In particular, I would like to give a special thanks to Kei Simmel who served as our translator to help us manage our language barrier. To verify the correctness of a large integer addition, subtraction, or multiplication, simply take the modulus of both operands over a sufficiently large prime number p. The concept is very simple. It is known to produce more heat than both Linpack and Prime95 on the Intel Nehalem-based processors when HyperThreading Technology is enabled. Fortunately, the error-detection was able to catch the error.

Uploader: Zulkisho
Date Added: 16 April 2009
File Size: 12.25 Mb
Operating Systems: Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads: 11166
Price: Free* [*Free Regsitration Required]

I attempt reproduce the error on my own machine.

At just a mere 8 days into the computation, a hardware error occured. Week 11 Progress Update: And therefore were not used for this computation.

The Scaled Remainder Tree algorithm was added to y-cruncher in v0. As with all significant computations that are done using y-cruncher suppermicro A Multi-Threaded Pi Programa screenshot and validation is included.

5 Trillion Digits of Pi – New World Record

Moore’s Law for disk bandwidth has not been keeping up with that of CPU computing power. Due to time constraints, most of the algorithms that are used for disk operations had been “forcibly ported” from the in-ram equivalents with little or no supermicro aoc sat2 mv8 to performance implications.

supermicro aoc sat2 mv8 But power outages are another. All basic arithmetic uses bit integer-words. More cores and high CPU utilization means nothing if the software is bounded by another resource such as memory bandwidth.

Therefore, it is best place to place high-level redundancy checks. Although several different methods of error-detection were used, only one was predominant – the Modular Hash Check. To combat this problem, y-cruncher supports the use of multiple sipermicro drives to increase disk bandwidth.

One radix conversion was done to convert the digits from base 16 to sa2 See Detailed Timeline Finish: Week 2 Progress Mf8 Fortunately, the error-detection was able to catch the error. Although the main computation was done on one computer.

The program’s internal error-detection detects a computation error. There are number of major optimizations that y-cruncher currently does not use. For better or worse, highly-optimized programs have a tendency to supermicro aoc sat2 mv8 extremely stressful to the hardware.

Storage RAID / HBA Cards | SuperStorage Solutions | Products – Super Micro Computer, Inc.

Redundancy checking within the radix recursion was included supfrmicro the first version supermicro aoc sat2 mv8. So that, if needed, it can restart from them. The radix conversion was verified using modular hash checks. I don’t supermicro aoc sat2 mv8 any Japanese, and Shigeru Kondo doesn’t speak much English There were other computers that were involved. However, prior to v0. Chudnovsky’s Formula was used with Binary Splitting to compute 4,, hexadecimal digits of Pi.

Even on stable and non-overclocked hardware, there is a non-negligible chance of a hardware error if it is put under stress for an extended period of time.

Week 9 Progress Update: The screenshot provided here is simply the one that shows the greater portion of the computation. Based on the nature of the Scaled Remainder Tree algorithm for conversion, it is trivial supermicro aoc sat2 mv8 insert redundancy checks into many places of the algorithm with negligible computation overhead the details of which will be omitted for conciseness. So with that, we decided supegmicro see how far we could push the limits of personal computing using personally owned hardware.

Pi – 5 Trillion Digits

Including multiple checkpoints within the series summation. Run the BBP formulas to verify the main computation.

Checkpointing was added to y-cruncher in v0. Of course this relies on the swap disks being functional after the disaster, but this is easily fixed if backups supermicro aoc sat2 mv8 the swap disks are made periodically.

They are aof more powerful and cheaper than high-end CPUs. The method of verification is similar if not identical to the method that Fabrice Bellard used to verify his record of 2.