Click here to close now.

Welcome!

Virtualization Authors: Pat Romanski, Liz McMillan, Roger Strukhoff, Alena Prokharchyk, Lori MacVittie

Related Topics: Virtualization, Java, Microservices Journal, Web 2.0

Virtualization: Blog Post

Be the Victor in the Hunger Games of Your Virtualization Environment

Thoughts From the Mind of a Previous VMware Admin (aka Game Master)

Thoughts From the Mind of a Previous VMware Admin (aka Game Master)

Do you ever feel like your Windows server is not performing well in the VMware environment, as if it were a sponsor-less contestant in the arena of the annual hunger games?  As a VMware admin and consultant I witnessed first hand the fine art of deception for presenting restricted resources to virtual machines.  An application owner or Windows admin would come to my cube or put in a help desk ticket asking for a new virtual machine.  They would often ask me for an insane amount of resources for this VM because the application vendor demanded it.  So just like in the Hunger Games, I would plop the new VM into the environment but at the same time I would unleash harsh conditions on the VM without the requestor ever knowing.  In my defense, I was kind of forced to be one Mean Game Master!

Memory Restrictions are like Surviving in the Arena with Heavy Wounds

To limit : something that bounds, restrains, or confines.

Windows administrators use Task Manager or other tools to gauge performance in virtual machines, and while this is great for looking into each process for CPU and Memory usage percentages, the data is highly inaccurate.  For instance, you can look at the resources tab and see that your virtual machine has 4GB of RAM.  Feeling confident in this number meeting the application requirements, you then fire up the application.  At first things seem to be humming along as if your chariot has entered the arena with trailing flames of speed, but then intermittently the application speed goes downhill with no apparent reason.  Chances are that your VM Admin(aka the Game Master) has implemented a obstacle in the arena known as a Memory Limit.

  • Ask your VM Admin for a screenshot of the Resources tab of the Virtual Machine, specifically the Memory settings area.
  • If you see that a value has been given other than the amount of RAM you expect, you are a victim of a Memory Limit.
  • The only good values on this screen would be the exact allocated memory or having the checkbox set for “Unlimited.”

So what does this mean to you?  Memory Limits are designed to aid VMware Admins in restricting the amount of physical memory actually allocated to virtual machines.   For instance, you request a 4GB of RAM machine but the VMware admin implements a 2GB limitation.  Your virtual machine is actually using what is known as a balloon mechanism so as to mask the memory limit from the operating system.  So as you gaze at the resources tab, you would see 4GB of RAM available for use, however in the background, you are paging the remaining necessary memory to disk!  The only “sponsor care package” you can receive in this scenario would be in the form of having insanely fast storage underlying the virtual machine disk files.

  • Plead with the Game Master to remove the constraints!
  • Set the Memory Limit to Unlimited or the exact amount of Memory Allocated.

Now if you have survived this long, we need to investigate the VMware ESX Host memory utilization.  How over-subscribed is the host holding your VMs? If many virtual machines are fighting for memory, the ESX Host will implement what is known as Memory Swapping. There is no tool built into the operating system that you the OS admin can use to detect this is occurring against your VM’s fight for power. If Memory Swapping is in fact occurring you now have a major issue.  All VMs on the host are experiencing latency when utilizing memory because a big chunk of that memory is virtualized on the host disk drives or Storage Area Network.

  • Petition for your workload to be moved to a less contentious host!

Continue reading in part 2 of this series here where I discuss more havoc in the arena surrounding processor restrictions!

More Stories By Tommy Patterson

Tommy Patterson began his virtualization adventure during the launch of VMware's ESX Server's initial release. At a time when most admins were only adopting virtualization as a lab-only solution, he pushed through the performance hurdles to quickly bring production applications into virtualization. Since the early 2000s, Tommy has spent most of his career in a consulting role providing assessments, engineering, planning, and implementation assistance to many members of the Fortune 500. Troubleshooting complicated scenarios, and incorporating best practices into customer's production virtualization systems has been his passion for many years. Now he share his knowledge of virtualization and cloud computing as a Technology Evangelist in the Microsoft US Developer and Platform Evangelism team.

@ThingsExpo Stories
SYS-CON Events announced today that AIC, a leading provider of OEM/ODM server and storage solutions, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. AIC is a leading provider of both standard OTS, off-the-shelf, and OEM/ODM server and storage solutions. With expert in-house design capabilities, validation, manufacturing and production, AIC's broad selection of products are highly flexible and are configurable to any form factor or custom configuration. AIC leads the industry with nearly 20 years of ...
SYS-CON Events announced today that Vicom Computer Services, Inc., a provider of technology and service solutions, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. They are located at booth #427. Vicom Computer Services, Inc. is a progressive leader in the technology industry for over 30 years. Headquartered in the NY Metropolitan area. Vicom provides products and services based on today’s requirements around Unified Networks, Cloud Computing strategies, Virtualization around Software defined Data Ce...
How is unified communications transforming the way businesses operate? In his session at WebRTC Summit, Arvind Rangarajan, Director of Product Marketing at BroadSoft, will discuss how to extend unified communications experience outside the enterprise through WebRTC. He will also review use cases across different industry verticals. Arvind Rangarajan is Director, Product Marketing at BroadSoft. He has over 19 years of experience in the telecommunications industry in various roles such as Software Development, Product Management and Product Marketing, applied across Wireless, Unified Communic...
As we approach the next @ThingsExpo, to be held June 9-11 at the Javits Center in New York, my thoughts naturally turn to the Internet of Things. The IoT is a leviathan—in the best possible sense of the term—that will sweep up most everything in the ocean of data and technology being created today and tomorrow. But rather than try to grasp all of its possible uses, for today I'm looking at “just” the Industrial Internet part. I just read a long paper co-authored by Tim Berners-Lee about the possibility of describing a “web science,” that is, discipline that combines the study involved ...
The best mobile applications are augmented by dedicated servers, the Internet and Cloud services. Mobile developers should focus on one thing: writing the next socially disruptive viral app. Thanks to the cloud, they can focus on the overall solution, not the underlying plumbing. From iOS to Android and Windows, developers can leverage cloud services to create a common cross-platform backend to persist user settings, app data, broadcast notifications, run jobs, etc. This session provides a high level technical overview of many cloud services available to mobile app developers, includi...
Enterprise IoT is an exciting and chaotic space with a lot of potential to transform how the enterprise resources are managed. In his session at @ThingsExpo, Hari Srinivasan, Sr Product Manager at Cisco, will describe the challenges in enabling mass adoption of IoT, and share perspectives and insights on architectures/standards/protocols that are necessary to build a healthy ecosystem and lay the foundation to for a wide variety of exciting IoT use cases in the years to come.
The IoT Bootcamp is coming to Cloud Expo | @ThingsExpo on June 9-10 at the Javits Center in New York. Instructor. Registration is now available at http://iotbootcamp.sys-con.com/ Instructor Janakiram MSV previously taught the famously successful Multi-Cloud Bootcamp at Cloud Expo | @ThingsExpo in November in Santa Clara. Now he is expanding the focus to Janakiram is the founder and CTO of Get Cloud Ready Consulting, a niche Cloud Migration and Cloud Operations firm that recently got acquired by Aditi Technologies. He is a Microsoft Regional Director for Hyderabad, India, and one of the f...
SYS-CON Events announced today that B2Cloud, a provider of enterprise resource planning software, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. B2cloud develops the software you need. They have the ideal tools to help you work with your clients. B2Cloud’s main solutions include AGIS – ERP, CLOHC, AGIS – Invoice, and IZUM
SYS-CON Events announced today that MangoApps will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY., and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. MangoApps provides private all-in-one social intranets allowing workers to securely collaborate from anywhere in the world and from any device. Social, mobile, and easy to use. MangoApps has been named a "Market Leader" by Ovum Research and a "Cool Vendor" by Gartner...
SYS-CON Media announced today that @ThingsExpo Blog launched with 7,788 original stories. @ThingsExpo Blog offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. @ThingsExpo Blog can be bookmarked. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago.
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. Follow new article posts on Twitter at @MicroservicesE
SYS-CON Events announced today that robomq.io will exhibit at SYS-CON's @ThingsExpo, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. robomq.io is an interoperable and composable platform that connects any device to any application. It helps systems integrators and the solution providers build new and innovative products and service for industries requiring monitoring or intelligence from devices and sensors.
Wearable technology was dominant at this year’s International Consumer Electronics Show (CES) , and MWC was no exception to this trend. New versions of favorites, such as the Samsung Gear (three new products were released: the Gear 2, the Gear 2 Neo and the Gear Fit), shared the limelight with new wearables like Pebble Time Steel (the new premium version of the company’s previously released smartwatch) and the LG Watch Urbane. The most dramatic difference at MWC was an emphasis on presenting wearables as fashion accessories and moving away from the original clunky technology associated with t...
SYS-CON Events announced today that Litmus Automation will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Litmus Automation’s vision is to provide a solution for companies that are in a rush to embrace the disruptive Internet of Things technology and leverage it for real business challenges. Litmus Automation simplifies the complexity of connected devices applications with Loop, a secure and scalable cloud platform.
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, will provide some practical insights on what, how and why when implementing "software-defined" in the datacenter.
There is no doubt that Big Data is here and getting bigger every day. Building a Big Data infrastructure today is no easy task. There are an enormous number of choices for database engines and technologies. To make things even more challenging, requirements are getting more sophisticated, and the standard paradigm of supporting historical analytics queries is often just one facet of what is needed. As Big Data growth continues, organizations are demanding real-time access to data, allowing immediate and actionable interpretation of events as they happen. Another aspect concerns how to deliver ...
So I guess we’ve officially entered a new era of lean and mean. I say this with the announcement of Ubuntu Snappy Core, “designed for lightweight cloud container hosts running Docker and for smart devices,” according to Canonical. “Snappy Ubuntu Core is the smallest Ubuntu available, designed for security and efficiency in devices or on the cloud.” This first version of Snappy Ubuntu Core features secure app containment and Docker 1.6 (1.5 in main release), is available on public clouds, and for ARM and x86 devices on several IoT boards. It’s a Trend! This announcement comes just as...
WebRTC defines no default signaling protocol, causing fragmentation between WebRTC silos. SIP and XMPP provide possibilities, but come with considerable complexity and are not designed for use in a web environment. In his session at @ThingsExpo, Matthew Hodgson, technical co-founder of the Matrix.org, discussed how Matrix is a new non-profit Open Source Project that defines both a new HTTP-based standard for VoIP & IM signaling and provides reference implementations.
The security devil is always in the details of the attack: the ones you've endured, the ones you prepare yourself to fend off, and the ones that, you fear, will catch you completely unaware and defenseless. The Internet of Things (IoT) is nothing if not an endless proliferation of details. It's the vision of a world in which continuous Internet connectivity and addressability is embedded into a growing range of human artifacts, into the natural world, and even into our smartphones, appliances, and physical persons. In the IoT vision, every new "thing" - sensor, actuator, data source, data con...
SYS-CON Events announced today that CodeFutures, a leading supplier of database performance tools, has been named a “Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. CodeFutures is an independent software vendor focused on providing tools that deliver database performance tools that increase productivity during database development and increase database performance and scalability during production.