Superb IO

Kairus

@speckl said: It's really the only way to realistically provide IO statistics. The higher the single read/write typically the random read/writes are fast as well.

ioping is better

ramnet

Bonnie++ is better still. Heck, even Unix Bench is better than dd. dd was never designed for benchmarking anything and should not be used like that.

Right tool for the job.

subigo

Or how about hosts just start making entire node stats available to the public? Throw up some sar/iostat reports on a public page and let people get a real idea of how loaded the node is and what to expect before purchasing a vps.

gsrdgrdghd

@subigo said: Or how about hosts just start making entire node stats available to the public?

What would prevent a host from just making up/faking stats?

subigo

@gsrdgrdghd said: What would prevent a host from just making up/faking stats?

It's pretty easy to tell if someone is faking a sar/iostat report... especially since it would be automatically updating every ten minutes (by default).

Derek

This is on my netbook

Done on 5200rpm

root@laptop:/root# ioping -R /dev/sda

--- /dev/sda (device 232.9 Gb) ioping statistics ---
175 requests completed in 3013.0 ms, 58 iops, 0.2 mb/s
min/avg/max/mdev = 5.6/17.1/59.4/5.9 ms

root@laptop:/root# ioping -RL /dev/sda

--- /dev/sda (device 232.9 Gb) ioping statistics ---
641 requests completed in 3062.2 ms, 216 iops, 54.1 mb/s
min/avg/max/mdev = 1.7/4.6/91.6/8.4 ms

Done on ram, DDR2, 800mhz


root@laptop:/root# ioping -R /dev/shm

--- /dev/shm (tmpfs none) ioping statistics ---
29094 requests completed in 3000.2 ms, 105573 iops, 412.4 mb/s
min/avg/max/mdev = 0.0/0.0/0.4/0.0 ms

root@laptop:/root# ioping -RL /dev/shm

--- /dev/shm (tmpfs none) ioping statistics ---
8347 requests completed in 3000.2 ms, 4695 iops, 1173.6 mb/s
min/avg/max/mdev = 0.1/0.2/95.7/1.1 ms

huluwa

root@buyvm5:~# dd if=/dev/zero of=test bs=64k count=32k conv=fdatasync
32768+0 records in
32768+0 records out
2147483648 bytes (2.1 GB) copied, 6.34806 s, 338 MB/s

@Damian said: What happens if you make count=32k?

Derek

Done on a Expensive VPS provider

[root@main ~]# ioping -RL .

--- . (simfs /vz/private/157) ioping statistics ---
763 requests completed in 3001.3 ms, 262 iops, 65.4 mb/s
min/avg/max/mdev = 1.5/3.8/244.7/13.6 ms

[root@main ~]# ioping -R .

--- . (simfs /vz/private/157) ioping statistics ---
394 requests completed in 3002.8 ms, 132 iops, 0.5 mb/s
min/avg/max/mdev = 0.2/7.6/225.0/16.5 ms

Francisco

@Derek - do they mention any IOP/s limits?

Francisco

OneTwo

What disks you use to get such high IO?

Kairus

ioping -R C:\

--- C:\ ( ) ioping statistics ---
25000 requests completed in 3000.2 ms, 8338 iops, 32.6 mb/s
min/avg/max/mdev = 0.0/0.1/1.0/0.3 ms

ioping -R \

--- \ ( ) ioping statistics ---
587 requests completed in 3001.2 ms, 196 iops, 0.8 mb/s
min/avg/max/mdev = 0.0/5.1/26.0/3.9 ms

My computer - SSD and a RAID 0 array. It's cool they have a Windows port. Interesting to compare the results to VPS providers.

Derek

@Francisco said: @Derek - do they mention any IOP/s limits?

Francisco

Not at all. I pay $15/mo for it as well.

Francisco

@Derek said: Not at all. I pay $15/mo for it as well.

Francisco

Derek

http://www.newegg.com/Product/Product.aspx?Item=N82E16820227765

Max Sequential Read
Up to 1900 MB/s

Max Sequential Write
Up to 1725 MB/s

4KB Random Write
Up to 245,000 IOPS

MTBF
1,000,000 hours

:>

Derek

@Francisco said:

Francisco

Ya, ya, all the good hosts are always sold out or to expensive. Right now I am considering a VPS from Kiloserve.

Damian

@huluwa: ?????

@Derek: It was nice of Newegg to give a $50 discount on that item!

subigo

@subigo said: Or how about hosts just start making entire node stats available to the public? Throw up some sar/iostat reports on a public page and let people get a real idea of how loaded the node is and what to expect before purchasing a vps.

Something like this is what I'm talking about. It just took me two minutes to make public and it's going to give people a much better idea of overall performance than some random dd test on a forum:

http://node6.zensix.com:1111/status/status-report.php

Kairus

@Derek said: :>

Only $2.70/gb!