Welcome!

@CloudExpo Authors: Liz McMillan, Elizabeth White, Yeshim Deniz, PagerDuty Blog, Pat Romanski

Related Topics: @CloudExpo

@CloudExpo: Blog Post

What is Elastic Computing?

For me, the economic-centric definition is the best way to apply elasticity to cloud computing

Recently there has been a lot of talk about private clouds, public clouds and inter clouds and the problem in attempting to define their key attributes. The problem facing all the various cloud terms is the apparent lack of quantifiable characteristics. In contrast most other areas of technology include standard characteristics such as units of measurement that allows us to define specific quantifiable aspects.

These aspects allow for the creation of complex models and formulas that enable a continued improvement and enhancement to the underlying platforms. I thought I'd briefly take a closer look at core concepts of elasticity and how it can be applied to cloud computing.

For a lot of companies looking at entering the cloud computing marketplace the lack of quantifiable capacity metrics has become a particular problem point. Currently trying to plan future resource & capacity requirements is an extremely difficult endeavor. Recent high profile cloud outages have made the need for quantifiable proactive capacity measurement painfully clear. When it comes to scaling infrastructure it seems that a lot of cloud computing has come down to a best guess mentality. (Although companies like SOASTA have done a great job at attempting to solve this problem) At the end of the day these outages are generally because of the unforeseen aspects, namely the inability to adequately determine and measure an application or infrastructure's breaking point. For this reason I believe that going forward the concept of elasticity will quickly become one of the most important aspects when designing most modern cloud centric system architectures.

To give you some background, I've been pitch my vision for elastic computing for almost 6 years. (I'm told others have also used the term before me as well) Generally my theory for Elastic Computing is in the ability to apply a quantifiable methodology that allows for the basis of an adaptive introspection with in a real time hybrid cloud centric infrastructure. But this doesn't actually address the question of "What is Elastic Computing" for that we need to dig deeper.

First we must look at what "elasticity" is and how it can be applied. According wikipedia, "in physics, elasticity is the physical property of a material when it deforms under stress (e.g. external forces), but returns to its original shape when the stress is removed. The relative amount of deformation is called the strain." Similarly elasticity applied to computing can be thought as the amount of strain an application or infrastructure can withstand while either expanding or contracting to meet the demands place on it.

One of the best examples of elasticity can be found in economics where elasticity is described as "the ratio of the percent change in one variable to the percent change in another variable. It is a tool for measuring the responsiveness of a function to changes in parameters in a relative way. A typical example is analysis of the elasticity of substitution, price and wealth. Popular in economics, elasticity is an approach used among empiricists because it is independent of units and thus simplifies data analysis."

For me, the economic-centric definition is the best way to apply elasticity to cloud computing. In this approach the main benefit is the ability to measure quantifiable capacity metrics using standard mathematical formulas such as "arc elasticity" -- a formula where the elasticity of one variable is measured with respect to another between two given points. The arc elasticity method of introspection is used when there is no general function for the relationship of two variables. (Think of an unknown or sudden increase in demand placed on an application or infrastructure) Therefore this formula provides the ability of to act as a predictive estimator for required system elasticity.

Wikipedia provides this economic example.

The y arc elasticity of x is defined as:
E_{x,y} = \frac{\% \mbox{ change in } x}{\% \mbox{ change in } y}

where the percentage change is calculated relative to the midpoint

\% \mbox{ change in } x = \frac{x_2 - x_1}{(x_2 + x_1)/2}
\% \mbox{ change in } y = \frac{y_2 - y_1}{(y_2 + y_1)/2}

What is Elastic Computing?
The quantifiable ability to manage, measure, predict and adapt responsiveness of an application based on real time demands placed on an infrastructure using a combination of local and remote computing resources.

More Stories By Reuven Cohen

An instigator, part time provocateur, bootstrapper, amateur cloud lexicographer, and purveyor of random thoughts, 140 characters at a time.

Reuven is an early innovator in the cloud computing space as the founder of Enomaly in 2004 (Acquired by Virtustream in February 2012). Enomaly was among the first to develop a self service infrastructure as a service (IaaS) platform (ECP) circa 2005. As well as SpotCloud (2011) the first commodity style cloud computing Spot Market.

Reuven is also the co-creator of CloudCamp (100+ Cities around the Globe) CloudCamp is an unconference where early adopters of Cloud Computing technologies exchange ideas and is the largest of the ‘barcamp’ style of events.

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
The essence of cloud computing is that all consumable IT resources are delivered as services. In his session at 15th Cloud Expo, Yung Chou, Technology Evangelist at Microsoft, demonstrated the concepts and implementations of two important cloud computing deliveries: Infrastructure as a Service (IaaS) and Platform as a Service (PaaS). He discussed from business and technical viewpoints what exactly they are, why we care, how they are different and in what ways, and the strategies for IT to transi...
The Internet of Things is clearly many things: data collection and analytics, wearables, Smart Grids and Smart Cities, the Industrial Internet, and more. Cool platforms like Arduino, Raspberry Pi, Intel's Galileo and Edison, and a diverse world of sensors are making the IoT a great toy box for developers in all these areas. In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists discussed what things are the most important, which will have the most profound e...
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor - all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
My team embarked on building a data lake for our sales and marketing data to better understand customer journeys. This required building a hybrid data pipeline to connect our cloud CRM with the new Hadoop Data Lake. One challenge is that IT was not in a position to provide support until we proved value and marketing did not have the experience, so we embarked on the journey ourselves within the product marketing team for our line of business within Progress. In his session at @BigDataExpo, Sum...
Niagara Networks exhibited at the 19th International Cloud Expo, which took place at the Santa Clara Convention Center in Santa Clara, CA, in November 2016. Niagara Networks offers the highest port-density systems, and the most complete Next-Generation Network Visibility systems including Network Packet Brokers, Bypass Switches, and Network TAPs.
Extreme Computing is the ability to leverage highly performant infrastructure and software to accelerate Big Data, machine learning, HPC, and Enterprise applications. High IOPS Storage, low-latency networks, in-memory databases, GPUs and other parallel accelerators are being used to achieve faster results and help businesses make better decisions. In his session at 18th Cloud Expo, Michael O'Neill, Strategic Business Development at NVIDIA, focused on some of the unique ways extreme computing is...
"We host and fully manage cloud data services, whether we store, the data, move the data, or run analytics on the data," stated Kamal Shannak, Senior Development Manager, Cloud Data Services, IBM, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm.
Interoute has announced the integration of its Global Cloud Infrastructure platform with Rancher Labs’ container management platform, Rancher. This approach enables enterprises to accelerate their digital transformation and infrastructure investments. Matthew Finnie, Interoute CTO commented “Enterprises developing and building apps in the cloud and those on a path to Digital Transformation need Digital ICT Infrastructure that allows them to build, test and deploy faster than ever before. The int...
In his General Session at 17th Cloud Expo, Bruce Swann, Senior Product Marketing Manager for Adobe Campaign, explored the key ingredients of cross-channel marketing in a digital world. Learn how the Adobe Marketing Cloud can help marketers embrace opportunities for personalized, relevant and real-time customer engagement across offline (direct mail, point of sale, call center) and digital (email, website, SMS, mobile apps, social networks, connected objects).
For organizations that have amassed large sums of software complexity, taking a microservices approach is the first step toward DevOps and continuous improvement / development. Integrating system-level analysis with microservices makes it easier to change and add functionality to applications at any time without the increase of risk. Before you start big transformation projects or a cloud migration, make sure these changes won’t take down your entire organization.
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
SYS-CON Events announced today that Ocean9will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Ocean9 provides cloud services for Backup, Disaster Recovery (DRaaS) and instant Innovation, and redefines enterprise infrastructure with its cloud native subscription offerings for mission critical SAP workloads.
Your homes and cars can be automated and self-serviced. Why can't your storage? From simply asking questions to analyze and troubleshoot your infrastructure, to provisioning storage with snapshots, recovery and replication, your wildest sci-fi dream has come true. In his session at @DevOpsSummit at 20th Cloud Expo, Dan Florea, Director of Product Management at Tintri, will provide a ChatOps demo where you can talk to your storage and manage it from anywhere, through Slack and similar services ...
Imagine having the ability to leverage all of your current technology and to be able to compose it into one resource pool. Now imagine, as your business grows, not having to deploy a complete new appliance to scale your infrastructure. Also imagine a true multi-cloud capability that allows live migration without any modification between cloud environments regardless of whether that cloud is your private cloud or your public AWS, Azure or Google instance. Now think of a world that is not locked i...
SYS-CON Events announced today that Auditwerx will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Auditwerx specializes in SOC 1, SOC 2, and SOC 3 attestation services throughout the U.S. and Canada. As a division of Carr, Riggs & Ingram (CRI), one of the top 20 largest CPA firms nationally, you can expect the resources, skills, and experience of a much larger firm combined with the accessibility and atten...
MongoDB Atlas leverages VPC peering for AWS, a service that allows multiple VPC networks to interact. This includes VPCs that belong to other AWS account holders. By performing cross account VPC peering, users ensure networks that host and communicate their data are secure. In his session at 20th Cloud Expo, Jay Gordon, a Developer Advocate at MongoDB, will explain how to properly architect your VPC using existing AWS tools and then peer with your MongoDB Atlas cluster. He'll discuss the secur...
SYS-CON Events announced today that Linux Academy, the foremost online Linux and cloud training platform and community, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Linux Academy was founded on the belief that providing high-quality, in-depth training should be available at an affordable price. Industry leaders in quality training, provided services, and student certification passes, its goal is to c...
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm. In his Day 3 Keynote at 20th Cloud Expo, Chris Brown, a Solutions Marketing Manager at Nutanix, will explore t...
In his session at Cloud Expo, Alan Winters, an entertainment executive/TV producer turned serial entrepreneur, will present a success story of an entrepreneur who has both suffered through and benefited from offshore development across multiple businesses: The smart choice, or how to select the right offshore development partner Warning signs, or how to minimize chances of making the wrong choice Collaboration, or how to establish the most effective work processes Budget control, or how to m...