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Test the disk I/O of your VPS
BuyVM OpenVZ (256/512 MB RAM, 30 GB HDD, 1 TB B/W)
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, 5.78672 s, 186 MB/s
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, 5.93356 s, 181 MB/s
Hostigation KVM (128 MB RAM, 10 GB HDD, 500 GB B/W)
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, 6.29459 s, 171 MB/s
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, 11.1185 s, 96.6 MB/s
eNetSouth OpenVZ (786/1024 MB RAM, 20 GB HDD, 1000 GB B/W)
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, 31.4363 s, 34.2 MB/s
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, 13.1464 s, 81.7 MB/s
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, 13.4436 s, 79.9 MB/s
WhyNOTaVPS OpenVZ (786/1024 MB RAM, 33 GB HDD, 444 GB B/W)
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, 24.3903 s, 44.0 MB/s
This discussion has been closed.
Comments
My MyCpanel Free VPS:
[root@l90 ~]# 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, 20.6291 seconds, 52.0 MB/s
KiloServe 1GB RAM Low End Box special
RapidoVPS 256MB RAM $2.50 month special
not too fast :
dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
A fresh BuyVM OpenVZ-128MB:
hostigation 64 MB
TurnKey Internet
Hetzner
...not so lowendbox but very shity..
@asf, which plan do you have with turnkey? (that's very very slow disk I/O)
@tommy
Some prehistoric wht custom plan
A little over a week later, the same BuyVM OpenVZ-128MB:
Ouch.
Hi Marcel,
Could you log a ticket? It's quite possible there's a bad drive, but we'll need to track it first
Thanks,
Francisco
Chicago VPS 1GB Ram
A fresh Rackspace VPS lol
My buyvm is starting to degrade xD but still the fastest of all my LEBs
Will do. Please don't suspend my account and delete all the backups ;D
Criperz Prodigy 128meg annual:
Oversold much?! Very variable, same test reported 1.9 MB/s a minute later.
BuyVM 256meg:
BuyVM 128meg annual:
QualityServers 128meg annual (from the recent deal):
bHosts 1.5gb:
evorack 128 xen (not as impressive as other but very stable, no complain):
vooserver 128 xen (just like evorack, no complain):
edis 128 kvm (always have great io, I wish they have better billing/support panel):
bitcable 256 kvm (new, for test):
securedragon 96 xen:
BuyVM 128 MB new
CripperZ 64 MB
CripperZ 128 MB
123Systems 192 MB
123Systems 512 MB
SpotVPS 1 GB
Up2VPS 1 GB
IPAPco SuperVPS 4 GB
IPAPco SuperVPS 2GB
Cripperz i/o is very disappointing. Also funny that my cheaper 123Systems one is faster than the more expensive one.
damn buyvm 128 mb, which is the cheapest out of all of them, is smoking everyone else lol
my question is (out of curiosity): what affects disk i/o speed on a vps?
Other clients in the node.
Database trashing
Overselling -> Swapping
Hardware configuration (RAID or not, and what disks)
I'm still wondering why we should use bs=64k for dd test? is this value some kind of standard? if it is, why 64k?
SpotVPS - 256MB
BuyVM - 128MB OpenVZ
FeHosting - 256MB OpenVZ
@circus - it's a reasonable middle grounds for most RAID stripe sizes and if the disk is SSD or mechanical. SSD's can handle say, a 4k block size, where as a mechanical drive won't be able to handle that kind of IOP's without giving really poor results (like 2 - 3MB/sec per disk kinda crap)
Francisco
123Systems - 192MB OpenVZ (Dallas)
123Systems - 256MB OpenVZ(Chicago)
BuyVM - 256MB KVM
1073741824 bytes (1.1 GB) copied, 17.421 seconds, 61.6 MB/s
Fuck this is one of my dedicated servers running in Raid 1 if I remember, it's not very loaded, how can I "fix" this?
How many disks are in the array? just 2?
Francisco
io wise, raid 1 is no different than no raid at all CMIIW and 61 MB/s is normal for sata ^_^ drive
my desktop:
something must be really really wrong
edit: It was only a bad cable, thank god.
That's pretty normal for your typical RAID1 SATA drive dedicated server.
This is why you'll often see VPS hitting 150 and even 250 MB/s disk writes... it's due to the multiple disk spindles. If you look at the tests above, most of us VPS companies use up to 16 hard drives in our RAID arrays compared to your dedicated running 2 drives in RAID1 (mirror).
And nobody even posts read speeds but it's not uncommon to get 1GB/s+ reads on a quality VPS.
A dedicated isn't necessarily faster than a VPS.
Dollar for dollar, every one of our VPS' would whup a dedicated in processing power and disk I/O
@kiloserve: Samsung's SpinPoint F3, WD's Black Caviar and RE4 all write/read above 100 MB/s. A dedicated isn't necessarily faster than a VPS, but you can atleast use all resources, not only burst them.
You won't commonly find the Spinpoints and WD Blacks in dedicated servers.
Most dedicateds use the WD RE3 drives or standard desktop drives which were about 60-70 Mb/s.
Some providers now are using the RE4's.
I'm guessing ztec has an RE3 or older desktop drive and that is about the right speed for those drives.