3 ms·

I recently used parallel to write a 1TB data file for testing using all cores seq 0 10000 | parallel dd if=/dev/urandom of=/mnt/foo/input bs=10M count=10 see

I recently used parallel to write a 1TB data file for testing using all cores seq 0 10000 | parallel dd if=/dev/urandom of=/mnt/foo/input bs=10M count=10 seek={}0

codetrotter 4y ago
Was it noticeably different from dd if=/dev/urandom of=/mnt/foo/input bs=10M count=100000 in the amount of time that it took?
- rockwotj 4y ago
  Yes, I had 16 cores and I gave up on the this version after several minutes. I don't remember the disk throughput difference but it was significant
  - adastra22 4y ago
    This should be I/o limited though.
    - rockwotj 4y ago
      It was a NVMe disk, so it required all cores to saturate the device