaS offerings, this management can be provided as part of the service for much less expense. The provider will often use off shore labour pools to take advantage of lower labour costs there.

Poll

Which of the answers is not an advantage of DaaS?

• Integration

• Management

• Ease of use

• High cost

​Intranets and the cloud

​In this section we’ll talk about the merits of developing your own in-house “cloud” and what is used in its composition.

​COMPONENTS

​There are two main components in client/server computing: servers and thin or light clients. The servers house the applications your organisation needs to run, and the thin clients—which do not have hard drives—display the results.

​COMPONENTS

​The network map in Figure 1-5 shows how they are deployed.

Poll

So far I understand all of the topics

• Yes I agree

• I get most of it

• I am not sure

​HYPERVISOR APPLICATIONS

​Applications like VMware or Microsoft’s Hyper-V allow you to virtualize your servers so that multiple virtual servers can run on one physical server. These sorts of solutions provide the tools to supply a virtualised set of hardware to the guest operating system. They also make it possible to install different operating systems on the same machine.

Multiple Choice

What infrastructure requires a hypervisor to make it possible for installation of different operating systems on the same machine?

• Virtualisation

• Grid Computing

• Both

​HYPERVISOR APPLICATIONS

​A hypervisor is a process or a function to help admins isolate operating system and applications from the underlying hardware. Cloud computing uses it the most as it allows multiple guest operating systems (also known as virtual machines or VMs) to run simultaneously on a single host system.

Multiple Choice

True or False: A hypervisor allows you to virtualise your servers so  that multiple virtual servers can run on one physical server.

• True

• False

​“Cloud Computing is not only the future of computing, but the present and the entire past of computing."

​Task- Create an infographic or mind map of the information in the lesson today