|By Tommy Patterson||
|November 9, 2012 01:00 PM EST||
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!
Modern DevOps Tool Kit By @Logentries and @NewRelic | @DevOpsSummit #DevOps #Containers #Microservices
Auto-scaling environments, micro-service architectures and globally-distributed teams are just three common examples of why organizations today need automation and interoperability more than ever. But is interoperability something we simply start doing, or does it require a reexamination of our processes? And can we really improve our processes without first making interoperability a requirement for how we choose our tools?
Jul. 29, 2015 07:15 PM EDT Reads: 307
Where the Network Got Invited to the Party By @LMacVittie | @DevOpsSummit #DevOps #Docker #Containers #Microservices
At DevOps Summit NY there’s been a whole lot of talk about not just DevOps, but containers, IoT, and microservices. Sessions focused not just on the cultural shift needed to grow at scale with a DevOps approach, but also made sure to include the network ”plumbing” needed to ensure success as applications decompose into the microservice architectures enabling rapid growth and support for the Internet of (Every)Things.
Jul. 29, 2015 06:15 PM EDT Reads: 1,733
How do you securely enable access to your applications in AWS without exposing any attack surfaces? The answer is usually very complicated because application environments morph over time in response to growing requirements from your employee base, your partners and your customers. In his session at @DevOpsSummit, Haseeb Budhani, CEO and Co-founder of Soha, shared five common approaches that DevOps teams follow to secure access to applications deployed in AWS, Azure, etc., and the friction an...
Jul. 29, 2015 04:30 PM EDT Reads: 497
Take the Long View with Digital Transformation By @IoT2040 | @ThingsExpo #IoT #M2M #API #Microservices #InternetOfThings
Digital Transformation is the ultimate goal of cloud computing and related initiatives. The phrase is certainly not a precise one, and as subject to hand-waving and distortion as any high-falutin' terminology in the world of information technology. Yet it is an excellent choice of words to describe what enterprise IT—and by extension, organizations in general—should be working to achieve. Digital Transformation means: handling all the data types being found and created in the organizat...
Jul. 29, 2015 04:00 PM EDT Reads: 1,066
This week, I joined SOASTA as Senior Vice President of Performance Analytics. Given my background in cloud computing and distributed systems operations — you may have read my blogs on CNET or GigaOm — this may surprise you, but I want to explain why this is the perfect time to take on this opportunity with this team. In fact, that’s probably the best way to break this down. To explain why I’d leave the world of infrastructure and code for the world of data and analytics, let’s explore the timing...
Jul. 29, 2015 03:45 PM EDT Reads: 344
The Software Defined Data Center (SDDC), which enables organizations to seamlessly run in a hybrid cloud model (public + private cloud), is here to stay. IDC estimates that the software-defined networking market will be valued at $3.7 billion by 2016. Security is a key component and benefit of the SDDC, and offers an opportunity to build security 'from the ground up' and weave it into the environment from day one. In his session at 16th Cloud Expo, Reuven Harrison, CTO and Co-Founder of Tufin,...
Jul. 29, 2015 03:00 PM EDT Reads: 467
You often hear the two titles of "DevOps" and "Immutable Infrastructure" used independently. In his session at DevOps Summit, John Willis, Technical Evangelist for Docker, covered the union between the two topics and why this is important. He provided an overview of Immutable Infrastructure then showed how an Immutable Continuous Delivery pipeline can be applied as a best practice for "DevOps." He ended the session with some interesting case study examples.
Jul. 29, 2015 02:15 PM EDT Reads: 144
Jul. 29, 2015 02:00 PM EDT Reads: 282
Discussions about cloud computing are evolving into discussions about enterprise IT in general. As enterprises increasingly migrate toward their own unique clouds, new issues such as the use of containers and microservices emerge to keep things interesting. In this Power Panel at 16th Cloud Expo, moderated by Conference Chair Roger Strukhoff, panelists addressed the state of cloud computing today, and what enterprise IT professionals need to know about how the latest topics and trends affect t...
Jul. 29, 2015 02:00 PM EDT Reads: 1,169
SYS-CON Events announced today that HPM Networks will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
Jul. 29, 2015 01:45 PM EDT Reads: 422
[session] The Container New World By @KeGilpin | @DevOpsSummit #DevOps #Docker #Containers #Microservices
Containers are changing the security landscape for software development and deployment. As with any security solutions, security approaches that work for developers, operations personnel and security professionals is a requirement. In his session at DevOps Summit, Kevin Gilpin, CTO and Co-Founder of Conjur, will discuss various security considerations for container-based infrastructure and related DevOps workflows.
Jul. 29, 2015 01:00 PM EDT Reads: 1,059
Microservices Total Cost of Ownership: Too Soon? By @Aruna13 | @DevOpsSummit #DevOps #Docker #Containers #Microservices
Microservices are hot. And for good reason. To compete in today’s fast-moving application economy, it makes sense to break large, monolithic applications down into discrete functional units. Such an approach makes it easier to update and add functionalities (text-messaging a customer, calculating sales tax for a specific geography, etc.) and get those updates / adds into production fast. In fact, some would argue that microservices are a prerequisite for true continuous delivery. But is it too...
Jul. 29, 2015 01:00 PM EDT Reads: 670
Summer is finally here and it’s time for a DevOps summer vacation. From San Francisco to New York City, our top summer conferences list is going to continuously deliver you to the summer destinations of your dreams. These DevOps parties are hitting all the hottest summer trends with Microservices, Agile, Continuous Delivery, DevSecOps, and even Continuous Testing. Move over Kanye. These are the top 5 Summer DevOps Conferences of 2015.
Jul. 29, 2015 01:00 PM EDT Reads: 662
[video] Infrastructure as a Toolbox By @SoftLayer at @CloudExpo New York | #IoT #API #Containers #Microservices
Countless business models have spawned from the IaaS industry. Resell Web hosting, blogs, public cloud, and on and on. With the overwhelming amount of tools available to us, it's sometimes easy to overlook that many of them are just new skins of resources we've had for a long time. In his General Session at 16th Cloud Expo, Phil Jackson, Lead Technology Evangelist at SoftLayer, broke down what we've got to work with and discuss the benefits and pitfalls to discover how we can best use them to d...
Jul. 29, 2015 01:00 PM EDT Reads: 1,946
Puppet Labs has published their annual State of DevOps report and it is loaded with interesting information as always. Last year’s report brought home the point that DevOps was becoming widely accepted in the enterprise. This year’s report further validates that point and provides us with some interesting insights from surveying a wide variety of companies in different phases of their DevOps journey.
Jul. 29, 2015 01:00 PM EDT Reads: 171
What we really mean to ask is whether microservices architecture is SOA done right. But then, of course, we’d have to figure out what microservices architecture was. And if you think defining SOA is difficult, pinning down microservices architecture is unquestionably frying pan into fire time. Given my years at ZapThink, fighting to help architects understand what Service-Oriented Architecture really was and how to get it right, it’s no surprise that many people ask me this question.
Jul. 29, 2015 10:30 AM EDT Reads: 377
One of the ways to increase scalability of services – and applications – is to go “stateless.” The reasons for this are many, but in general by eliminating the mapping between a single client and a single app or service instance you eliminate the need for resources to manage state in the app (overhead) and improve the distributability (I can make up words if I want) of requests across a pool of instances. The latter occurs because sessions don’t need to hang out and consume resources that could ...
Jul. 29, 2015 10:15 AM EDT Reads: 157
[video] An Interview with @ProfitBricksUSA CEO @AchimWeiss | @CloudExpo #DevOps #Docker #Containers #Microservices
"ProfitBricks was founded in 2010 and we are the painless cloud - and we are also the Infrastructure as a Service 2.0 company," noted Achim Weiss, Chief Executive Officer and Co-Founder of ProfitBricks, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
Jul. 29, 2015 10:15 AM EDT Reads: 1,109
Approved this February by the Internet Engineering Task Force (IETF), HTTP/2 is the first major update to HTTP since 1999, when HTTP/1.1 was standardized. Designed with performance in mind, one of the biggest goals of HTTP/2 implementation is to decrease latency while maintaining a high-level compatibility with HTTP/1.1. Though not all testing activities will be impacted by the new protocol, it's important for testers to be aware of any changes moving forward.
Jul. 29, 2015 08:00 AM EDT Reads: 148
The Internet of Things. Cloud. Big Data. Real-Time Analytics. To those who do not quite understand what these phrases mean (and let’s be honest, that’s likely to be a large portion of the world), words like “IoT” and “Big Data” are just buzzwords. The truth is, the Internet of Things encompasses much more than jargon and predictions of connected devices. According to Parker Trewin, Senior Director of Content and Communications of Aria Systems, “IoT is big news because it ups the ante: Reach out ...
Jul. 29, 2015 05:00 AM EDT Reads: 383