Wenn ich mir auf einem RS 8000 G11 folgendes Ergebnis ([r=475,w=475 IOPS]) so anschaue, so sieht es so aus, dass auf dem Host eher nur SATA SSD´s im RAID 1 Verbund verbaut sind.
fiotest: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.19
Starting 1 process
fiotest: Laying out IO file (1 file / 10240MiB)
Jobs: 1 (f=1): [m(1)][100.0%][r=1902KiB/s,w=1902KiB/s][r=475,w=475 IOPS][eta 00m:00s]
fiotest: (groupid=0, jobs=1): err= 0: pid=1146: Thu Jul 30 20:55:39 2026
read: IOPS=450, BW=1803KiB/s (1847kB/s)(106MiB/60001msec)
slat (usec): min=5, max=211, avg=13.17, stdev= 5.70
clat (nsec): min=861, max=8901.3k, avg=185372.90, stdev=95952.63
lat (usec): min=24, max=8926, avg=198.70, stdev=96.80
clat percentiles (usec):
| 1.00th=[ 20], 5.00th=[ 24], 10.00th=[ 29], 20.00th=[ 159],
| 30.00th=[ 178], 40.00th=[ 190], 50.00th=[ 202], 60.00th=[ 215],
| 70.00th=[ 227], 80.00th=[ 241], 90.00th=[ 262], 95.00th=[ 277],
| 99.00th=[ 314], 99.50th=[ 338], 99.90th=[ 537], 99.95th=[ 750],
| 99.99th=[ 1418]
bw ( KiB/s): min= 1304, max= 2208, per=100.00%, avg=1804.93, stdev=185.14, samples=119
iops : min= 326, max= 552, avg=451.23, stdev=46.30, samples=119
write: IOPS=450, BW=1802KiB/s (1845kB/s)(106MiB/60001msec); 0 zone resets
slat (nsec): min=5958, max=70646, avg=14046.75, stdev=5371.07
clat (usec): min=422, max=6578, avg=2003.36, stdev=337.57
lat (usec): min=429, max=6593, avg=2017.56, stdev=338.17
clat percentiles (usec):
| 1.00th=[ 1172], 5.00th=[ 1369], 10.00th=[ 1663], 20.00th=[ 1795],
| 30.00th=[ 1876], 40.00th=[ 1942], 50.00th=[ 2008], 60.00th=[ 2073],
| 70.00th=[ 2147], 80.00th=[ 2245], 90.00th=[ 2376], 95.00th=[ 2507],
| 99.00th=[ 2900], 99.50th=[ 3228], 99.90th=[ 4178], 99.95th=[ 4555],
| 99.99th=[ 5866]
bw ( KiB/s): min= 1552, max= 2144, per=100.00%, avg=1803.80, stdev=116.83, samples=119
iops : min= 388, max= 536, avg=450.95, stdev=29.21, samples=119
lat (nsec) : 1000=0.01%
lat (usec) : 20=0.70%, 50=7.21%, 100=0.18%, 250=34.54%, 500=7.36%
lat (usec) : 750=0.05%, 1000=0.06%
lat (msec) : 2=24.89%, 4=24.95%, 10=0.06%
cpu : usr=0.48%, sys=1.88%, ctx=54076, majf=0, minf=16
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=27050,27024,0,0 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=1803KiB/s (1847kB/s), 1803KiB/s-1803KiB/s (1847kB/s-1847kB/s), io=106MiB (111MB), run=60001-60001msec
WRITE: bw=1802KiB/s (1845kB/s), 1802KiB/s-1802KiB/s (1845kB/s-1845kB/s), io=106MiB (111MB), run=60001-60001msec
Disk stats (read/write):
vda: ios=26979/80919, merge=0/26970, ticks=4816/51350, in_queue=105257, util=94.05%
real 1m24,772s
user 0m2,322s
sys 0m15,752s
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