#arpnetworks 2011-11-09,Wed

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WhoWhatWhen
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jdoeso, uh, how bad should disk performance on my vps be?
ls takes ~2s to list an empty directory.
dd /dev/zero to a file writes at ~1MB/s.
[12:01]
jpalmerjdoe: ARP is probably one of the best disk I/O vps's I've ever used. So, if you're seeing that kind of issue, email support@ it's likely an abusive client, or a misconfiguration. [12:08]
jdoeit's a stock debian install and the machine is otherwise pretty much idle. [12:09]
jpalmerright. I understand that. but it's possible another client on your VPS is causing a problem. I'd get an email out to support@ so they can investigate. [12:10]
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vcs21,327,698 bytes/sec
on my OpenBSD vm
[12:33]
jdoeI switched from obsd because the performance was abysmal, was hoping pv drivers on linux would help.
apparently that wasn't the issue, or wasn't the only issue.
[12:39]
jpalmerjdoe: did you let ARP know you were switching from BSD to linux? I know there are a couple things they can change to make linux run a little better in the VPS. [12:51]
jdoejpalmer: well I asked them to change the media for me when I did, does that count? ;) [12:52]
jpalmerwell, I'd doubt they went and looked up your old media. so, I think I'd specifically ask them to do any linux optimizations they have. not sure if downtime would be required for it though. [12:52]
vcs21mb/s write is not bad for a VM, especially in a shared environment [12:55]
jpalmervcs: agreed [12:56]
vcsthats odd you would only get 1/s
i would contact support
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arenlorI'm getting 2.5MB/s on kvr05 and 53MB/s on kvr16
I'll bet the lower the kvr number, the lower your write speed.
[14:55]
jlgaddishow are you guys measuring disk speeds?
i'll do it on kvr04 for comparison
[14:58]
arenlorjlgaddis: dd if=/dev/zero of=~/test.txt is what I did.
Just make sure not to let it run for too long, 20 seconds gets you a gig at my better speed.
[14:58]
jlgaddisdidn't specify bs or count or anything? [14:59]
arenlorNope [14:59]
jlgaddisok [14:59]
arenlorJust let the OS run as it wanted to, would give more reliable results I'd assume. [15:00]
jlgaddis93209088 bytes (93 MB) copied, 18.3983 s, 5.1 MB/s
my vps isn't exactly "idle", though, so that's probably not a fair comparison
[15:00]
arenlorNeither is my first one
I'm going to assume that up_the_irons does some type of firewalling, or slowing.
[15:00]
jlgaddisjust ssh, afaik
> 10 syn's per minute to 22/tcp and the ip is blocked for 60 seconds, if memory serves
i know it's something like that... otherwise there's no filtering
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pjsI have my own pf rules.. more than 5 connects in 30 seconds, you're blocked bitch lol [16:01]
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up_the_ironsjlgaddis: you are correct
(about ssh)
no other filtering
[16:14]
RandalSchwartzso happy I don't run ssh on 22 anywhere :)
far less noise in the logs
[16:16]
up_the_ironsyep [16:17]
RandalSchwartzOn one box, I have it on 443
handy when you need to tunnel out of an agressive firewall
use the https proxy instead :)
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twobithackerI use sshguard [16:19]
RandalSchwartzdon't need that if you stay away from 22
there's really no point in putting sshd on 22 these days
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