[Beowulf] $1, 279-per-hour, 30, 000-core cluster built on Amazon EC2 cloud
deadline at eadline.org
Mon Oct 3 14:17:33 EDT 2011
I think everyone has a similar thoughts, but the presentation
provides some real data and experiences.
BTW, for those interested, I have new poll on ClusterMonkey asking
about clouds and HPC. (http://www.clustermonkey.net/)
The last poll was on GP-GPU use.
> Thanks for posting that video. It confirmed what I always suspected
> about clouds for HPC.
> On 10/03/2011 08:25 AM, Douglas Eadline wrote:
>> Interesting and pragmatic HPC cloud presentation, worth watching
>> (25 minutes)
>>> $1,279-per-hour, 30,000-core cluster built on Amazon EC2 cloud
>>> By Jon Brodkin | Published September 20, 2011 10:49 AM
>>> Amazon EC2 and other cloud services are expanding the market for
>>> high-performance computing. Without access to a national lab or a
>>> supercomputer in your own data center, cloud computing lets businesses
>>> up temporary clusters at will and stop paying for them as soon as the
>>> computing needs are met.
>>> A vendor called Cycle Computing is on a mission to demonstrate the
>>> of Amazonâs cloud by building increasingly large clusters on the
>>> Compute Cloud. Even with Amazon, building a cluster takes some work,
>>> Cycle combines several technologies to ease the process and recently
>>> them to create a 30,000-core cluster running CentOS Linux.
>>> The cluster, announced publicly this week, was created for an unnamed
>>> âTop 5
>>> Pharmaâ customer, and ran for about seven hours at the end of July at
>>> cost of $1,279 per hour, including the fees to Amazon and Cycle
>>> The details are impressive: 3,809 compute instances, each with eight
>>> and 7GB of RAM, for a total of 30,472 cores, 26.7TB of RAM and 2PB
>>> (petabytes) of disk space. Security was ensured with HTTPS, SSH and
>>> AES encryption, and the cluster ran across data centers in three Amazon
>>> regions in the United States and Europe. The cluster was dubbed
>>> Spreading the cluster across multiple continents was done partly for
>>> recovery purposes, and also to guarantee that 30,000 cores could be
>>> provisioned. âWe thought it would improve our probability of success
>>> spread it out,â Cycle Computingâs Dave Powers, manager of product
>>> engineering, told Ars. âNobody really knows how many instances you
>>> get at
>>> any one time from any one [Amazon] region.â
>>> Amazon offers its own special cluster compute instances, at a higher
>>> than regular-sized virtual machines. These cluster instances provide 10
>>> Gigabit Ethernet networking along with greater CPU and memory, but they
>>> werenât necessary to build the Cycle Computing cluster.
>>> The pharmaceutical companyâs job, related to molecular modeling, was
>>> âembarrassingly parallelâ so a fast interconnect wasnât crucial.
>>> reduce costs, Cycle took advantage of Amazonâs low-price âspot
>>> instances.â To
>>> manage the cluster, Cycle Computing used its own management software as
>>> as the Condor High-Throughput Computing software and Chef, an open
>>> systems integration framework.
>>> Cycle demonstrated the power of the Amazon cloud earlier this year with
>>> 10,000-core cluster built for a smaller pharma firm called Genentech.
>>> 10,000 cores is a relatively easy task, says Powers. âWe think
>>> the small-scale environments,â he said. 30,000 cores isnât the end
>>> either. Going forward, Cycle plans bigger, more complicated clusters,
>>> ones that will require Amazonâs special cluster compute instances.
>>> The 30,000-core cluster may or may not be the biggest one run on EC2.
>>> isnât saying.
>>> âI canât share specific customer details, but can tell you that we
>>> businesses of all sizes running large-scale, high-performance computing
>>> workloads on AWS [Amazon Web Services], including distributed clusters
>>> the Cycle Computing 30,000 core cluster to tightly-coupled clusters
>>> used for science and engineering applications such as computational
>>> dynamics and molecular dynamics simulation,â an Amazon spokesperson
>>> Amazon itself actually built a supercomputer on its own cloud that made
>>> onto the list of the worldâs Top 500 supercomputers. With 7,000
>>> Amazon cluster ranked number 232 in the world last November with speeds
>>> 41.82 teraflops, falling to number 451 in June of this year. So far,
>>> Computing hasnât run the Linpack benchmark to determine the speed of
>>> clusters relative to Top 500 sites.
>>> But Cycleâs work is impressive no matter how you measure it. The job
>>> performed for the unnamed pharma company âwould take well over a week
>>> them to run internally,â Powers says. In the end, the cluster
>>> equivalent of 10.9 âcompute years of work.â
>>> The task of managing such large cloud-based clusters forced Cycle to
>>> its own game, with a new plug-in for Chef the company calls Grill.
>>> âThere is no way that any mere human could keep track of all of the
>>> parts on a cluster of this scale,â Cycle wrote in a blog post. âAt
>>> weâve always been fans of extreme IT automation, but we needed to
>>> to the next level in order to monitor and manage every instance,
>>> daemon, job, and so on in order for Nekomata to be an efficient 30,000
>>> tool instead of a big shiny on-demand paperweight.â
>>> But problems did arise during the 30,000-core run.
>>> âYou can be sure that when you run at massive scale, you are bound to
>>> into some unexpected gotchas,â Cycle notes. âIn our case, one of
>>> included such things as running out of file descriptors on the license
>>> server. In hindsight, we should have anticipated this would be an
>>> we didnât find that in our prelaunch testing, because we didnât
>>> at full
>>> scale. We were able to quickly recover from this bump and keep moving
>>> with the workload with minimal impact. The license server was able to
>>> very nicely with this workload once we increased the number of file
>>> Cycle also hit a speed bump related to volume and byte limits on
>>> Elastic Block Store volumes. But the company is already planning bigger
>>> better things.
>>> âWe already have our next use-case identified and will be turning up
>>> scale a bit more with the next run,â the company says. But
>>> not about core counts or terabytes of RAM or petabytes of data. Rather,
>>> about how we are helping to transform how science is done.â
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