cloud computing (week5)

Content from:

Primary Textbook: Jamsa, K. A. (2013). Cloud computing: SaaS, PaaS, IaaS, virtualization, business models, mobile, security and more. Burlington, MA: Jones & Bartlett Learning.

Secondary Textbook: Erl, T., Mahmood, Z., & Puttini, R. (2014). Cloud computing: concepts, technology, & architecture. Upper Saddle River, NJ: Prentice Hall.

1

Learning Objectives

Define requirements for migrating an application to the cloud.

Describe the importance of backing up data before and after moving an application to the cloud.

Appreciate the benefit of using experienced consultants to assist with a cloud migration.

Describe an application in terms of its resource use.

Define and describe vendor lock-in and discuss ways to avoid it.

Describe the importance of training employees before, during, and after a cloud migration.

Describe the importance of establishing a realistic cloud-deployment schedule.

Discuss key budget factors impacted by the cloud.

Discuss potential IT governance issues related to the cloud.

Define and describe cloud bursting.

Migration to the Cloud

An application can be moved to the cloud quickly.

There are a myriad of cloud-solution providers who will eagerly assist by giving you instant access to cloud-based servers, data storage, and support.

Like all IT projects, the process of moving an application to the cloud, or the process of creating and deploying a new cloud application, should be well planned.

System Requirements

All IT projects should begin with specific requirements. The process of taking an application to the cloud, known as cloud migration, is no exception. The cloud-migration process should start with defined requirements.

Common Cloud System Requirements

Data security and privacy requirements

Site capacity plan—the resources that the application initially needs to operate

Scalability requirements—the measurable factors that should drive scaling events

System uptime requirements

Business continuity and disaster requirements

Budget requirements

Operating system and programming language requirements

Common Cloud System Requirements Continued

Type of cloud: public, private, or hybrid

Single- or multitenant solution requirements

Data backup requirements

Client device requirements, such as computer, tablet, or smartphone support

Training requirements

Help desk and support requirements

Governance and auditing requirements

Open source software requirements

Common Cloud System Requirements Continued

Programming API requirements

Dashboard and reporting requirements

Client access requirements

Data export requirements

Real World: CloudSwitch Cloud Migration

Many companies have enterprise-based applications that are widely used by their employees.

These applications, therefore, are mission critical.

CloudSwitch provides a downloadable application that companies can install within their data center and that securely maps the company’s on-site applications to a cloud-based solution in a matter of minutes.

Protect Your Existing Data

Before you begin your application migration to a cloud provider, make sure that you back up your data so that you can revert, if necessary, to a known point.

Then, be sure that you and the provider agree to the backup procedures that will be employed after they take control of your data.

It is easy to move a solution to a cloud provider. You need to ensure that it is equally easy to move out of the cloud if necessary.

Protect Your Data Privacy

If your company has specific privacy requirements, such as those of the Health Insurance Privacy and Portability Act (HIPAA) for health care, or of the Family Educational Rights and Privacy Act (FERPA) for education, have your provider state explicitly, in writing, its data privacy policies and procedures.

Use an Experienced Cloud Consultant

Moving a solution to the cloud is a learning experience.

The process has many options and a wide range of potential pitfalls.

Many companies provide consultants who are experienced in the cloud migration process.

Before you begin your application’s migration to the cloud, you should consider hiring a consultant. In most cases, you will find that hiring a consultant saves you money in the end and helps you avoid costly mistakes.

Know Your Application’s Current Characteristics

Before you move your application to the cloud and risk facing scaling issues, be sure that you monitor your application to identify its key performance indicators.

Common Characteristics

Demand periods—Does the application have periods of high or low demand, such as 8 a.m. to 5 p.m.?

Average users—How many users typically use the system simultaneously?

Disk-storage requirements—What are the application’s typical disk-storage needs? Are the files permanent or temporary? Are most operations read or write operations?

Common Characteristics Continued

Database-storage requirements—What are the application’s database requirements? Is the database replicated in real time? What is the application’s database read/write ratio?

RAM use—What is the application’s range of physical and virtual memory use?

Bandwidth consumption—What is the application’s bandwidth requirement?

Caching—How does the application currently cache data?

Remember Vendor Lock-In

Occurs when a vendor makes it difficult for a company to switch to another provider, even if the vendor has failed to fulfill the SLA.

This lock-in may occur because the vendor is unable to export data completely, or because the vendor provides services its competitors do not.

A cloud-service provider should make it easy for clients to move to another provider in the event that the provider fails to meet one or more of the SLA requirements.

Real World: Kayako Help Desk Solutions

Change-management consultants often cite the integration of a trained help desk staff as key to an application’s successful integration. Kayako, provides a variety of key help desk tools that a company should consider before migrating a solution to the cloud:

Support ticket management

Ticket escalation support

Live support desk chat software

VoIP phone integration

Remote computer access

Define Your Training Requirements

To reduce employee stress during an application’s migration to the cloud and to increase employee productivity with the cloud-based tools, you should consider training before, during, and after the cloud migration.

Training Requirements

Employee preparedness for the SaaS solution

Developer training on the solution APIs

Administrator training for cloud-based operations

IT-audit group training for corporate governance issues and internal controls

Help desk support preparedness training

Business continuity and disaster preparedness training

Real World: RightScale Cloud Application Management

RightScale provides a fully automated cloud-management platform that lets companies deploy cloud-based solutions across one or more clouds.

RightScale provides its cloud-management software as an SaaS solution that lets customers deploy and manage their solutions quickly.

The RightScale website also features valuable videos, white papers, and forums that focus on cloud computing.

Establish a Realistic Deployment Schedule

Cloud providers can quickly deploy solutions.

You should set a deployment schedule that provides sufficient time for training, testing, and benchmarking.

Many organizations will use a beta-like release schedule that gives employees a prerelease chance to interact with the software and provide feedback.

The testing period may provide time for the company to establish early system-performance benchmarks.

Budget Factors

Current data center costs breakdown, including:

Rent

Power and air conditioning

Collocation costs

Server costs

Data storage costs

Network costs

Budget Factors Continued

Current payroll costs for existing site administrators and projections for possible staff reduction opportunities

Current costs for software licenses that may shift to the cloud, and the (lower) projected cloud-based costs for the software

Current payroll costs for patch management and software version updates

Current hardware maintenance costs

Real World: GoGrid Hosting

GoGrid is a very large IaaS solution provider that provides scalable solutions to thousands of customers.

At GoGrid, customers can acquire on-demand solutions for physical, virtual, or hybrid servers at cost effective pricing levels.

Additionally, GoGrid offers solutions for load balancing, collocation, and cloud-based data storage.

IT Governance

Before you migrate an application to the cloud, consider the following governance requirements:

Identify how the cloud solution aligns with the company’s business strategy.

Identify and define the internal and external controls the company will need within the application, and at what control points, in order to validate that the application is performing correctly and is free from possible external modification.

Describe risks the IT staff is trying to mitigate and ways the cloud can help.

IT Governance Continued

Describe who within the company will have access to data within the cloud and how they will get it.

Determine who within the cloud provider’s organization will have access to data within the cloud and how they will get it.

Discover how the cloud provider logs errors and system events and how you can access them.

Determine how and when the cloud provider performs system updates and patches.

Discover which performance-monitoring tools are available for your use.

Cloud Bursting

When an on-site application encounters increased user demand, the application expands into the cloud.

When the user demand declines, the application leaves the cloud.

Cloud bursting is most common for seasonal demand, or event-driven demand, such as the load on Google Maps when an earthquake or other natural disaster occurs.

Cloud Bursting Continued

Cloud bursting lets a company extend an on-site application into the cloud to scale temporarily to meet user demand.