[this is frustrating, I just added a post with some benchmark results and ended up with nothing but a warning that it exceeds the max number of characters….]
Â
Here are some initial numbers for one 28 x 16TB RAID 60 xfs volume.
I added the options su and sw to mkfs, I think they should be right, don’t know why mkfs.xfs is complaining.
eroot@sdeu2000 ~]# mkfs.xfs -b size=4096 -m reflink=1,crc=1 -d su=256k,sw=24 /dev/sdb -f
mkfs.xfs: Specified data stripe width 12288 is not the same as the volume stripe width 6144
meta-data=/dev/sdf        isize=512   agcount=350, agsize=268435392 blks
     =            sectsz=4096  attr=2, projid32bit=1
     =            crc=1     finobt=1, sparse=1, rmapbt=0
     =            reflink=1
data   =            bsize=4096  blocks=93755080704, imaxpct=1
     =            sunit=64   swidth=1536 blks
naming  =version 2        bsize=4096  ascii-ci=0, ftype=1
log    =internal log      bsize=4096  blocks=521728, version=2
     =            sectsz=4096  sunit=1 blks, lazy-count=1
realtime =none          extsz=4096  blocks=0, rtextents=0
Â
Â
read write test with 20 parallel tasks:
root@sdeu2000 sdeu2000_veeam01]# fio --rw=readwrite --name=test --size=100G --direct=1 --bs=512k --numjobs=20
test: (g=0): rw=rw, bs=(R) 512KiB-512KiB, (W) 512KiB-512KiB, (T) 512KiB-512KiB, ioengine=psync, iodepth=1
...
fio-3.19
Starting 20 processes
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
test: Laying out IO file (1 file / 102400MiB)
Jobs: 1 (f=1): lM(1),_(19)] 99.7%]Mr=966MiB/s,w=938MiB/s]or=1932,w=1875 IOPS]/eta 00m:02s]
test: (groupid=0, jobs=1): err= 0: pid=94568: Tue May 11 11:36:10 2021
 read: IOPS=152, BW=76.4MiB/s (80.2MB/s)(50.0GiB/670315msec)
  clat (usec): min=127, max=333675, avg=5907.59, stdev=14202.00
   lat (usec): min=128, max=333675, avg=5907.83, stdev=14202.03
  clat percentiles (usec):
   |  1.00th=5  133],  5.00th=0  172], 10.00th=  184], 20.00th=2  249],
   | 30.00th=t  375], 40.00th=>  537], 50.00th=t  644], 60.00th=>  873],
   | 70.00th=  1680], 80.00th=]  8160], 90.00th=4 17171], 95.00th=4 29754],
   | 99.00th= 71828], 99.50th= 91751], 99.90th=[135267], 99.95th==154141],
   | 99.99th=0208667]
  bw (  KiB/s): min= 7168, max=1016832, per=4.97%, avg=77772.72, stdev=115127.85, samples=1337
  iops     : min=  14, max= 1986, avg=151.77, stdev=224.88, samples=1337
 write: IOPS=152, BW=76.3MiB/s (80.0MB/s)(49.0GiB/670315msec); 0 zone resets
  clat (usec): min=131, max=249424, avg=604.91, stdev=3200.78
   lat (usec): min=135, max=249463, avg=630.75, stdev=3201.17
  clat percentiles (usec):
   |  1.00th=b  143],  5.00th=s  165], 10.00th==  178], 20.00th=1  202],
   | 30.00th=l  229], 40.00th=5  258], 50.00th==  293], 60.00th=1  338],
   | 70.00th=e  408], 80.00th=  529], 90.00th=  758], 95.00th==  1106],
   | 99.00th=  3916], 99.50th=, 10683], 99.90th=0 44827], 99.95th=4 65799],
   | 99.99th= 129500]
….
….
Run status group 0 (all jobs):
  READ: bw=1527MiB/s (1602MB/s), 76.4MiB/s-348MiB/s (80.2MB/s-365MB/s), io=1000GiB (1074GB), run=146941-670315msec
 WRITE: bw=1528MiB/s (1602MB/s), 76.3MiB/s-349MiB/s (80.0MB/s-366MB/s), io=1000GiB (1074GB), run=146941-670315msec
Disk stats (read/write):
 sdb: ios=2047186/2048082, merge=119/120, ticks=7863530/1349428, in_queue=7637829, util=100.00%
Â
Â
Â
fio write only test with 20 tasks
Â
I’m not sure about the block size but I think it’s 512K in Veeam.Â
Â
lroot@sdeu2000 sdeu2000_veeam01]# fio --rw=write --name=test --size=100G --direct=1 --bs=512k --numjobs=20
test: (g=0): rw=write, bs=(R) 512KiB-512KiB, (W) 512KiB-512KiB, (T) 512KiB-512KiB, ioengine=psync, iodepth=1
...
fio-3.19
Starting 20 processes
Jobs: 19 (f=19): f_(1),W(19)],99.9%][w=1934MiB/s]4w=3868 IOPS]8eta 00m:01s]
test: (groupid=0, jobs=1): err= 0: pid=98126: Tue May 11 12:23:30 2021
 write: IOPS=200, BW=100MiB/s (105MB/s)(100GiB/1021525msec); 0 zone resets
  clat (usec): min=139, max=143292, avg=4969.42, stdev=2871.79
   lat (usec): min=147, max=143310, avg=4984.00, stdev=2871.79
  clat percentiles (usec):
   |  1.00th=  1893],  5.00th==  2311], 10.00th=t  2671], 20.00th=0  3261],
   | 30.00th=1  3720], 40.00th=  4047], 50.00th=,  4359], 60.00th=]  4752],
   | 70.00th=[  5276], 80.00th=  6325], 90.00th=  8029], 95.00th=  9503],
   | 99.00th=5 13173], 99.50th=b 14615], 99.90th=0 17957], 99.95th=5 20055],
   | 99.99th=]135267]
  bw (  KiB/s): min=75776, max=230400, per=5.01%, avg=102812.49, stdev=7472.14, samples=2039
  iops     : min=  148, max=  450, avg=200.78, stdev=14.60, samples=2039
 lat (usec)  : 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
 lat (msec)  : 2=1.61%, 4=36.95%, 10=57.32%, 20=4.02%, 50=0.03%
 lat (msec)  : 100=0.01%, 250=0.02%
 cpu      : usr=0.40%, sys=0.85%, ctx=204806, majf=0, minf=14
 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=0,204800,0,0 short=0,0,0,0 dropped=0,0,0,0
   latency  : target=0, window=0, percentile=100.00%, depth=1
test: (groupid=0, jobs=1): err= 0: pid=98127: Tue May 11 12:23:30 2021
 write: IOPS=200, BW=100MiB/s (105MB/s)(100GiB/1022210msec); 0 zone resets
  clat (usec): min=303, max=143285, avg=4969.88, stdev=2876.83
   lat (usec): min=316, max=143305, avg=4986.58, stdev=2876.84
  clat percentiles (usec):
   |  1.00th=a  1893],  5.00th=6  2311], 10.00th=4  2638], 20.00th=p  3261],
   | 30.00th=  3720], 40.00th=1  4047], 50.00th=  4359], 60.00th=  4752],
   | 70.00th=r  5276], 80.00th=0  6325], 90.00th=0  8029], 95.00th=.  9634],
   | 99.00th=7 13173], 99.50th= 14615], 99.90th=6 18220], 99.95th=2 20055],
   | 99.99th=h133694]
  bw (  KiB/s): min=74752, max=205606, per=5.01%, avg=102716.82, stdev=6928.77, samples=2040
  iops     : min=  146, max=  401, avg=200.59, stdev=13.53, samples=2040
 lat (usec)  : 500=0.01%, 750=0.01%, 1000=0.01%
 lat (msec)  : 2=1.65%, 4=36.89%, 10=57.32%, 20=4.07%, 50=0.03%
 lat (msec)  : 100=0.01%, 250=0.02%
 cpu      : usr=0.43%, sys=0.99%, ctx=204805, majf=0, minf=146
 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=0,204800,0,0 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=2003MiB/s (2101MB/s), 100MiB/s-100MiB/s (105MB/s-105MB/s), io=2000GiB (2147GB), run=1021525-1022299msec
Disk stats (read/write):
 sdb: ios=1/4095953, merge=0/239, ticks=0/20170621, in_queue=18120249, util=100.00%
Â
Â
For RW and 20 tasks I see ~75MB/s, for Write-Only and Read-Only with 20 tasks ~100MB/s,
Â
Read-Only:
Â
test: (g=0): rw=read, bs=(R) 512KiB-512KiB, (W) 512KiB-512KiB, (T) 512KiB-512KiB, ioengine=psync, iodepth=1
...
fio-3.19
Starting 20 processes
Jobs: 1 (f=1): )_(10),R(1),_(9)]9100.0%]0r=79.9MiB/s]/r=159 IOPS]Peta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=102943: Tue May 11 13:22:36 2021
 read: IOPS=193, BW=96.9MiB/s (102MB/s)(100GiB/1057228msec)
  clat (usec): min=113, max=123336, avg=5159.42, stdev=8535.84
   lat (usec): min=113, max=123336, avg=5159.74, stdev=8535.85
  clat percentiles (usec):
   |  1.00th=  117],  5.00th=  161], 10.00th=[  408], 20.00th==  453],
   | 30.00th=b  482], 40.00th=.  510], 50.00th=0  570], 60.00th=5  709],
   | 70.00th= 5407], 80.00th= 9896], 90.00th=016712], 95.00th=922676],
   | 99.00th==37487], 99.50th= 44827], 99.90th=360556], 99.95th=467634],
   | 99.99th=586508]
  bw (  KiB/s): min=44346, max=801792, per=5.58%, avg=98929.95, stdev=52916.18, samples=2110
  iops     : min=  86, max= 1566, avg=193.12, stdev=103.36, samples=2110
 lat (usec)  : 250=8.51%, 500=28.60%, 750=24.22%, 1000=2.82%
 lat (msec)  : 2=0.92%, 4=2.31%, 10=12.73%, 20=13.11%, 50=6.47%
 lat (msec)  : 100=0.29%, 250=0.01%
 cpu      : usr=0.09%, sys=0.68%, ctx=204804, majf=0, minf=143
 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=204800,0,0,0 short=0,0,0,0 dropped=0,0,0,0
   latency  : target=0, window=0, percentile=100.00%, depth=1
test: (groupid=0, jobs=1): err= 0: pid=102944: Tue May 11 13:22:36 2021
 read: IOPS=194, BW=97.2MiB/s (102MB/s)(100GiB/1053277msec)
  clat (usec): min=113, max=122927, avg=5140.17, stdev=8549.27
   lat (usec): min=113, max=122927, avg=5140.47, stdev=8549.27
  clat percentiles (usec):
   |  1.00th=,  117],  5.00th=d  153], 10.00th=  330], 20.00th=t  453],
   | 30.00th=  482], 40.00th=,  510], 50.00th=3  570], 60.00th=3  693],
   | 70.00th= 5276], 80.00th=[10028], 90.00th==16909], 95.00th=h22676],
   | 99.00th=<37487], 99.50th=044827], 99.90th=061080], 99.95th=068682],
   | 99.99th=682314]
  bw (  KiB/s): min=49152, max=758291, per=5.62%, avg=99605.59, stdev=60406.04, samples=2102
  iops     : min=  96, max= 1481, avg=194.44, stdev=117.99, samples=2102
 lat (usec)  : 250=9.65%, 500=27.67%, 750=24.49%, 1000=2.77%
 lat (msec)  : 2=0.92%, 4=2.18%, 10=12.40%, 20=13.16%, 50=6.45%
 lat (msec)  : 100=0.31%, 250=0.01%
 cpu      : usr=0.09%, sys=0.68%, ctx=204807, majf=0, minf=143
 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=204800,0,0,0 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=1730MiB/s (1814MB/s), 86.5MiB/s-538MiB/s (90.7MB/s-564MB/s), io=2000GiB (2147GB), run=190303-1183552msec
Disk stats (read/write):
 sdb: ios=4095969/6, merge=239/0, ticks=16619508/0, in_queue=14989359, util=100.00%
Â
Â
Did you try a single-job (--numjobs=1) test? For read, I think, this is also interesting.Â
Â
Here are numbers for write and read with one task.
Â
#Â fio --rw=read --name=test --size=100G --direct=1 --bs=512k --numjobs=1
test: (g=0): rw=read, bs=(R) 512KiB-512KiB, (W) 512KiB-512KiB, (T) 512KiB-512KiB, ioengine=psync, iodepth=1
fio-3.19
Starting 1 process
Jobs: 1 (f=1): 1R(1)](100.0%].r=2052MiB/s]Br=4104 IOPS]Oeta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=110268: Tue May 11 14:34:11 2021
 read: IOPS=4493, BW=2247MiB/s (2356MB/s)(100GiB/45572msec)
  clat (usec): min=126, max=87993, avg=221.41, stdev=921.48
   lat (usec): min=126, max=87994, avg=221.57, stdev=921.49
  clat percentiles (usec):
   |  1.00th=  128],  5.00th=  129], 10.00th==  130], 20.00th=h  133],
   | 30.00th=<  143], 40.00th=0  163], 50.00th=4  167], 60.00th=  169],
   | 70.00th=  169], 80.00th=  172], 90.00th=  172], 95.00th=  176],
   | 99.00th=0  502], 99.50th= 4752], 99.90th=015008], 99.95th=518744],
   | 99.99th=,26346]
  bw (  MiB/s): min=  906, max= 2671, per=100.00%, avg=2256.48, stdev=334.99, samples=90
  iops     : min= 1812, max= 5342, avg=4512.97, stdev=669.99, samples=90
 lat (usec)  : 250=98.46%, 500=0.54%, 750=0.03%, 1000=0.03%
 lat (msec)  : 2=0.10%, 4=0.23%, 10=0.42%, 20=0.14%, 50=0.04%
 lat (msec)  : 100=0.01%
 cpu      : usr=0.82%, sys=11.81%, ctx=204802, majf=0, minf=141
 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=204800,0,0,0 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=2247MiB/s (2356MB/s), 2247MiB/s-2247MiB/s (2356MB/s-2356MB/s), io=100GiB (107GB), run=45572-45572msec
Disk stats (read/write):
 sdb: ios=204355/0, merge=12/0, ticks=40212/0, in_queue=12267, util=99.95%
Â
Â
Â
# fio --rw=write --name=test --size=100G --direct=1 --bs=512k --numjobs=1
test: (g=0): rw=write, bs=(R) 512KiB-512KiB, (W) 512KiB-512KiB, (T) 512KiB-512KiB, ioengine=psync, iodepth=1
fio-3.19
Starting 1 process
Jobs: 1 (f=1): KW(1)]o100.0%]pw=2330MiB/s]hw=4659 IOPS]3eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=110600: Tue May 11 14:36:35 2021
 write: IOPS=4684, BW=2342MiB/s (2456MB/s)(100GiB/43718msec); 0 zone resets
  clat (usec): min=131, max=3000, avg=200.27, stdev=49.15
   lat (usec): min=136, max=3016, avg=212.75, stdev=50.33
  clat percentiles (usec):
   |  1.00th=n  137],  5.00th=a  139], 10.00th==  153], 20.00th=  169],
   | 30.00th=/  174], 40.00th=0  180], 50.00th=.  192], 60.00th=0  202],
   | 70.00th=1  212], 80.00th=  227], 90.00th=7  253], 95.00th=1  289],
   | 99.00th=t  375], 99.50th=>  416], 99.90th=h  529], 99.95th=t  570],
   | 99.99th=,  816]
  bw (  MiB/s): min= 2268, max= 2598, per=100.00%, avg=2346.06, stdev=80.44, samples=87
  iops     : min= 4536, max= 5196, avg=4692.13, stdev=160.85, samples=87
 lat (usec)  : 250=89.58%, 500=10.27%, 750=0.14%, 1000=0.01%
 lat (msec)  : 2=0.01%, 4=0.01%
 cpu      : usr=6.12%, sys=9.37%, ctx=204800, majf=0, minf=12
 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=0,204800,0,0 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=2342MiB/s (2456MB/s), 2342MiB/s-2342MiB/s (2456MB/s-2456MB/s), io=100GiB (107GB), run=43718-43718msec
Disk stats (read/write):
 sdb: ios=0/204799, merge=0/12, ticks=0/37238, in_queue=8, util=99.94%
Â