I have OVM installed on a HP Microserver N40L, but I haven't been able to obtain good transfer speeds, so I'm trying to find the bottleneck.
I'm getting around 30-40 Mbps on transfers over my local network (everything is Gigabit, read on) on Samba, Nfs and FTP shares alike.
I have been playing around and tweaking for a while, following the advice I could find on forums, but haven't been able to improve the speed.
First of I have two Hitachi 1TB drives on software RAID1. These are working at reasonable speed :
/dev/vdb:
Timing cached reads: 2092 MB in 2.00 seconds = 1045.39 MB/sec
Timing buffered disk reads: 400 MB in 3.02 seconds = 132.64 MB/sec
root@openmediavault:~# hdparm -tT /dev/vdc
/dev/vdc:
Timing cached reads: 1928 MB in 2.00 seconds = 963.62 MB/sec
Timing buffered disk reads: 400 MB in 3.01 seconds = 132.75 MB/sec
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Network cards, modem, cables, everything is ok with Gigabit speed, which I can achieve between my computer and the OVM server with iperf :
root@openmediavault:~# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.1.67 port 5001 connected with 192.168.1.40 port 58598
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.1 sec 132 MBytes 110 Mbits/sec
On the server side, CPU is barely at 30-50% max on transfers, and RAM about 5-10%, so this shouldn't be a problem.
I have tried to tweak the configurations of the various transfer protocols (especially Samba, but also NFS) to obtain better speeds, but I haven't succeed.
Does anybody have a clue of where the bottleneck might be?
Has anyone gotten close to 100Mbps? If yes, which protocol have you used for the shares?
Thanks!
P.S. : The /dev/vdb and /dev/vdc is because I am currently running OVM on a ProxMox virtual machine, but I was getting the same speeds of the test below when I had OVM installed directly on the server. Actually I tried the VM to get better performance, but the speeds look the same on every step of the test I did with both.