Welcome!

Linux Containers Authors: Liz McMillan, Jason Bloomberg, Zakia Bouachraoui, Yeshim Deniz, Elizabeth White

Related Topics: @DevOpsSummit, Java IoT, Linux Containers, Containers Expo Blog, @CloudExpo

@DevOpsSummit: Blog Post

Yet Another Cloud OS? By @TrevParsons | @DevOpsSummit [#DevOps]

Before YARN there was another resource negotiator, Mesos

Mesos, Yet Another Cloud OS?

YARN stands for Yet Another Resource Negotiator. According to Hortonworks, it is "the architectural center of Hadoop". YARN is the stack layer that allows multiple processing engines, with varying workloads (streaming, SQL, batch, machine learning etc.) to run on top of the Hadoop file system, HDFS.

Before YARN there was another resource negotiator, Mesos

(Hence the "yet another" in YARN)

Mesos was originally documented in a research paper, followed by an Apache project, and now commercialized as Mesosphere - who are building out an ecosystem around Mesos.

Is Mesos yet another cloud OS?

In fairness to Mesosphere, their marketing doesn't stray into the hyperbole of calling Mesos a Cloud OS (maybe a data center OS or a distributed systems OS). This makes sense because it would probably confuse people. However, they do talk about running your infrastructure "like one big computer" and running distributed applications "as if they were apps being launched on a laptop." It seems clear this is a hugely ambitious endeavor by a company who have the vision to match.

In the past I've compared the hype around Docker Inc. to the fuss in 2012 around the billion-dollar acquisition of Nicira by VMware.

Now it seems clear that Mesosphere is a better candidate to wear the Nicira Most Disruptive Startup crown.

If Mesos is for resource scheduling across a cluster - how does this lead to the OS analogy?

The answer starts with the description on the Apache Mesos site, where Mesos is described as a distributed systems kernel, drawing parallels to the Linux kernel (in the same way that the Linux kernel gets confused with GNU/Linux OS). Running on this kernel is a set of frameworks (daemons or services in the OS-world) that allow people to build applications. These include Marathon (distributed init), Chronos (distributed cron), and Hadoop (distributed file system).

The kernel analogy makes more sense when you view Mesos as abstracting "CPU, memory, storage and other compute resources away from machines (physical or virtual)."

Mesor Architecture

The architecture is shown above, so I won't repeat the description of how this works in terms of masters, slaves, schedulers etc. The diagram is lifted from the Apache project site with has a pretty clear description (which you can see here).

The concept of resource offers is the key to the architecture's efficiency.

By allowing the frameworks to decide which resources to consume - subject to a plugin module in the master that defines the policy for applying (fair-sharing, Dominant Resource Fairness as per the DRF paper etc.) - multiple frameworks can compete for cluster resources.

Looking forward

In my next blog post I will focus on how to write a framework, including the role of the scheduler, executor, and how they are both implemented.

There is a ton we can cover in this area. In future posts I'll dive into Google's Kubernetes (with it's promise of "elastic distributed microservices") and why the Mesosphere team were so quick to ensure it was seen as being part of the Mesos ecosystem rather than a competing framework (embrace and extend maybe?).

I'd also like to why Mesosphere is working so closely with a customer like HubSpot but don't seem to have embraced Singularity (at least not yet). Along the way we'll move from the 20,000 ft view and get stuck in the weeds: we'll explore isolation with LXC vs lmctfy, how to go about securing access to your cluster, how to write Mesos frameworks, and of course we need to look into how you make Singularity's log watcher play well with Logentries!

More Stories By Trevor Parsons

Trevor Parsons is Chief Scientist and Co-founder of Logentries. Trevor has over 10 years experience in enterprise software and, in particular, has specialized in developing enterprise monitoring and performance tools for distributed systems. He is also a research fellow at the Performance Engineering Lab Research Group and was formerly a Scientist at the IBM Center for Advanced Studies. Trevor holds a PhD from University College Dublin, Ireland.

IoT & Smart Cities Stories
The challenges of aggregating data from consumer-oriented devices, such as wearable technologies and smart thermostats, are fairly well-understood. However, there are a new set of challenges for IoT devices that generate megabytes or gigabytes of data per second. Certainly, the infrastructure will have to change, as those volumes of data will likely overwhelm the available bandwidth for aggregating the data into a central repository. Ochandarena discusses a whole new way to think about your next...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
All in Mobile is a place where we continually maximize their impact by fostering understanding, empathy, insights, creativity and joy. They believe that a truly useful and desirable mobile app doesn't need the brightest idea or the most advanced technology. A great product begins with understanding people. It's easy to think that customers will love your app, but can you justify it? They make sure your final app is something that users truly want and need. The only way to do this is by ...
Digital Transformation and Disruption, Amazon Style - What You Can Learn. Chris Kocher is a co-founder of Grey Heron, a management and strategic marketing consulting firm. He has 25+ years in both strategic and hands-on operating experience helping executives and investors build revenues and shareholder value. He has consulted with over 130 companies on innovating with new business models, product strategies and monetization. Chris has held management positions at HP and Symantec in addition to ...
DXWorldEXPO LLC announced today that Big Data Federation to Exhibit at the 22nd International CloudEXPO, colocated with DevOpsSUMMIT and DXWorldEXPO, November 12-13, 2018 in New York City. Big Data Federation, Inc. develops and applies artificial intelligence to predict financial and economic events that matter. The company uncovers patterns and precise drivers of performance and outcomes with the aid of machine-learning algorithms, big data, and fundamental analysis. Their products are deployed...
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more busine...
Cell networks have the advantage of long-range communications, reaching an estimated 90% of the world. But cell networks such as 2G, 3G and LTE consume lots of power and were designed for connecting people. They are not optimized for low- or battery-powered devices or for IoT applications with infrequently transmitted data. Cell IoT modules that support narrow-band IoT and 4G cell networks will enable cell connectivity, device management, and app enablement for low-power wide-area network IoT. B...
The hierarchical architecture that distributes "compute" within the network specially at the edge can enable new services by harnessing emerging technologies. But Edge-Compute comes at increased cost that needs to be managed and potentially augmented by creative architecture solutions as there will always a catching-up with the capacity demands. Processing power in smartphones has enhanced YoY and there is increasingly spare compute capacity that can be potentially pooled. Uber has successfully ...
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things'). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing. IoT is not about the devices, its about the data consumed and generated. The devices are tools, mechanisms, conduits. This paper discusses the considerations when dealing with the...