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What do you make of these ioping statistics?

rchurchrchurch Barred
edited June 2015 in Help

** ioping -c 10 ./**

root@localhost:~# ioping -c 10 ./
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=1 time=173 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=2 time=344 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=3 time=299 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=4 time=239 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=5 time=304 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=6 time=274 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=7 time=119.0 ms
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=8 time=338 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=9 time=275 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=10 time=305 us

--- ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126) ioping statistics ---
10 requests completed in 9.1 s, 82 iops, 329.0 KiB/s
min/avg/max/mdev = 173 us / 12.2 ms / 119.0 ms / 35.6 ms
root@localhost:~# ioping -c 10 ./
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=1 time=397 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=2 time=354 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=3 time=19.4 ms
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=4 time=317 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=5 time=300 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=6 time=283 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=7 time=536 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=8 time=2.9 ms
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=9 time=314 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=10 time=2.2 ms

--- ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126) ioping statistics ---
10 requests completed in 9.0 s, 370 iops, 1.4 MiB/s
min/avg/max/mdev = 283 us / 2.7 ms / 19.4 ms / 5.6 ms
root@localhost:~# ioping -c 10 ./
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=1 time=149 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=2 time=358 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=3 time=379 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=4 time=278 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=5 time=323 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=6 time=7.1 ms
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=7 time=395 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=8 time=318 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=9 time=496 us
4.0 KiB from ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126): request=10 time=307 us

--- ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126) ioping statistics ---
10 requests completed in 9.0 s, 988 iops, 3.9 MiB/s
min/avg/max/mdev = 149 us / 1.0 ms / 7.1 ms / 2.0 ms

** time ioping -RD ./ **

root@localhost:~# time ioping -RD ./

--- ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126) ioping statistics ---
153 requests completed in 3.1 s, 49 iops, 199.3 KiB/s
min/avg/max/mdev = 119 us / 20.1 ms / 151.6 ms / 11.5 ms

real    5m48.977s
user    0m0.088s 
sys     0m2.074s 
root@localhost:~# time ioping -RD ./

--- ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126) ioping statistics ---
140 requests completed in 3.0 s, 46 iops, 186.6 KiB/s
min/avg/max/mdev = 100 us / 21.4 ms / 95.2 ms / 9.4 ms

real    6m1.357s 
user    0m0.092s 
sys     0m2.088s 
root@localhost:~# time ioping -RD ./

--- ./ (ext4 /dev/disk/by-uuid/7030bf41-6f7a-421b-bfec-d88ad25d4126) ioping statistics ---
156 requests completed in 3.0 s, 52 iops, 208.1 KiB/s
min/avg/max/mdev = 92 us / 19.2 ms / 106.5 ms / 8.6 ms

real    5m38.132s
user    0m0.127s 
sys     0m2.202s

How long is a normal **ioping -RD ./ **supposed to take?

Comments

  • ClouviderClouvider Member, Patron Provider

    It depends on the drive, raid card if any, load, connection (local or SAN) etc.

    Do you have any specific performance issue with this server?

  • dediservedediserve Member

    IOps seem low, but the latency looks 'ok'

  • rchurchrchurch Barred
    edited June 2015

    @Clouvider said:
    It depends on the drive, raid card if any, load, connection (local or SAN) etc.

    Do you have any specific performance issue with this server?

    Activities which need to read from the disk are very slow. dd commands are not stellar but I have seen worse.

    root@localhost:~# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync; rm test
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 10.9829 s, 97.8 MB/s
  • rchurchrchurch Barred

    @Clouvider said:
    It depends on the drive, raid card if any, load, connection (local or SAN) etc.

    Do you have any specific performance issue with this server?

    It is a VPS and it has been usable until the last 24 hours or so.

  • dediservedediserve Member
    edited June 2015

    Just ran a quick comparison

    `[root@web ioping-0.6]# time ioping -RD ./

--- ./ (ext3 /dev/xvda1) ioping statistics ---
13563 requests completed in 3000.2 ms, 10866 iops, 42.4 mb/s
min/avg/max/mdev = 0.1/0.1/19.5/0.2 ms

real    0m5.085s
user    0m0.055s
sys 0m0.860s
`
  • ClouviderClouvider Member, Patron Provider
    edited June 2015

    Looks fairly consistent with LE* VPS with local storage and SATA drives. Bear in mind this drives aren't dedicated to you, they are shared with other, some times with a lot of, customers.

  • dediservedediserve Member

    and the same VM

    [root@web ioping-0.6]# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync; rm test
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 2.36618 s, 454 MB/s
  • ClouviderClouvider Member, Patron Provider

    @dediserve results from Cloud on SSD's :)?

  • dediservedediserve Member

    @Clouvider said:
    dediserve results from Cloud on SSD's :)?

    BL460C Blade with 12 drive enterprise SSD array :)

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