benchmarking the storages: iSCSI Enterprise Target (+Software RAID5)

Posted on by Daniel Kirstenpfad

This time we got a Software RAID5 Volume with 3 drives which made a volume size of 976784130 sectors = 476945 Megabyte. This Volume is exported with the iSCSI Enterprise Target Software for Linux.

Interface-Transferrate with a blocksize of 128 sectors at 0.0 percent of the capacity:

sequential read rate medium (unthrottled): 61384 Kilobyte/s
sequential read rate Read-Ahead (Latency 1.15 ms): 67472 Kilobyte/s
repeatedly sequential read (“coretest”): 54294 Kilobyte/s

permanent transfer rate: (blocksize: 128 sectors):
read:

  • Average: 51913.4 Kilobyte/s
  • Minimum: 49738.2 Kilobyte/s
  • Maximum: 63889.7 Kilobyte/s

write:

  • Average: 9080.2 Kilobyte/s
  • Minimum: 6650.9 Kilobyte/s
  • Maximum: 10129.3 Kilobyte/s

access time read:

  • Average: 13.47 ms
  • Minimum: 0.12 ms
  • Maximum: 28.65 ms

access time write:

  • Average: 38.82 ms
  • Minimum: 10.10 ms
  • Maximum: 108.19 ms

access time read (<504 MByte):

  • Average: 6.09 ms
  • Minimum: 0.12 ms
  • Maximum: 19.58 ms

access time write (<504 MByte):

  • Average: 14.42 ms
  • Minimum: 0.37 ms
  • Maximum: 75.51 ms