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Thread: VPS Disk I/O test
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12-07-2010, 07:16 PM #26WHT Addict
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12-07-2010, 08:11 PM #27Web Hosting Master
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12-07-2010, 08:23 PM #28WHT Addict
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12-07-2010, 09:01 PM #29WHT Addict
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I guess my VPS with YardVPS having very inconsistent disk I/O:
Code:# dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync 16384+0 records in 16384+0 records out 268435456 bytes (268 MB) copied, 7.78172 s, 34.5 MB/s # dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync 16384+0 records in 16384+0 records out 268435456 bytes (268 MB) copied, 13.3051 s, 20.2 MB/s # dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync 16384+0 records in 16384+0 records out 268435456 bytes (268 MB) copied, 22.8598 s, 11.7 MB/s # dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync 16384+0 records in 16384+0 records out 268435456 bytes (268 MB) copied, 15.8097 s, 17.0 MB/s
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12-08-2010, 06:20 PM #30Web Hosting Master
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Here's my results for Linode (NJ):
Code:16384+0 records in 16384+0 records out 268435456 bytes (268 MB) copied, 1.16155 s, 231 MB/s
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12-08-2010, 06:34 PM #31Web Hosting Master
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Depending on the plan you sit on the IO priority will be lower if you are on a lower plan. This allow us to control abuse as well as allocate resources to those who pay a bit more. A $15/ USD / year will not get you the highest priority. As you can see your values are quite consistent where you are averaging 20's - 30's. This allows us to ensure high availibility and fight abuse that might occur on our nodes.
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12-08-2010, 08:46 PM #32Web Hosting Master
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I was really interested in trying out VRTServer's Cloud VPS product in comparison to ensCloud's one. VRTServer's cloud product is absolutely awful.
[root@localhost ~]# dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
268435456 bytes (268 MB) copied, 25.4469 seconds, 10.5 MB/s
[root@localhost ~]#
[root@localhost ~]# dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
268435456 bytes (268 MB) copied, 40.7289 seconds, 6.6 MB/s
Probably not even a cloud. Avoid!
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12-09-2010, 06:13 AM #33New Member
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AlienVPS node:ny1; 11:18 a.m. here
#####@#####:~$ dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 record dentro
16384+0 record fuori
1073741824 byte (1,1 GB) copiati, 60,1222 s, 17,9 MB/s
#####@#####:~$
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12-09-2010, 07:01 AM #34Newbie
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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, 102.757 s, 10.4 MB/s
i am waiting for htop 5 sec :-) xsserver.eu
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12-09-2010, 07:10 AM #35Web Hosting Master
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12-09-2010, 07:20 AM #36Newbie
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NL VPS BIZ
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12-09-2010, 07:24 AM #37Newbie
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I am was customer of Delimiter, but Delimiter is dead, and i has to find urgency another vps...
Any way, i think this vps will be not the last of my vps :-)
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12-09-2010, 08:06 AM #38Newbie
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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, 174.422 s, 6.2 MB/s
I think this is my daily extra speed :-)
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12-09-2010, 08:07 AM #39Web Hosting Master
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12-09-2010, 08:23 AM #40Newbie
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No, i have no tried to contact with my provider, becaouse i dont care anymore. I finished with all VPs's. I have already buyed a new machine in hetzner. This is not vps, but a full server, i have now X4 from Hetzner: hetzner.de/en/hosting/produkte_rootserver/x4/
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12-09-2010, 08:28 AM #41Newbie
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I has a vps of delimiter for two years. one month ago Delimiter was gone, or who knows, i lost my customers becaouse my vps was down for many days without any answare from Delimiter, without any response to my tickets. I am bored now, so i needed(i hope i find it) a trusted provider. I hope i find it...
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12-09-2010, 11:56 AM #42WHT Addict
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If i login to my VPS and run
'dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync' will it kill my machine -- i read somewhere someone ran something like this and it overwrote 10GB of his disk!
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12-09-2010, 12:00 PM #43Web Hosting Master
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That's because he ran "dd if=/dev/zero of=/dev/sda bs=1M count=1000"
Notice the "of=/dev/sda" which is his drive. The command you posted is "of=test" which writes a file named "test."
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12-09-2010, 12:07 PM #44WHT Addict
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Ah i see, so the command i posted is safe
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12-09-2010, 03:34 PM #45WHT Addict
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hmm - VPSLatch
root@inkdrop [~]# dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
268435456 bytes (268 MB) copied, 11.9935 seconds, 22.4 MB/s
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12-09-2010, 03:42 PM #46Disabled
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Our nodes have been known to report such issues due with some BIOS/RAID card setting, I believe with write cache, we are already in the works to rectify that. However your sites should not be loading slow at all. Even if we run it on a new node with 0 VMs it would report similar speeds.
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12-09-2010, 04:21 PM #47WHT Addict
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Adam i was neither suggesting the node was poor or that my site was loading slow i was merely posting MY results. I am happy with my VPS and it's loading times...
Happy to hear you are working on a fix though.
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12-10-2010, 12:28 AM #48Newbie
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Hi,
Shouldn't random read or write, like in fio, be used to test disk IO speed instead of dd?
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12-10-2010, 12:45 AM #49Web Hosting Master
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Most RAID controllers are around 150Mbps to 300Mbps sustained read/write like that, so the ~20-30MB/s is just fine and you probably wont get it better than that. The real test will be when you have a full node, if he can still push 25MB/s then there is nothing wrong and you wont be able to fix that unless you remove the RAID card in general. RAID cards that can push more generally cost a lot more ($400+), which most datacenters don't bother to carry unfortunately.
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12-10-2010, 10:57 AM #50New Member
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clubuptime.com just got 1
root@server1:/# dd if=/dev/zero of=test bs=16k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
268435456 bytes (268 MB) copied, 3.14158 s, 85.4 MB/s
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