Quote Originally Posted by Sandon View Post
Performance test is looking better with a new raid controlller.. hopefully should speed up my 13.3 trillion calculation by quite a bit I hope:

Code:
Sequential Write:         1.59 GB/s
Sequential Read:          1.77 GB/s
Threshold Strided Write:   864 MB/s
Threshold Strided Read:    881 MB/s

Overlapped VST-I/O Ratio: 0.779955

Notes:

  - The overall I/O speed is unable to keep up with the CPU(s).
    The I/O throughput is 1.28213x slower than the CPU throughput.
    Large computations will be significantly slowed down by disk access.
    I/O bandwidth can be increased in a number of ways:
      - Add more drives in parallel. This is the obvious way.
        Many machines have 4 or more drives just to run this program!
      - Defragment the drives.
      - Use empty drives. Empty and freshly formatted drives perform best.

  - Your threshold non-sequential I/O bandwidth is very high.
    This may cause sub-optimal algorithm selection for large computations.
    The optimal ratio between sequential/non-sequential I/O is about 3 to 1.
    It is recommended to decrease the "Min I/O Size" setting and re-run
    this benchmark.
I lol'd a bit during the sequential read test for a while it was > 2 GB/sec and I saw what I think is an easter egg =)
Code:
Sequential Read:          2.01 GB/s  WTF?!?!
The WTF?!?! was in blue.
Yeah, that's an easter egg. I should probably raise the threshold for that. I set it about 2 years ago and it's clearly becoming too easy to hit 2GB/s.
Back then, it was only possible via ram drive.

Let me know when the 13.3 trillion digit computation is getting near the end. (if you're still running it) Assuming no one beats you to it, it's going to be a new world record.
But to qualify as a new record, it needs to be verified. So at some point, somebody (either you, me, or someone else) will need to kick off the BBP program. That will probably take about a week on my spare machine (i7 920 @ 3.5 GHz).