• dd if=/dev/zero of=ddfile bs=8k count=100000
  • hdparm -tT /dev/md_d0

Samsung 840 SSD

  • Timing cached reads: 17108 MB in 2.00 seconds = 8561.21 MB/sec
  • Timing buffered disk reads: 1480 MB in 3.00 seconds = 493.27 MB/sec

PCI-E SSD (raid 8ea ssd)

  • Timing cached reads: 16362 MB in 2.00 seconds = 8189.62 MB/sec
  • Timing buffered disk reads: 4974 MB in 3.00 seconds = 1657.88 MB/sec
  • 819200000 바이트 (819 MB) 복사됨, 1.00689 초, 814 MB/초

AWS Standard EBS

  • Timing cached reads: 5166 MB in 2.00 seconds = 2587.90 MB/sec
  • Timing buffered disk reads: 218 MB in 3.01 seconds = 72.50 MB/sec
  • 819200000 bytes (819 MB) copied, 15.2149 s, 53.8 MB/s

AWS SSD

  • Timing cached reads: 21808 MB in 1.98 seconds = 10992.64 MB/sec
  • Timing buffered disk reads: 2012 MB in 3.00 seconds = 670.46 MB/sec
  • 819200000 bytes (819 MB) copied, 1.20211 s, 681 MB/s

AWS Provisioned EBS (200 iops)

  • Timing cached reads: 22066 MB in 1.98 seconds = 11123.83 MB/sec
  • Timing buffered disk reads: 44 MB in 3.01 seconds = 14.61 MB/sec

DigitalOcean Droplet SSD

  • Timing cached reads: 13458 MB in 2.00 seconds = 6735.64 MB/sec
  • Timing buffered disk reads: 1156 MB in 3.00 seconds = 385.11 MB/sec
  • 819200000 bytes (819 MB) copied, 3.34865 s, 245 MB/s