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Gigabit network slow samba, ftp, iperf?
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I'm having many little problems with my gigabit network.
My hard drive reads at 85 MB/s, so why am I downloading from the ftp server at 68 MB/s? How could I diagnose what is eating those 17 MB/s?
Why does my windows machine have a slow 326 Mbit/s transmit speed compared with ubuntu's transmit speed of 763 Mbit/s when testing with iperf?
Why do I get slow samba speeds?
Windows is connected to Ubuntu with a 6 foot crossover cable. Both machines are fully updated.
windows xp3
motherboard: gigabit ga-965p-ds3
cpu: C2D E4400
hard drives: 250gb seagate, read = 85 MB/s
lan: marvel 8053 Gigabit LAN (onboard, PCI-E)
ubuntu 8.04 gateway
motherboard: Asus P5B-MX
cpu: C2D E2160
hard drive: 250gb seagate, read = 85 MB/s
lan: attansic® L1 PCI-E Gigabit LAN controller (onboard, PCI-E)
iperf
ftp
Samba
smb.conf
My hard drive reads at 85 MB/s, so why am I downloading from the ftp server at 68 MB/s? How could I diagnose what is eating those 17 MB/s?
Why does my windows machine have a slow 326 Mbit/s transmit speed compared with ubuntu's transmit speed of 763 Mbit/s when testing with iperf?
Why do I get slow samba speeds?
Windows is connected to Ubuntu with a 6 foot crossover cable. Both machines are fully updated.
windows xp3
motherboard: gigabit ga-965p-ds3
cpu: C2D E4400
hard drives: 250gb seagate, read = 85 MB/s
lan: marvel 8053 Gigabit LAN (onboard, PCI-E)
ubuntu 8.04 gateway
motherboard: Asus P5B-MX
cpu: C2D E2160
hard drive: 250gb seagate, read = 85 MB/s
lan: attansic® L1 PCI-E Gigabit LAN controller (onboard, PCI-E)
iperf
- windows pc downloading from gateway: 763 Mbit/s = 95 MB/s
- gateway downloading from windows pc: 326 Mbit/s = 41 MB/s
ftp
- windows pc downloading from gateway: 544 Mbit/s = 68 MB/s
Samba
- windows pc downloading from gateway: 194 MBit/s = 24 MB/s
- gateway downloading from windows pc: 160 MBit/s = 20 MB/s
smb.conf
[global]
netbios name = SHWICK_GATEWAY
server string = SHWICK_GATEWAY
interfaces = lo, eth1
bind interfaces only = Yes
map to guest = Bad User
passdb backend = tdbsam
syslog only = Yes
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192 SO_SNDBUF=8192
os level = 65
preferred master = Yes
domain master = Yes
dns proxy = No
wins support = Yes
invalid users = root
[Media]
path = /home/ftp/
create mask = 0640
directory mask = 0750
guest only = Yes
guest ok = Yes
What category is the crossover cable
They both got gigabit cards?
They both got gigabit cards?
If i am helpful, please give me reputation points.
Yes both onbaord gigabit cards. Crossover is CAT5.
So I found how to make samba faster, I removed "SO_RCVBUF=8192 SO_SNDBUF=8192" from socket options. I let the tcp stack set the buffer size automatically now. 8192 was too small for a gigabit lan.
But is there any way I can improve the ftp speeds? The problem is server side, as I tested a download on both windows and from an ubuntu livecd, and both times it was 68 MB/s.
So I found how to make samba faster, I removed "SO_RCVBUF=8192 SO_SNDBUF=8192" from socket options. I let the tcp stack set the buffer size automatically now. 8192 was too small for a gigabit lan.
But is there any way I can improve the ftp speeds? The problem is server side, as I tested a download on both windows and from an ubuntu livecd, and both times it was 68 MB/s.
You should really be using cat6 cable on a gigabit LAN
giabit cards dont need crossover cables anyway, a patch is fine
giabit cards dont need crossover cables anyway, a patch is fine
If i am helpful, please give me reputation points.
Well I give up I guess I'll settle for 68 MB/s ftp and 43 MB/s samba. lame.
I tried a bunch of tcp tweaking on my ubuntu gateway, stuff from articles like
Tried setting mtu to 9000, tried disabling tcp sack. Double checked cables were cat5e. (cat5e supports gigabit)
Booted ubuntu livecd on windows machine, iperf got 940 Mbit/s down. And I get 544 Mbit/s from ftp server.
Tried messing with nfs, looked like i was getting 62 MB/s down. Couldn't do proper tests b/c livecd boot kept running out of space.
Whatever. Getting that last 17 MB/s isn't worth it if it's this difficult.
I tried a bunch of tcp tweaking on my ubuntu gateway, stuff from articles like
# TCP gigabit tweaks net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216
Tried setting mtu to 9000, tried disabling tcp sack. Double checked cables were cat5e. (cat5e supports gigabit)
Booted ubuntu livecd on windows machine, iperf got 940 Mbit/s down. And I get 544 Mbit/s from ftp server.
Tried messing with nfs, looked like i was getting 62 MB/s down. Couldn't do proper tests b/c livecd boot kept running out of space.
Whatever. Getting that last 17 MB/s isn't worth it if it's this difficult.
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