Dear All,

I can transfer file at 2MBps using ftp.I need to increase it to 5MBps,I tried changing following values in /etc/sysctl.conf
# increase TCP max buffer size setable using setsockopt()
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
# increase Linux autotuning TCP buffer limits
# min, default, and max number of bytes to use
# set max to at least 4MB, or higher if you use very high BDP paths
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216


and then executed sysctl -p,

but then too there is no change in the transfer speed.Can anyone please guide me how to increase the ftp transfer speed.I am using vsftp.

With Regrads,
Keerti

Have you checked whether the limit is within the network ? ... where are the client and server located ? .. same lan ? .. over the internet ?

hi kbp,

My client and server are in the same lan.

With regards,
Keerti

Then I would suggest that the path between them has restrictions, are there any firewalls between the two machines ? ... also can you ensure both machines are connected at least at 100 Mb full duplex ?

hi kbp,

no i dont have any firewall between two machines

With regards,
Keerti

How about speed/duplex settings ? ... ( ethtool ethX )

hi kbp,

This is the output of mii-diag command

Using the default interface 'eth0'.
Basic registers of MII PHY #1: 3100 786d 0243 0c54 01e1 4de1 0003 0003.
The autonegotiated capability is 01e0.
The autonegotiated media type is 100baseTx-FD.
Basic mode control register 0x3100: Auto-negotiation enabled.
You have link beat, and everything is working OK.
Your link partner advertised 4de1: Flow-control 100baseTx-FD 100baseTx 10baseT.
End of basic transceiver information.

I have tested ftp transfer without I/O transfer as
ftp> put "|dd if=/dev/zero bs=1M count=100" /dev/null,
I am getting ftp transfer speed upto 37MB/s.

I am accessing the files from pendrive for ftp transfer,
and the output of hdparm -t /dev/sda1 is

hdparm -t /dev/sda1

/dev/sda1:
Timing buffered disk reads: 28 MB in 3.09 seconds = 9.07 MB/sec

so ,accessing pendrive dumping my ftp speed?

With regards,
Keerti

Most likely... try testing the write speed to your pen drive as well, it'll probably be slower than the read performance