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OVH slow networking help needed
I have been using a budget Kimsufi server for years (i5-3570S). It's been an absolutely amazing server, running a production website on it, it is working well, only the database is getting kind of slow because it has a HDD.
This year, I finally upgraded to an SSD based server at Black Friday, a SoYouStart E3-SSD-1-32 Server (Xeon E3-1245v2 (4c/8th) - 32GB DDR3 1333 MHz - SoftRaid 2x480GB SSD).
This would be a perfect server for me, except for the absolutely terrible international network speed. While the 100 mbps Kimsufi server can do 80-95 mbps reliably at any time, the new 250 mbps SYS server can iperf 5-15 mbps to OVH France. The same test to Canada always goes to 800+ mbps.
I've been back-and-forth with Support, my email thread is at 30+ replies, just now, they've replaced the physical network cable, to no change whatsoever.
At the very same Black Friday deal, an other LET user @emilio911 bought a server exactly like mine, and he is suffering from the very same problem.
If you have a server in BHS, can you help by running iperf -c iperf.ovh.net -r
and posting your results, along with what datacenter you are in? Mine and @emilio911's server is both in BHS1.
Here is a test result for mine, server in BHS1:
iperf -c iperf.ovh.net -r
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to iperf.ovh.net, TCP port 5001
TCP window size: 45.0 KByte (default)
------------------------------------------------------------
[ 5] local 192.95.29.x port 41780 connected with 188.165.12.136 port 5001
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-10.0 sec 153 MBytes 128 Mbits/sec
[ 4] local 192.95.29.x port 5001 connected with 188.165.12.136 port 50978
[ 4] 0.0-10.3 sec 6.38 MBytes 5.18 Mbits/sec
Comments
root@sv39 ~ # iperf -c iperf.ovh.net -r
bind failed: Address already in use
Client connecting to iperf.ovh.net, TCP port 5001
TCP window size: 85.0 KByte (default)
[ 4] local 176.9.125.211 port 47152 connected with 188.165.12.136 port 5001
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.0 sec 1.09 GBytes 932 Mbits/sec
root@sv39 ~ #
Indeed, iperf from BHS to OVH France (on SYS E3) gets 25Mbps for me, however to all other networks overseas it is perfectly fine, iperf to Online.net maxes the port.
Had that problem as well on some of my kimsufis. After 3 months of ticket ping-pong they finally fixed something on their end and the speeds went up.
I see, so this is kind of usual then.
On the other hand, I might not be understanding the iperf values right. Is the first value (128 mbps in my case) is the upload value for the server? And the small value (6.36 mbps) is the download one? That is, in case my server is a normal webserver, I don't need to worry so much about the second value?
The 2nd value is actually the one you should be worried about.
@MikeA what did you use to iperf to Online.net?
iperf3 -c ping-ams1.online.net -p 5209 -R
does 25 mbps to me.
iperf3 -c ping.online.net -p 5209 -R
does 40-60 mbps.
@zsero In their last ping-pong reply with me they told me that "BHS1 has an older configuration". I'll keep you updated...
I tried it on my home cable connection which is 150 down / 10 up. The first value is 10 and the second one is 150. With iperf3, the normal one is 10 and the -R one is 150.
While the first value is the amount of data, the second one is the actual speed.
I was thinking about the two lines when using
-r
. For me the first line is OK, but the second line is really slow.Their main one, ping.online.net, got 270Mbps on my 250Mbps server.
Ah ok.
Well both are too slow imho.
I see, so these speeds are definitely not normal on OVH BHS. I'll see how it goes, like what is the next step after changing a network cable.
Sorry to plug in, and perhaps it is related, but those with a OVH server in France, even better if in RBX, what speeds are you getting with single threaded download from NL?
I got this server only recently, but I remember servers I got 2+ years ago to approach 1G speed with single threaded download.
iperf3:
-R
means test download, without-R
you're testing upload (note that the-R
is uppercase).I would also recommend using
-P 8
as well to increase the amount of connections iperf can simultaneously use.Maybe so many people are connecting to
iperf -c iperf.ovh.net -r
it exploded and then imploded.Easy to get 1GBit from iperf.ovh.net using a Hetzner dedi.
If you don't get 1GBit even from OVH there is something wromg.
EDIT:
Inserted typo.
Yes, that server is not overloaded, I can always get 2+ Gbps from iperf.ovh.net via Google VPS-es.
You are right, but in my case the problem is mostly visible via single threaded performance. Having said that, I can get 35 mbps via -P 5, so even parallel 5 doesn't help much.
I thought I'd update you on how this issue is going on. At around 1st of January, the OVH team finally acknowledged that there is indeed a problem with < 10 Mbit/sec download speeds, and their administrators requested control over the server.
I asked them regularly, every week that what is the status of this issue, and they always replied that they are indeed working on it. I even asked if they are sure I should renew the server, because it's kind of silly that I'm renewing a server which I couldn't have used till now, and they said that yes, I should just renew it, RMA will cover the missing days.
Today, I'm at day 74 of buying this server, until this time I couldn't use it at all (and paid for it). I asked again, and they replied that they see everything is ok, I should apply the following sysctl tweaks (net.ipv4.tcp_rmem, etc). No, some sysctl tweaks won't make my 10 Mbit/sec download speeds into the advertised 250 Mbit/sec (Just for reference, a North American Google Cloud server can do 300 Mbit/sec to OVH France via the same iperf command).
At this point I'm questioning if I'll ever want to use OVH/SoYouStart for business purposes.
@emilio911 had the exact same problem, at least for him they allowed to move to a BHS6 server for the same price. So far I wasn't so lucky.
Now, if I'd need to look for an alternative provider, can you help me in the following:
38% of my users are from North America, 33% are from Europe, 10% from South America?
Should I just pick Hetzner and forget this mess?
Just for reference, here is how the server functions after 74 days of emailing about this issue:
That is 25 Mbit/sec downloading on 4 parallel threads, right now! The test didn't even complete for some reason.
Did you try a different remote machine also?
Yes, everything overseas is super slow, but they said they don't guarantee anything related to network. So I found out that I can "prove" the slowness by using their own OVH France server. BTW, OVH France does 1200/500 from Hetzner and OVH Canada does 1000/500 mbit/sec from Hetzner Nuremberg.
Hetzner.
EDIT2:
Hetzner is the answer.
What's the question?
No question anymore. Bought an EX42-NVMe, stable iperf 600/360 to USA (iperf.he.net), and this SSD. And for some reason it geekbenches like a 6700K:
Happy ending.
And thanks for teaching me about iperf.he.net.
You must remember though that HE has congestion issues with many networks.
Typical response that i expect from you 😂
The informative one, yes, thanks. That’s what I aim for.