Migrate contents from openhtc.org to opensciencegrid.github.io

.gitignore

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+_site/
+.sass-cache/
+.jekyll-metadata

LICENSE

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README.md

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+## Welcome to the Open Science Grid Documentation Pages
+
+This page is meant as a test or demo of various web technologies that could be used for OSG documentation.
+It's not meant for end-users, unless they are horribly bored or curious.
+
+The real webpage for the OSG is <https://www.opensciencegrid.org>.
+
+### What We Do
+
+The OSG facilitates access to distributed high throughput computing for research in the US.
+The resources accessible through the OSG are contributed by the community, organized by the OSG, and governed by the OSG consortium.
+In the last 12 months, we have provided more than 1.2 billion CPU hours to researchers across a wide variety of projects.
+
+To see the breadth of the OSG use, [explore our accounting portal](https://gracc.opensciencegrid.org).
+
+### Submit Locally, Run Globally
+
+Researchers can submit batch jobs from their home institution - or OSG-provided submit points - in order to access their local resources and expand
+elastically out to the OSG, leverage the distributed nature of our consortium.
+
+### Sharing Is Key
+
+*Sharing is a core principle of the OSG.*  Over 100 million CPU hours delivered on the OSG in the past year were opportunistic: they would have remained on but idle
+if it wasn't for the OSG. Sharing allows individual researchers to access larger computing resources and large organizations to keep their utilization high.
+
+### Resource Providers
+
+The Open Science Grid consists of computing and storage elements at over 100 individual sites spanning the United States.
+These sites, primarily at universities and national labs, range in size from a few hundred to tens of thousands of CPU cores.
+
+### The OSG Software Stack
+
+The OSG provides an integrated software stack to enable high throughput computing; [visit our technical documents website for information](docs/).
+
+### Find Us!
+
+Are you a user wanting more computing resources?
+
+Are you a resource provider wanting to join our collaboration?
+
+If so, find us at the [support desk](https://support.opensciencegrid.org).
+

_about/computation.md

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+---
+title: Computation on the OSG
+---
+
+*What kind of computational problems fit well on OSG?*
+
+Jobs submitted into the OSG will be executed on machines at several remote physical clusters. These machines may differ in terms of computing environment from the submit node. Therefore it is important that the jobs are as self-contained as possible by generic binaries and data that can be either carried with the job, or staged on demand. Please consider the following guidelines:
+
+1. Software should preferably be single threaded, using less than 2 GB memory and each invocation should run for 1-12 hours. Please contact the support listed below for more information about these capabilities. System level check pointing, such as the HTCondor standard universe, is not available. Application level check pointing, for example applications writing out state and restart files, can be made to work on the system.
+2. Compute sites in the OSG can be configured to use pre-emption, which means jobs can be automatically killed if higher priority jobs enter the system. Pre-empted jobs will restart on another site, but it is important that the jobs can handle multiple restarts.
+3. Binaries should preferably be statically linked. However, dynamically linked binaries with standard library dependencies, built for a 64-bit Red Hat Enterprise Linux (RHEL) 6 machines will also work. Also, interpreted languages such as Python or Perl will work as long as there are no special module requirements.
+4. Input and output data for each job should be < 10 GB to allow them to be pulled in by the jobs, processed and pushed back to the submit node. Note that the OSG Virtual Cluster does not currently have a global shared file system, so jobs with such dependencies will not work.
+5. Software dependencies can be difficult to accommodate unless the software can be staged with the job, or installed on the read-only distributed OASIS filesystem.
+
+The following are examples of computations that are not good matches for OSG:
+
+1. Tightly coupled computations, for example MPI based communication, will not work well on OSG due to the distributed nature of the infrastructure.
+2. Computations requiring a shared file system will not work, as there is no shared filesystem between the different clusters on OSG.
+3. Computations requiring complex software deployments are not a good fit. There is limited support for distributing software to the compute clusters, but for complex software, or licensed software, deployment can be a major task.
+

_about/introduction.md

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+---
+title: Introduction
+redirect_from: /about/index.html
+---
+
+### What we do
+
+The OSG provides common service and support for resource providers and scientific institutions using a distributed fabric of high throughput computational services. The OSG does not own resources but provides software and services to users and resource providers alike to enable the opportunistic usage and sharing of resources. The OSG is jointly funded by the Department of Energy and the National Science Foundation. [here]("http://www.opensciencegrid.org/wp-content/uploads/2015/09/OSG_Calling_Card_110515.pdf") for a two-page printable overview of OSG.
+
+The Open Science Grid (OSG) supports science such as:
+
+- High Energy Physics
+- Structural Biology
+- Community VO (multiple sciences): OSG Connect
+
+The OSG is primarily used as a high-throughput grid where scientific problems are solved by breaking them down into a very large number of individual jobs that can run independently. The most successful opportunistic applications run on the OSG share the following characteristics:
+
+- The application is a Linux application for the x86 or x86_64 architecture.
+- The application is single- or multi-threaded but does not require message passing.
+- The application has a small runtime between 1 and 24 hours.
+- The application can handle being unexpectedly killed and restarted.
+- The application is built from software that does not require contact to licensing servers.
+- The scientific problem can be described as a workflow consisting of jobs of such kind.
+- The scientific problem requires running a very large number of small jobs rather than a few large jobs.
+
+#### More about OSG
+
+- Please see the [system administrator docs](https://opensciencegrid.github.io/docs/) for more information regarding the OSG.
+- [Grid Accounting portal](https://gracc.opensciencegrid.org/)
+