Hi there, I've got similar problem as Fabien. The configuration is as follows:
server: 2x Intel Pentium III @ 1GHz 1GB RAM Compaq SmartArray 431 RAID controller Seagate Medalist 3.2GB - system disk 2x Seagate Cheetah, 18GB, 15k RPM in RAID 0 - Samba share Intel 82540EM GbE NIC client: Compaq NC6220 laptop Intel Pentium M @ 1.73GHz 512MB RAM Fujitsu 40MB ATA Broadcom BCM5751M GbE NIC switch: Dlink DGS-1005D 5-port, unmanaged GbE switch Both computers run Gentoo Linux 2008, kernel 2.6.25-r9, server runs Samba 3.0.33, client mount.cifs 3.0.30. The underlying filesystem for Samba is Ext3 with xattr and acls. I wasn't able to break 32MB/s (250Mbps) transfer speed neither reading nor writing to the server. The disk subsystem of the server is capable of 60MB/s and generaly the hardware is not the bottleneck. Neither is the network - the bw_tcp from LMbench suite shows around 108MB/s with 1500b messages, which is what I would expect from GbE & TCP/IP. I've been tinkering with very much all the knobs the linux's TCP/IP stack has, the same goes for smb.conf - to no avail. The only thing I couldn't test are Jumbo frames, because the BCM5751M doesn't support them. Unfortunately I can't post my smb.conf, as I am off today, but I can post it later. However, I have find out that having several reads (or writes) pending increases the transfer speed up to 108MB/s, which proves that the hardware is not the bottleneck: I've created a 500MB file on the server and as it fits into the buffer cache the disk subsystem's limits are eliminated. Then I opened it ten times with 'dd if=/mnt/samba/examplefile of=/dev/null &' and this way I was able to saturate the GbE network. But I would like to read and write to Samba close to the hw speed within one tcp session. I was not able to manage that and after some googling on the Internet I've found out that I'm not the only one suffering from this issue. Does Samba scale to gigabit speed within one opened tcp session? Limitition of SMB protocol? Or is it linux TCP/IP stack issue? Any suggestions? Thank you in advance Ales Blaha -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba