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Test the disk I/O of your VPS
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KiloServe KVM:
Hostigation 768 SC:
Hostigation 128 LA:
Go-VPS-Go KVM:
RazorServers Dedi (w. 500GB 7200RPM disk):
VMport Dusseldorf OVZ:
DMBHosting Xen:
TailoredVPS OVZ:
Kiloserve 777mb KVM
Hostigation SC 128mb KVM
Nice and stable. (I ran it twice by mistake)
Hostigation LA 128mb KVM
SecureDragon 128mb Xen
DMBHosting 128mb Xen
HostingInside 1204mb XEN, Los Angeles Based
dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 8.11297 seconds, 132 MB/s
128 OpenVZ SecureDragon
123systems.net ($10/mo 2gig special VPS)
dd if=/dev/zero of=test bs=64k count=16k
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 2.0315 seconds, 529 MB/s
dd if=/dev/zero of=test bs=64k count=16k
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 1.78703 seconds, 601 MB/s
dd if=/dev/zero of=test bs=64k count=16k
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 1.80656 seconds, 594 MB/s
Each test done at 8 hours apart from one another, Very impressed!
@Grinny
Sorry to dissapoint you
dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
O missed that bit
Scoring between 120-300MB/s
Generally around 140 through
On the other hand - 123Systems 128MB $10/year VPS:
Nnnnnnnnnnnnnnnoooooooooooooooooo!!!!!!!!!!!!
@LongShot that's quite normal from my experiences with them.
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 8.97543 seconds, 120 MB/s
CHVPS (Switzerland)
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 21.1553 s, 50.8 MB/s
BuyVM (OpenVZ)
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 7.04698 seconds, 152 MB/s
Hostigation (OpenVZ)
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 15.758 s, 68.1 MB/s
AlienVPS (OpenVZ)
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 4.20551 s, 255 MB/s
CHVPS' I/O is very unstable to say the least. It can go from 50 mb to 80 mb to 1 mb just like that.
New I/O at CHVPS with a little tweaking:
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 11.6683 s, 92.0 MB/s
It's slower than my NC KVM with you with the same command
Amazon EC2 Micro Instance (Singapore):
Nice, I want one of these Amazon instances. Do you know if Amazon accepts debit cards from other countries?
That's how hard drives work when they are shared among multiple users.
I've had a lot of VPSes but I haven't seen one that unstable before :P
It all depends on a lot of factors. One decent MySQL database can cause "unstable" disk I/O, backups can cause "unstable" disk I/O, benchmarks can cause it too. If you're on an unused server then it should remain constant, but if you're sharing the server with people who actually use their VPS then it will definitely fluctuate based on usage. Running a DD test randomly doesn't help much either.
I started caring about the I/O when I saw that it took minutes to log in over SSH. So I looked at what I/O I was getting. It as 1.1 mb/s at the time. So I am hoping it doesn't happen again. Also thanks for a good explanation.
1.1MB/s is pretty much unusable. It does sound like somebody is abusing it if you get that consistently. I would contact them and ask for an explanation or to be moved to a new node.
Actually I did some investigating and found out that the openvz IO scheduler they use does some pretty weird stuff with I/O. If you run something like ioping then a DD test you can get up to 80 mb/s where if you just do a DD test you might get 30 mb/s or so.
Amazon says yes
However, from experience it depends on your bank policy.
I have a VISA debit card and it can't be used for any online purchase, the issuing bank did confirm it doesn't have that "feature" enabled, yet.
Well, Visa Electron is a no no if I can remember, but I've used a master card for all my stuff.
@KuJoe said: That's how hard drives work when they are shared among multiple users.
This is the difference between cheap local storage arrays and optimised shared storage arrays. Typically shared storage arrays can cope with peaks from multiple sources. You may not get the high sequential write performance this test is running but whats the point of fast sequential writes if they drop every time another vps performs any IO intensive task
In my opinion we need to run a better test that replicates typical application load before comparing storage performance
It's a VISA card, not Visa electron, 100% shure
I did find out some more info by investigating a little more at CHVPS. Apparently on the node I'm on (VIP) there are some heavy users through out the day that hammer I/O
It has been better today so I don't have an issue with it right now. I will try to contact them on Monday to see if they will look into it.
@vps6net CH22 Node OpenVZ
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 234.501 seconds, 4.6 MB/s--
@NickP @vps6net
Is that running on a flash drive?