Gigabit LAN connection with an average speed of 2,5 MB p/s

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krets
Posts: 5
Joined: 04 Jun 2009, 19:02

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by krets » 05 Jun 2009, 20:42

Sorry, I don't mean to hijack the thread, but I thought my issues were similar, so others would benefit if this was posted to the same thread.

I just received my bubba two yesterday. I am noticing terrible speeds on this system. My bubba is operating much slower than the yooakim's bubba.

I cannot get even get 1MBytes/second with the bubba over the network. Local copies are ok. I've been doing many tests so see where the issue is. I've tried with ftp, cifs, nfs, and scp. I've tried both pushing and pulling.
My network setup is full gigabit, and if I run ethtool it reports just as yooakim's did.

What else can I be looking at?
Here are some examples of the speeds I am seeing:

Code: Select all

### Locally generated file with dd ###
bubba:/home/storage/test# dd if=/dev/zero of=bigfile bs=1M count=1K
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 65.2343 seconds, 16.5 MB/s

### Locally generated file written over cifs ###
bubba:/home/storage/test# dd if=/dev/zero of=/mnt/server1/test bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 355.882 seconds, 295 kB/s

### Pull from cifs server - High variance; it seems I get bursting over a meg a second on occasion ###
bubba:/home/storage/test# dd if=/mnt/server1/test of=blah bs=1M count=1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 17.8742 seconds, 58.7 kB/s
bubba:/home/storage/test# dd if=/mnt/server1/test of=blah bs=1M count=10
10+0 records in
10+0 records out
10485760 bytes (10 MB) copied, 7.25077 seconds, 1.4 MB/s
bubba:/home/storage/test# dd if=/mnt/server1/test of=blah bs=1M count=20
20+0 records in
20+0 records out
20971520 bytes (21 MB) copied, 5213.55 seconds, 4.0 kB/s

### iperf tests between bubba and server ###
bubba:/home/storage/test# iperf -c 192.168.1.145
------------------------------------------------------------
Client connecting to 192.168.1.145, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.1.147 port 34747 connected with 192.168.1.145 port 5001
[  3]  0.0-10.0 sec  37.9 MBytes  31.8 Mbits/sec
bubba:/home/storage/test# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 192.168.1.147 port 5001 connected with 192.168.1.145 port 58424
[  4]  0.0-10.0 sec  40.1 MBytes  33.6 Mbits/sec


### iperf test between my other machines on same switch ###
[root@server1 ~]# iperf -c krets-desktop
------------------------------------------------------------
Client connecting to krets-desktop, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.1.145 port 35765 connected with 192.168.1.143 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.10 GBytes    943 Mbits/sec
[root@server1 ~]# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 192.168.1.145 port 5001 connected with 192.168.1.143 port 3105
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  1.08 GBytes    922 Mbits/sec

krets
Posts: 5
Joined: 04 Jun 2009, 19:02

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by krets » 06 Jun 2009, 21:55

I had rebooted the bubba two before doing the previous tests. I did not notice anything out of the ordinary in the dmesg or logs. I performed another reboot just recently, and I've been getting a sustained 5 megabytes/s when transfering over the network. I would not call it fast, but it's more than 10x faster than what I was seeing previously. This speed also seems to match what others are getting.

I am going to queue up some long transfers. I'll assuredly post again in the next 24 hours if my bubba reverts to poor performance. Otherwise, I'm pleased with the quiet little machine.

johannes
Posts: 1470
Joined: 31 Dec 2006, 07:12
Location: Sweden
Contact:

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by johannes » 07 Jun 2009, 05:56

Yes, this is a strange phenomenon that some users have reported.

Could it be that you did a system upgrade, and did not reboot when getting the poor performance? Since the last upgrade included a kernel upgrade (fixing some performance issues) a reboot was needed for this update to take effect.

Thanks,
/Johannes (Excito co-founder a long time ago, but now I'm just Johannes)

asparak
Posts: 173
Joined: 08 Jun 2009, 07:38

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by asparak » 08 Jun 2009, 07:41

Seeing exactly the same issue on our brand new Bubba Two which arrived on Thursday. Bit of an issue when trying to transfer 600 Gigs of data from our old server.

johannes
Posts: 1470
Joined: 31 Dec 2006, 07:12
Location: Sweden
Contact:

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by johannes » 08 Jun 2009, 08:00

asparak,

Just to confirm, are you running the latest update? Did you reboot your bubba after the upgrade?

Thanks,
/Johannes
/Johannes (Excito co-founder a long time ago, but now I'm just Johannes)

asparak
Posts: 173
Joined: 08 Jun 2009, 07:38

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by asparak » 08 Jun 2009, 08:08

Not yet as we are also seeing the gpg signature issue and I don't want to cancel this transfer as its been running a very long time now.

johannes
Posts: 1470
Joined: 31 Dec 2006, 07:12
Location: Sweden
Contact:

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by johannes » 08 Jun 2009, 08:15

Ok. Please let us know if the issue remains after the upgrade and reboot.

Thanks,
/Johannes
/Johannes (Excito co-founder a long time ago, but now I'm just Johannes)

asparak
Posts: 173
Joined: 08 Jun 2009, 07:38

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by asparak » 08 Jun 2009, 10:39

Hi Johannes,

Having completed the upgrade and rebooted, and re-running some FTP transfers, throughput is now down to 2.5 - 3 MB/s, so half what it was already.

Don't see a reason for it. Wireshark running on the old server isn't showing any unusual activity.

using ncftp to transfer data onto the proftpd on the bubba

Backbone is cat 6a cables

asparak
Posts: 173
Joined: 08 Jun 2009, 07:38

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by asparak » 08 Jun 2009, 16:18

Not sure if its helpful or not for your debug, but 2 parallel transfers via FTP totals around 6 MB/s so it would seem to be a bandwidth throttling somewhere.

A 3rd parallel transfer does not increase the bandwidth beyond @6 MB/s level

The speed would make sense if I was running on a 100Mbit half duplex network, but everything is gigabit or better

krets
Posts: 5
Joined: 04 Jun 2009, 19:02

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by krets » 17 Jun 2009, 01:00

it's been over a week again, and the bubba was running well for about 2 days before the same issue came up. My transfer speed landed in the same place as before. I had to reboot to get everything back to normal.

Is there anything I should look for when it's in this bad state again? I am not sure what's causing it, but I suspect that it will come back again.

krets
Posts: 5
Joined: 04 Jun 2009, 19:02

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by krets » 17 Jun 2009, 01:06

oh, another curious thing; when it is in this bad state, my ssh connection is strange. It seems that the terminal is delayed by a keystroke. It's really strange, If I type "ls" it will only display "l" if I hit enter after the ls, nothing will display. If I hit any key after that (space, esc, enter) the terminal will spit out the results for the ls.

I guess it is hard to describe.

soovizzy
Posts: 19
Joined: 19 Sep 2008, 09:09

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by soovizzy » 27 Jul 2009, 07:47

Just for the record, I have also been suffering for a year now of the very bad performance of the NIC in the bubba two.
As an example if I run Squeezecenter and try and copy a file to the bubba two server the music will stop playing for a while until the copy is done.
Hope you find a solution to this soon or replaces the hardware for those of u swho have theese problems.
At the moment fully upgraded to 1.2 version, no change.

asparak
Posts: 173
Joined: 08 Jun 2009, 07:38

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by asparak » 27 Jul 2009, 08:47

If you are brave enough and want to risk the unstable versions, thats reported to greatly improve the performance.

ubbe
Posts: 40
Joined: 09 May 2009, 01:17

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by ubbe » 28 Jul 2009, 00:15

Hi
same behavior at my bubba2. No transferspeed over 3.5Mb/sec. And im not that brave :oops: But i suppose there will be a solusion soon. Im using bubba2 only as a server if that matters..
Best regards
Ubbe

soovizzy
Posts: 19
Joined: 19 Sep 2008, 09:09

Re: Gigabit LAN connection with an average speed of 2,5 MB p/s

Post by soovizzy » 31 Jul 2009, 02:55

asparak wrote:If you are brave enough and want to risk the unstable versions, thats reported to greatly improve the performance.
asparak wrote:If you are brave enough and want to risk the unstable versions, thats reported to greatly improve the performance.
I will wait for the stable version, hope it doesn´t take too lonng

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