ディスクの内周と外周を測ってみる.sh

test.log

[ryozi@localhost ~]$ # 外周読み取り
[ryozi@localhost ~]$ sudo fio -direct=1 -name=test -filename=$DEVICE -rw=read -bs=1M -size=$SIZE -offset=0
fio-3.35
Starting 1 process
Jobs: 1 (f=1)
Jobs: 1 (f=1): [R(1)][100.0%][r=212MiB/s][r=212 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=7734: Sat Nov 25 09:13:47 2023
  read: IOPS=202, BW=202MiB/s (212MB/s)(4096MiB/20246msec)
    clat (usec): min=1883, max=341821, avg=4942.21, stdev=5418.66
     lat (usec): min=1883, max=341821, avg=4942.27, stdev=5418.66
    clat percentiles (msec):
     |  1.00th=[    5],  5.00th=[    5], 10.00th=[    5], 20.00th=[    5],
     | 30.00th=[    5], 40.00th=[    5], 50.00th=[    5], 60.00th=[    6],
     | 70.00th=[    6], 80.00th=[    6], 90.00th=[    6], 95.00th=[    6],
     | 99.00th=[    6], 99.50th=[    7], 99.90th=[   14], 99.95th=[   50],
     | 99.99th=[  342]
   bw (  KiB/s): min=73728, max=221184, per=100.00%, avg=207411.20, stdev=23030.75, samples=40
   iops        : min=   72, max=  216, avg=202.55, stdev=22.49, samples=40
  lat (msec)   : 2=0.17%, 4=0.02%, 10=99.56%, 20=0.15%, 50=0.07%
  lat (msec)   : 500=0.02%
  cpu          : usr=0.02%, sys=0.24%, ctx=8192, majf=0, minf=266
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=4096,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=202MiB/s (212MB/s), 202MiB/s-202MiB/s (212MB/s-212MB/s), io=4096MiB (4295MB), run=20246-20246msec

Disk stats (read/write):
  sdb: ios=8164/0, merge=0/0, ticks=33394/0, in_queue=33393, util=99.52%
[ryozi@localhost ~]$ # 内周読み取り
[ryozi@localhost ~]$ sudo fio -direct=1 -name=test -filename=$DEVICE -rw=read -bs=1M -size=$SIZE -offset=$OFFSET
test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=1
fio-3.35
Starting 1 process
Jobs: 1 (f=1): [R(1)][100.0%][r=90.0MiB/s][r=90 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=7751: Sat Nov 25 09:14:32 2023
  read: IOPS=92, BW=92.6MiB/s (97.1MB/s)(4096MiB/44236msec)
    clat (usec): min=1932, max=55396, avg=10799.18, stdev=1665.47
     lat (usec): min=1932, max=55396, avg=10799.22, stdev=1665.47
    clat percentiles (usec):
     |  1.00th=[ 9372],  5.00th=[10028], 10.00th=[10028], 20.00th=[10159],
     | 30.00th=[10683], 40.00th=[10814], 50.00th=[10945], 60.00th=[10945],
     | 70.00th=[10945], 80.00th=[11076], 90.00th=[11076], 95.00th=[11207],
     | 99.00th=[11338], 99.50th=[12256], 99.90th=[54789], 99.95th=[55313],
     | 99.99th=[55313]
   bw (  KiB/s): min=86016, max=102400, per=99.92%, avg=94743.27, stdev=3519.88, samples=88
   iops        : min=   84, max=  100, avg=92.52, stdev= 3.44, samples=88
  lat (msec)   : 2=0.02%, 4=0.02%, 10=4.64%, 20=95.12%, 50=0.07%
  lat (msec)   : 100=0.12%
  cpu          : usr=0.00%, sys=0.11%, ctx=8192, majf=0, minf=264
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=4096,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=92.6MiB/s (97.1MB/s), 92.6MiB/s-92.6MiB/s (97.1MB/s-97.1MB/s), io=4096MiB (4295MB), run=44236-44236msec

Disk stats (read/write):
  sdb: ios=4085/0, merge=0/0, ticks=44089/0, in_queue=44089, util=99.79%
[ryozi@localhost ~]$
[ryozi@localhost ~]$ # 外周書き込み
[ryozi@localhost ~]$ sudo fio -direct=1 -name=test -filename=$DEVICE -rw=write -bs=1M -size=$SIZE -offset=0
test: (g=0): rw=write, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=1
fio-3.35
Starting 1 process
Jobs: 1 (f=1): [W(1)][100.0%][w=203MiB/s][w=203 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=7768: Sat Nov 25 09:14:52 2023
  write: IOPS=204, BW=205MiB/s (215MB/s)(4096MiB/19981msec); 0 zone resets
    clat (usec): min=2018, max=49871, avg=4870.87, stdev=1385.69
     lat (usec): min=2025, max=49878, avg=4877.64, stdev=1385.68
    clat percentiles (usec):
     |  1.00th=[ 4293],  5.00th=[ 4293], 10.00th=[ 4293], 20.00th=[ 4424],
     | 30.00th=[ 4490], 40.00th=[ 4621], 50.00th=[ 4686], 60.00th=[ 5080],
     | 70.00th=[ 5145], 80.00th=[ 5276], 90.00th=[ 5407], 95.00th=[ 5473],
     | 99.00th=[ 5473], 99.50th=[ 6652], 99.90th=[16581], 99.95th=[49546],
     | 99.99th=[50070]
   bw (  KiB/s): min=182272, max=223232, per=99.91%, avg=209736.21, stdev=9239.54, samples=39
   iops        : min=  178, max=  218, avg=204.82, stdev= 9.02, samples=39
  lat (msec)   : 4=0.12%, 10=99.54%, 20=0.27%, 50=0.07%
  cpu          : usr=0.18%, sys=0.29%, ctx=4098, majf=0, minf=11
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=0,4096,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: bw=205MiB/s (215MB/s), 205MiB/s-205MiB/s (215MB/s-215MB/s), io=4096MiB (4295MB), run=19981-19981msec

Disk stats (read/write):
  sdb: ios=46/8156, merge=0/0, ticks=6/32723, in_queue=32729, util=99.53%
[ryozi@localhost ~]$ # 内周書き込み
[ryozi@localhost ~]$ sudo fio -direct=1 -name=test -filename=$DEVICE -rw=write -bs=1M -size=$SIZE -offset=$OFFSET
test: (g=0): rw=write, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=1
fio-3.35
Starting 1 process
Jobs: 1 (f=1): [W(1)][100.0%][w=95.0MiB/s][w=95 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=7799: Sat Nov 25 09:15:36 2023
  write: IOPS=92, BW=92.6MiB/s (97.1MB/s)(4096MiB/44247msec); 0 zone resets
    clat (usec): min=1984, max=125141, avg=10795.91, stdev=2313.25
     lat (usec): min=1989, max=125146, avg=10801.89, stdev=2313.24
    clat percentiles (msec):
     |  1.00th=[   10],  5.00th=[   11], 10.00th=[   11], 20.00th=[   11],
     | 30.00th=[   11], 40.00th=[   11], 50.00th=[   11], 60.00th=[   11],
     | 70.00th=[   11], 80.00th=[   12], 90.00th=[   12], 95.00th=[   12],
     | 99.00th=[   12], 99.50th=[   13], 99.90th=[   34], 99.95th=[   56],
     | 99.99th=[  126]
   bw (  KiB/s): min=73728, max=102400, per=99.95%, avg=94743.27, stdev=4054.53, samples=88
   iops        : min=   72, max=  100, avg=92.52, stdev= 3.96, samples=88
  lat (msec)   : 2=0.15%, 4=0.07%, 10=4.66%, 20=94.87%, 50=0.15%
  lat (msec)   : 100=0.07%, 250=0.02%
  cpu          : usr=0.06%, sys=0.15%, ctx=4100, majf=0, minf=9
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=0,4096,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: bw=92.6MiB/s (97.1MB/s), 92.6MiB/s-92.6MiB/s (97.1MB/s-97.1MB/s), io=4096MiB (4295MB), run=44247-44247msec

Disk stats (read/write):
  sdb: ios=46/8172, merge=0/0, ticks=29/73037, in_queue=73067, util=99.85%
[ryozi@localhost ~]$

test.sh

# 対象デバイスIDとストレージサイズを得る
sudo fdisk -l

# 出力例: 
# Disk /dev/sdb: 5.46 TiB, 6001175126016 bytes, 11721045168 sectors
# Disk model: WDC WD60EZAX-00C
# Units: sectors of 1 * 512 = 512 bytes
# Sector size (logical/physical): 512 bytes / 4096 bytes
# I/O size (minimum/optimal): 4096 bytes / 4096 bytes


# bytes単位でストレージサイズ指定
STORAGE_SIZE=6001175126016

# デバイス指定 ※大事なデータがあるデバイスは指定しないこと
DEVICE=/dev/sdX

# 計測サイズ
DATA_SIZE=$((1024*1024*1024*4))

# 内周の開始位置
OFFSET=$(($STORAGE_SIZE - $SIZE))

# 外周読み取り
sudo fio -direct=1 -name=test -filename=$DEVICE -rw=read -bs=1M -size=$SIZE -offset=0
# 内周読み取り
sudo fio -direct=1 -name=test -filename=$DEVICE -rw=read -bs=1M -size=$SIZE -offset=$OFFSET

# 外周書き込み
sudo fio -direct=1 -name=test -filename=$DEVICE -rw=write -bs=1M -size=$SIZE -offset=0
# 内周書き込み
sudo fio -direct=1 -name=test -filename=$DEVICE -rw=write -bs=1M -size=$SIZE -offset=$OFFSET