Hacker News Reader

Comment by kawsper | Hacker News Reader

This is mine old $20 located in London, doing exactly nothing, I just created it last week, it seems very slow in comparison:

  dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1,1 GB) copied, 13,6791 s, 78,5 MB/s

  hdparm -tT /dev/xvda
  /dev/xvda:
  Timing cached reads:   3580 MB in  2.00 seconds = 1794.00 MB/sec
  Timing buffered disk reads: 336 MB in  3.01 seconds = 111.75 MB/sec

View on HN

Dallas data center, not upgraded, faster than London, slower than upgrade. ;)

  $> dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1.1 GB) copied, 2.19598 s, 489 MB/s

  $> hdparm -tT /dev/xvda
  /dev/xvda:
  Timing cached reads:   12446 MB in  1.98 seconds = 6273.29 MB/sec
  Timing buffered disk reads: 1768 MB in  3.00 seconds = 589.00 MB/sec

Here's mine, with SSD upgrade:

  dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1.1 GB) copied, 2.17496 s, 494 MB/s

  hdparm -tT /dev/xvda
  /dev/xvda:
   Timing cached reads:   18560 MB in  1.98 seconds = 9358.78   MB/sec
   Timing buffered disk reads: 2510 MB in  3.00 seconds =   836.61 MB/sec`

Reply on news.ycombinator.com