Welcome!

@CloudExpo Authors: Elizabeth White, Liz McMillan, Ed Featherston, Dalibor Siroky, Pat Romanski

Related Topics: @CloudExpo

@CloudExpo: Tutorial

Introducing Cloud Computing: A Gentle Overview

Private cloud, public cloud, hybrid cloud and managed cloud

[Adopted from my BLOG December 2009]

Lately in the IT community all the hype is on Cloud Computing. We have small start-ups offering several variations of Cloud services as well as some of the established big players (Google, Amazon, IBM, Novell (aimed at cloud service providers),Sun) stepping up their offerings of cloud services.

But what exactly is Cloud Computing? Is it Virtualization? Is it services that we accessed via a web browser over the years, something totally new, or is it all of these,but  just rebranded?

The term Cloud Computing started gaining traction when Google and IBM launched a university initiative to address internet scale computing back in 2007.

These services has been evolving since the 90s and its previous incarnations can be said to be Grid and Utility computing and the Software as a Service offerings we saw around a decade ago.


Cloud Computing Journal - the Web's most widely Web resource on Cloud Computing

In a nutshell we can draw an analogy which can be stated as this: think of a utility service you use, say for example electricity. You get your meter read every few weeks and you receive a bill for energy consumed between readings.

The same underlying premise can be applied to a cloud service, an end user can subscribe for any of the offered cloud services and based on service usage from the provider be billed for consumption of that particular service or series of services for its specified time-frame.

Once can safely state that Cloud Computing as an on-demand, self-service, pay-as you go utility, evolved from a combination of grid computing, virtualization, and automation.

Experts estimate that this industry will grow to a 42 billion dollar industry by 2012, however the implementation and usage of cloud computing models and services is not without issues.

Most business managers will most likely consider the Capex and Opex aspects, especially in this economy. How much money an IT department can save yet still maintain operational efficiencies and security is a primary focus; by implementing one or more cloud computing services, an enterprise can obtain the scale and flexibility it needs and potentially save time as well with the concepts of dynamic provisioning of needed services.

One Cloud Computing claim is to lower costs, increase business agility and help increase the velocity at which applications can be deployed, however a good question to consider is can one expect its implementation to be disruptive and to what length?

In order to engage cloud computing services, business models will have to be adjusted or downright changed, in order to effectively and efficiently managing the utility aspect of computing power used in everyday operations and the manner in which management will be able to utilize resources.

As with any implementation, standards and regulation needs to be formulated and implemented in order to ensure that both vendor and the tenant are in compliance and within governance of an agreed format of policies.

As of now there are no formal standards directed solely toward cloud computing however NIST has proposed a potential framework standard called Standards Acceleration to Jumpstart Adoption of Cloud Computing (SAJAAC). With this, every effort should be made to ensure the confidentiality, availability and integrity of data held within a cloud computing environment going forward.

Definition:
The National Institute for Science and Technology (NIST) defines cloud computing as "a pay-per-use model for enabling available, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, services) that can be rapidly provisioned and released with minimal management effort or service provider interaction." [2]

Cloud Computing Models: Cloud models can be one of the following three:

  • Infrastructure as a Service (IaaS) e.g. Tier 3, Amazon EC2,while the subscriber does not control the cloud infrastructure they do have control over select portions of network e.g. firewalls, operating system, deployed applications and storage.
  • Platform as a Service (PaaS) this goes back to the early 70's when it was referred to as Framework as a Service. What is does is simply to provide different combinations of services to a subscriber supporting an application development life-cycle e.g. Google's App Engine which will let a subscriber run web applications on Google's infrastructure or Azure. In essence the subscriber will use programming(.Net Java python) and tools supplied by the service provider with no underlying responsibility for the cloud deployed network, severs, operating system and storage etc.
  • Software as a Service (SaaS) e.g. Facebook, Salesforce.com, applications running on a cloud infrastructure that can be accessed via a web browser interface.

Bear in mind that there can be dependencies and a relationship between the models as Infrastructure as a Service can be stated as the foundation of Cloud Computing services, upon which Platform as a Service and then Software as a Service is built upon.[3]

Delivery Methods:
these services can be implemented by the end user in four different manners :

1) Private Cloud aka a corporate cloud refers to proprietary computing architecture providing hosted services to a limited number of people which resides behind a corporate firewall, in other words a single tenant.

By using private clouds enterprises/tenants will receive the same economies of scale and bi-directional scaling as that of the public cloud user.

However being a single enterprise or division within that enterprise will ensure the additional benefit of more control and security for data held within the private cloud, as on-premise data centers can be converted into private clouds by implementing virtualization technologies from companies such as Microsoft, Citrix, VMware, Novell and Sun.

2) Public Cloud is the cloud that is provided for lease external to an entity's physical location e.g. Amazon's EC2.

This deployment facilitates rapid scaling via virtualization technologies (which enables cloud user resources an ability to rapidly start up and shut down,) and can be utilized by multiple tenants however; within this deployment users have no access to dedicated resources.

This results in users giving up a certain amount of control over the process, which in turn can raise security and compliance issues.

3) Hybrid Cloud is a mixture of the public and private. This can be appealing for a company that chose to store non confidential data externally say using Simple Storage Service (S3) whilst keeping private data in-house.

4) Managed Cloud -In this offering the physical infrastructure in operation is owned by the subscriber and can be housed within the physical premises of the subscriber.

However the service provider will control portions of management and security of the service utility.


Some Deployment Concerns
As with the deployment of any IT system there will be challenges and cause for concern. Certain scenarios will have to be anticipated and use cases as well as processes to mitigate these concerns need to be clarified. Some examples of concerns are as follows:

1) Software licenses: software is typically subscribed as those that are proprietary licensed or those that are free and open source licensed. Software licenses govern usage or redistribution of software which are in most cases copyright protected.

Something to consider is how software that you want to deploy into a cloud is licensed.
Is the software you want to deploy licensed on a per server basis or not and how will easy or difficult will deploying your software of choice into a cloud be?

Will proprietary software solutions need to be confined to dedicated hosting environments? Most likely yes, at least for now or until you can get a vendor who can securely provide the software you need on a pay as you go basis.

Because of how software licensing is structured early cloud users have been found to use more open source software.

2) Single point of failure: a mission critical application is deployed via a single vendor; issues at the vendor's site may severely impact the availability of resources for the tenant.

The vendor may claim to have multiple, remote backup locations completely powered However when it comes to ensuring that, in addition, redundant cloud administration and infrastructure software are in place, the vendor may fall short.

3) Portability: a cause for concern is that each vendor may utilize different applications APIs and formats for data. This in turn may limit application and data portability to other environments, as they are likely to be using proprietary APIs thus causing a "Lock In" situation where it will be easy to sign a contract and use a vendor service however transferring out to another vendor could have major issues.

Of course as the cloud computing environment evolves this may soon be remedied.

4) Security: the elephant in the cloud room. The most common fear with using a cloud deployment is a loss of control and security of data.

Granted this is still a system built on hard and software platforms and as such is still susceptible to the traditional security attacks (DOS, DDOS etc.), conversely a point for consideration should be that any security measure will be more cost effective when implemented on a larger scale.

Any good IT manager has voiced concerns over whether employees/administrators at the cloud provider can be trusted to not look at data or even modify it or, whether other customers sharing the cloud can hack data or access it without leaving an audit trail.

From this a tenant can ask about methods the vendor is employing to protect data such as high physical security as well as what types of monitoring, intrusion detection and firewall equipment are in place at their centers.

Even worse is whether competitors could find out sensitive information such as customer orders, pricing and cost information, and negatively impact business. And of course what about privacy concerns and government regulations?

Other issues of concern can be:

  • What levels of protection in place to protect one customer from accessing another customer's data or application within a shared cloud space?
  • Who will be liable for security breaches and how will the law regarding this in any one jurisdiction ensure compliance?
  • How well will a vendor system integrate with a tenant's security systems?


5) Scalability: Every user/potential user of the cloud constantly hear of the substantial savings they will realize by utilizing cloud-based resources.

In order to take full advantage of the scalability of the cloud there should be a means of ensuring that there is some form of dynamic measurement and resource management for applications held within a cloud.
Scalability within the cloud can be had by composing the service from other scalable services as can be seen with Google App Engine.


6) Auditing: With the cloud one has to consider how compliance with ISO standards, Sarbanes-Oxley, HIPAA ,PCI-DSS etc. will impact certain data from being deployed. This more so when considering the attractiveness of data to unauthorized entities and the methods they could use to gain access to that data.

Any IT manager will also tell you that without proper planning the cost of an audit can be higher than expected.

As of this writing, I am not aware of any formulated standards for auditing within the cloud, however I must state that for a business, auditing within the cloud may be an attractive option as, this can be done live with no down time or interruption to business processes.

7) Compliance: There are no standards in place as of yet, but the National Institute of Standards and Technology (NIST )and others are working toward that end.

8) Other Data Access: what happens to my data if the vendor revokes my access or there is a system malfunction? This is a common question that anyone thinking of using the cloud should ask. Remember the data loss for T-mobile customers using the services of Microsoft subsidiary - Danger? "Microsoft said any data that users had on their devices and is no longer there has almost certainly been permanently lost"[4] Here there was no revocation of access but an alleged system glitch.

A personal example occurred a few days ago when I tried to access a Gmail account I kept just for research and online backup.
The system message intimated that I had violated the "Terms of Agreement". What?! The Gmail account was hardly ever used to send email and the Google docs account was used as a second online backup for some of my documents and files. If this was not a secondary backup or not a backup at all, I would have lost access all my uploaded documents and files, with no recourse for resolution but filling out a form and hoping for contact from the support center.

In order to address and mitigate these issues the tenant should ensure that workarounds and backup plans are worked into their Service Level Agreements (SLAs) with the vendor.


Service Level Agreements (SLAs)
A service level agreement a part of a service contract where the level of service is formally defined. In practice, the term is sometimes used to refer to the contracted delivery time (of the service) or performance. [5] Whilst there may not be much flexibility with a vendor in defining an SLA, I am confident that the laws of supply and demand will shift this more toward the tenant in the near future.
Cloud computing vendors are getting into this business to affect their bottom line and shareholder value if publicly traded. At the end of the day their focus will be on making a profit on services offered.

In light of this most tenants may feel as though they are getting into an arrangement where it appears as though vendors create the SLAs for their own protection against litigation, with minimal assurances to a tenant.

That being said, this does not mean that an IT manager cannot make the SLA work as a tool to chose an appropriate service provider. An IT manager's main concern will be the security of data and of course, the traditional interpretation of the CIA triad (Confidentiality, Integrity and Availability) may not be applicable within their cloud service.

To start an IT manager can focus on the following when hammering out their SLA with a vendor:
1) Data Protection: where there is a clear definition as to who will have access to the data and the levels of protection in effect for their data.

Some questions that can be asked are:

  • How will data be encrypted?
  • How will compliance be addressed?
  • What are the levels of access control?
  • Will there be sub-contractors or third party providers processing the data?
  • Where are backups stored?
  • How is the data center secured?
  • What happens to the data if service providers are switched?
  • What processes are in place to mitigate legal inquiries about a customer's data?
  • How often are audits done and what types of auditing tools are in place?
  • What happens to my data if there is an investigation taking place on another tenant sharing services and how will you ensure my access to my data in the event of equipment seizure by federal entities?
  • How is data deletion handled?


2) Continuity: one has to consider what happens in the event of an outage or another related event that causes data to become unavailable.

Some questions to consider here are

  • How will the vendor define a services outage?
  • Will there be scheduled vendor downtime for maintenance etc.?
  • Will there be an alternative vendor hot site or vendor site prepped to take on load of access in the event of a vendor outage?
  • Are there tools in motion which will determine the severity of a vendor outage?
  • How will the tenant be compensated in the event of a vendor an outage?
  • Define levels of redundancy in place to minimize vendor outages?


3) Costs: on cost to consider are:

  • How is the vendor's fee structured and is taxes and external fees accounted for in a vendor quote?
  • Will there be or are there current licensing fees above and beyond stated vendor service fees?
  • Will there be any hidden or add on costs for vendor support?
  • How does the vendor structure their charges? Is it based upon usage, traffic or storage limit
  • Does the vendor offer price protection?


Conclusion
It is expected that Cloud Computing will the wave of the future in terms of computing, it is only logical that the cloud's economies of scale and flexibility will impact how technology evolves and how users of technologies implement these technologies.

However in terms of security the massive availability of resources and data within a cloud does present a very attractive target for attackers.
That being said, we can assume that cloud-based defences may be more robust, scalable and cost-effective, in an effort to mitigate security concerns regarding multiple tenants, encryption, trust and compliance.

Part of a cloud service is the API. However when it comes to integration between vendors this may pose a problem for tenants, given the fact that cloud APIs are not yet standardized. This means that each vendor has a specific APIs for managing its services that will lock customers to their vendors due to vendor proprietary technology.

The work around here would be to look for vendors that use standard APIs wherever possible. This is a viable option as standard APIs are already implemented for access to storage as well as deploying and scaling applications.

In terms of auditing and forensics, dedicated, pay-per-use forensic images of virtual machines can be obtained by an auditor without having to take infrastructure offline. This of course results in less down-time for auditing as well as it can provide cost-effective storage for logs without deterring system performance.

All of which will increase the return on investment as well as decrease operational costs normally involved with in house systems processing the same data as in the cloud.

Of course Cloud Computing is still in its infancy and whilst some proposals may look good in theory, only time will tell how we proceed and evolve with this system of computing.

References
[1] Cloud Connect
[2] NIST
[3] Cloud Security Alliance
[4] www.pcworld.com/businesscenter/article/173457/microsoft_loses_sidekick_u...
[5] http://en.wikipedia.org/wiki/Service_level_agreement

Cloud Computing journal
European Network and Information Security Agency.
Sun Microsystems
IBM
Google.com

More Stories By Jon Shende

Jon RG Shende is an executive with over 18 years of industry experience. He commenced his career, in the medical arena, then moved into the Oil and Gas environment where he was introduced to SCADA and network technologies,also becoming certified in Industrial Pump and Valve repairs. Jon gained global experience over his career working within several verticals to include pharma, medical sales and marketing services as well as within the technology services environment, eventually becoming the youngest VP of an international enterprise. He is a graduate of the University of Oxford, holds a Masters certificate in Business Administration, as well as an MSc in IT Security, specializing in Computer Crime and Forensics with a thesis on security in the Cloud. Jon, well versed with the technology startup and mid sized venture ecosystems, has contributed at the C and Senior Director level for former clients. As an IT Security Executive, Jon has experience with Virtualization,Strategy, Governance,Risk Management, Continuity and Compliance. He was an early adopter of web-services, web-based tools and successfully beta tested a remote assistance and support software for a major telecom. Within the realm of sales, marketing and business development, Jon earned commendations for turnaround strategies within the services and pharma industry. For one pharma contract he was responsibe for bringing low performing districts up to number 1 rankings for consecutive quarters; as well as outperforming quotas from 125% up to 314%. Part of this was achieved by working closely with sales and marketing teams to ensure message and product placement were on point. Professionally he is a Fellow of the BCS Chartered Institute for IT, an HITRUST Certified CSF Practitioner and holds the CITP and CRISC certifications.Jon Shende currently works as a Senior Director for a CSP. A recognised thought Leader, Jon has been invited to speak for the SANs Institute, has spoken at Cloud Expo in New York as well as sat on a panel at Cloud Expo Santa Clara, and has been an Ernst and Young CPE conference speaker. His personal blog is located at http://jonshende.blogspot.com/view/magazine "We are what we repeatedly do. Excellence, therefore, is not an act, but a habit."

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
"Storpool does only block-level storage so we do one thing extremely well. The growth in data is what drives the move to software-defined technologies in general and software-defined storage," explained Boyan Ivanov, CEO and co-founder at StorPool, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
As Marc Andreessen says software is eating the world. Everything is rapidly moving toward being software-defined – from our phones and cars through our washing machines to the datacenter. However, there are larger challenges when implementing software defined on a larger scale - when building software defined infrastructure. In his session at 16th Cloud Expo, Boyan Ivanov, CEO of StorPool, provided some practical insights on what, how and why when implementing "software-defined" in the datacent...
Blockchain. A day doesn’t seem to go by without seeing articles and discussions about the technology. According to PwC executive Seamus Cushley, approximately $1.4B has been invested in blockchain just last year. In Gartner’s recent hype cycle for emerging technologies, blockchain is approaching the peak. It is considered by Gartner as one of the ‘Key platform-enabling technologies to track.’ While there is a lot of ‘hype vs reality’ discussions going on, there is no arguing that blockchain is b...
Blockchain is a shared, secure record of exchange that establishes trust, accountability and transparency across business networks. Supported by the Linux Foundation's open source, open-standards based Hyperledger Project, Blockchain has the potential to improve regulatory compliance, reduce cost as well as advance trade. Are you curious about how Blockchain is built for business? In her session at 21st Cloud Expo, René Bostic, Technical VP of the IBM Cloud Unit in North America, discussed the b...
You know you need the cloud, but you’re hesitant to simply dump everything at Amazon since you know that not all workloads are suitable for cloud. You know that you want the kind of ease of use and scalability that you get with public cloud, but your applications are architected in a way that makes the public cloud a non-starter. You’re looking at private cloud solutions based on hyperconverged infrastructure, but you’re concerned with the limits inherent in those technologies.
Is advanced scheduling in Kubernetes achievable?Yes, however, how do you properly accommodate every real-life scenario that a Kubernetes user might encounter? How do you leverage advanced scheduling techniques to shape and describe each scenario in easy-to-use rules and configurations? In his session at @DevOpsSummit at 21st Cloud Expo, Oleg Chunikhin, CTO at Kublr, answered these questions and demonstrated techniques for implementing advanced scheduling. For example, using spot instances and co...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
The cloud era has reached the stage where it is no longer a question of whether a company should migrate, but when. Enterprises have embraced the outsourcing of where their various applications are stored and who manages them, saving significant investment along the way. Plus, the cloud has become a defining competitive edge. Companies that fail to successfully adapt risk failure. The media, of course, continues to extol the virtues of the cloud, including how easy it is to get there. Migrating...
The use of containers by developers -- and now increasingly IT operators -- has grown from infatuation to deep and abiding love. But as with any long-term affair, the honeymoon soon leads to needing to live well together ... and maybe even getting some relationship help along the way. And so it goes with container orchestration and automation solutions, which are rapidly emerging as the means to maintain the bliss between rapid container adoption and broad container use among multiple cloud host...
Imagine if you will, a retail floor so densely packed with sensors that they can pick up the movements of insects scurrying across a store aisle. Or a component of a piece of factory equipment so well-instrumented that its digital twin provides resolution down to the micrometer.
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life settle...
The need for greater agility and scalability necessitated the digital transformation in the form of following equation: monolithic to microservices to serverless architecture (FaaS). To keep up with the cut-throat competition, the organisations need to update their technology stack to make software development their differentiating factor. Thus microservices architecture emerged as a potential method to provide development teams with greater flexibility and other advantages, such as the abili...
Product connectivity goes hand and hand these days with increased use of personal data. New IoT devices are becoming more personalized than ever before. In his session at 22nd Cloud Expo | DXWorld Expo, Nicolas Fierro, CEO of MIMIR Blockchain Solutions, will discuss how in order to protect your data and privacy, IoT applications need to embrace Blockchain technology for a new level of product security never before seen - or needed.
As DevOps methodologies expand their reach across the enterprise, organizations face the daunting challenge of adapting related cloud strategies to ensure optimal alignment, from managing complexity to ensuring proper governance. How can culture, automation, legacy apps and even budget be reexamined to enable this ongoing shift within the modern software factory? In her Day 2 Keynote at @DevOpsSummit at 21st Cloud Expo, Aruna Ravichandran, VP, DevOps Solutions Marketing, CA Technologies, was jo...
Leading companies, from the Global Fortune 500 to the smallest companies, are adopting hybrid cloud as the path to business advantage. Hybrid cloud depends on cloud services and on-premises infrastructure working in unison. Successful implementations require new levels of data mobility, enabled by an automated and seamless flow across on-premises and cloud resources. In his general session at 21st Cloud Expo, Greg Tevis, an IBM Storage Software Technical Strategist and Customer Solution Architec...
Nordstrom is transforming the way that they do business and the cloud is the key to enabling speed and hyper personalized customer experiences. In his session at 21st Cloud Expo, Ken Schow, VP of Engineering at Nordstrom, discussed some of the key learnings and common pitfalls of large enterprises moving to the cloud. This includes strategies around choosing a cloud provider(s), architecture, and lessons learned. In addition, he covered some of the best practices for structured team migration an...
In his general session at 21st Cloud Expo, Greg Dumas, Calligo’s Vice President and G.M. of US operations, discussed the new Global Data Protection Regulation and how Calligo can help business stay compliant in digitally globalized world. Greg Dumas is Calligo's Vice President and G.M. of US operations. Calligo is an established service provider that provides an innovative platform for trusted cloud solutions. Calligo’s customers are typically most concerned about GDPR compliance, application p...
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
In his session at 21st Cloud Expo, Raju Shreewastava, founder of Big Data Trunk, provided a fun and simple way to introduce Machine Leaning to anyone and everyone. He solved a machine learning problem and demonstrated an easy way to be able to do machine learning without even coding. Raju Shreewastava is the founder of Big Data Trunk (www.BigDataTrunk.com), a Big Data Training and consulting firm with offices in the United States. He previously led the data warehouse/business intelligence and B...
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...