NASA achieves data goals for Mars rover with open source software | Opensource.com

NASA achieves data goals for Mars rover with open source software

Posted 22 Oct 2012 by 

Mark Bohannon (Red Hat)
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Since the landing of NASA’s rover, Curiosity, on Mars on August 6, 2012 (Universal Earth Time -- evening of August 5, Pacific Time), I have been following the incredible wealth of images that have been flowing back. I am awestruck by the breadth and beauty of the them.  

The technological challenge of Curiosity sending back enormous amounts of data has, in my opinion, not been fully appreciated. From NASA reports, we know that Curiosity was sending back 'low level resolution' data (1,200 x 1,200 pixels) until it went through a software "brain transplant" and is now providing even more detailed and modifiable data.  

How is this getting done so efficiently and distributed so effectively?

One recent story highlighted the 'anytime, anywhere' availability of Curiosity’s exploration that is handling "hundreds of gigabits/second of traffic for hundreds of thousands of concurrent viewers." Indeed, as the blog post from the cloud provider, Amazon Web Services (AWS), points out: "The final architecture, co-developed and reviewed across NASA/JPL and Amazon Web Services, provided NASA with assurance that the deployment model could cost-effectively scale, perform, and deliver an incredible experience of landing on another planet. With unrelenting goals to get the data out to the public, NASA/JPL prepared to service hundreds of gigabits/second of traffic for hundreds of thousands of concurrent viewers."

This is certainly evidence of the growing role that the cloud plays in real-time, reliable availability.

But, dig beneath the hood of this story—and the diagram included—and you’ll see another story. One that points to the key role of open source software in making this phenomenal mission work and the results available to so many, so quickly.

Here’s the diagram I am referring to:

Curiosity Diagram

 

If you look at the technology stack, you’ll see that at each level open source is key to achieving NASA’s mission goals. Let’s look at each one:

Nginx

Nginx (pronounced engine-x) is a free, open source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. As a project, it has been around for about ten years. According to their website, Nginx now hosts nearly 12.18% (22.2M) of active sites across all domains. Nginx is generally regarded as a preeminent webserver for delivering content fast due to "its high performance, stability, rich feature set, simple configuration, and low resource consumption." Unlike traditional servers, Nginx doesn't rely on threads to handle requests. Instead it uses a much more scalable, event-driven (asynchronous) architecture. This architecture uses small, but more importantly, predictable amounts of memory under load.

Among the known high-visiblity sites powered by Nginx, according to its website, are Netflix, Hulu, Pinterest, CloudFlare, Airbnb, WordPress.com, GitHub, SoundCloud, Zynga, Eventbrite, Zappos, Media Temple, Heroku, RightScale, Engine Yard and NetDNA

Railo-based CMS

Railo is an open source developer framework which implements the general-purpose CFML server-side scripting language pioneered by ColdFusion. If you're familiar with Zend (PHP), Django (Python), or Ruby on Rails, then Railo is their equivalent, except with CFML. It has recently been accepted as part of Jboss.org and runs on the Java Virtual Machine (JVM). It is often used to create dynamic websites, web applications and intranet systems. (A shout out to the community for pointing out that the diagram, which we relied on in writing this post, is a bit confusing when it uses the term 'Railo CMS'. That appears to be a shorthand, as NASA has utilized a CMS based on Railo to meet their content serving needs.)

GlusterFS

Perhaps the most important piece of this high-demand configuration, GlusterFS is an open source, distributed file system capable of scaling to several petabytes (actually, 72 brontobites!) and handling thousands of clients. GlusterFS clusters together storage building blocks over Infiniband RDMA or TCP/IP interconnect, aggregating disk and memory resources and managing data in a single global namespace. GlusterFS is based on a stackable user space design and can deliver exceptional performance for diverse workloads. It is especially adept at replicating big data across multiple platforms, allowing users to analyze the data via their own analytical tools. This technology is used to power the personalized radio service Pandora and the cloud content services company Brightcove, and by NTTPC for its cloud storage business. (In 2011, Red Hat acquired the open source software company, Gluster, which supports the GlusterFS upstream community; the product is now known as Red Hat Storage Server.)

I suspect that, like myself, the cascade of visual images from this unique exploration has sparked for yet another generation the mystery and immense challenge of life beyond our own planet. And what a change from the grainy television transmissions of the first moon landing, 43 years ago this summer (at least for those who are in a position to remember it!). Even 20 years ago, the delays, the inferior quality, and the narrow bandwidth of the data that could be analyzed stands in stark contrast to what is being delivered right now and for the next few years from this one mission.

Taken together, the combination of cloud and open source enabled the Curiosity mission to provide these results in real time, not months delayed; at high quality, not "good enough" quality. A traditional, proprietary approach would not have been this successful, given the short time to deployment and shifting requirements that necessitated the ultimate in agility and flexibility. NASA/JPL are to be commended. And while there was one cloud offering involved, "it really could have been rolled with any number of other solutions," as the story cited at the beginning of this post notes.

As policy makers and technology strategists continue their focus on 'big data', the mission of Curiosity will provide some important lessons. One key take away: open source has been key to the success of this mission and making its results as widely available as possible in so quickly a time frame.

Many thanks to John Mark Walker, Red Hat's Gluster Community Guy, for his help and insight in preparing this post.

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10 Comments

JayB

Just a note. Railo is -not- a cms system. It's an application server built as an open source replacement for Adobe's Coldfusion application server. You can build a nice cms system with it, but you can build almost anything with it using CFML.

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David Stockton

It's worth noting that Railo isn't a CMS. It's a general purpose implementation of a CFML server side scripting engine. There are several CMS applications written in CFML (ColdFusion markup language) that would run on the Railo engine.

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David Stockton

Sorry - just saw JayB had already posted this!

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skipzero

Actually, Curiosity landed Aug 6th, 2012...
http://en.wikipedia.org/wiki/Mars_Science_Laboratory

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markbohannon
Open Source Champion

Thanks for the heads up! Clarified Railo ... and fixed the date.

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juillardr
Newbie

"And what a change from the grainy television transmissions of the first moon landing, 43 years ago this summer"

The pictures I believe were beamed from the moon in high definition and recorded on tape. Since public TV could not broadcast the images directly, NASA used a normal TV camera pointed at one of their high res displays to produce the image that was broadcast to the public. Sadly the original high res tapes have been lost.

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Unidentified

why no mention of the MySQL?

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markbohannon
Open Source Champion

Thanks for your eagle eye ! Yes, MySQL appears to be definitely included in the graphic. What is not clear is whether it is internal to the implementation of external. Nonetheless, good point and thanks for raising it.

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David Somers

Adrian Gardner, CIO of Goddard Space Flight Center, was recently featured in the Forum on World Class IT podcast series and talked about, among other topics, the importance of open source to foster innovation. Podcast can be accessed at http://www.metisstrategy.com/interview/adrian-gardner/. Thought this may be relevant and of interest to folks following this thread.

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hilfan

Wow it using mySql too, very nice, unfortunetly there is no discussion about it.

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Mark Bohannon | Mark Bohannon is Vice President of Global Public Policy and Government Affairs at Red Hat. Previously, he served as Senior Vice President, Public Policy and General Counsel at the Software & Information Industry Association (SIIA), the principal U.S. trade association for the software and digital content industry. Prior to his work at SIIA, he was a senior official at the U.S. Department of Commerce.

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