computer science

System G (supercomputer)

System G (supercomputer) is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand System G (supercomputer) rather than just read about it. In short: System G was a cluster supercomputer at Virginia Tech consisting of 324 Apple Mac Pro computers with a total of 2592 processing cores. It was finished in November 2008 and ranked 279 in that month's edition of TOP500, running at 16.78 teraflops and peaking at 22.94 teraflops.

Key takeaways

System G (supercomputer) belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect System G (supercomputer) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of System G (supercomputer) from memory before moving on to harder problems.

Reference excerpt

System G was a cluster supercomputer at Virginia Tech consisting of 324 Apple Mac Pro computers with a total of 2592 processing cores. It was finished in November 2008 and ranked 279 in that month's edition of TOP500, running at 16.78 teraflops and peaking at 22.94 teraflops. It ran at a "sustained (Linpack) performance of 22.8 TFlops". It transmitted data between nodes over Gigabit Ethernet and 40 Gbit/s Infiniband.

Mac Pro nodes Each of the 324 Mac Pro machines contained two quad-core 2.8 GHz Xeon processors and 8 gigabytes of RAM.

Namesake System G's name stemmed from its homage to System X and to its focus on green computing—the cluster has thousands of power and thermal sensors to test high performance computing at low power requirements and was, at the time, the largest power-aware research system in the world.

References

External links Computer Science at Virginia Tech: System G Virginia Tech: Center for High-End Computing Systems (‘CHECS’) Ars Technica: Virginia Tech building super computer out of 324 Mac Pros TOP500 website

Worked examples

Example 1 — a first encounter with System G (supercomputer)

Start with the simplest possible case. Write down what System G (supercomputer) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to System G (supercomputer) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about System G (supercomputer) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of System G (supercomputer)

In research: System G (supercomputer) appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses System G (supercomputer) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: System G (supercomputer) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer hardware stubs, Virginia Tech, X86 supercomputers, so understanding it makes those chapters shorter.
In everyday life: Look for System G (supercomputer) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study System G (supercomputer) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what System G (supercomputer) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain System G (supercomputer) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is System G (supercomputer) in simple terms?

Why does System G (supercomputer) matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study System G (supercomputer)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on System G (supercomputer).