Re: [Samba] Miserable read performance (factor ~60 too slow)
Andy, you're a genius. I tried it with a different card (VIA Rhine VT86C100A), and sure enough, it works like a charm. It appears that I am not the only one who has had this problem with the ASUS onboard ethernet controller (Realtek RTL8111/8168B PCI Express Gigabit Ethernet). By now, I have found several other reports with similar problems. I get the feeling the autonegotiation of that chip is broken. I tried putting a switch between the router and the server, but even that does not help. Or maybe there is a bug in the Linux device driver. For the record, here is what ethtool says: /root ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised auto-negotiation: Yes Speed: 100Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on Supports Wake-on: pumbg Wake-on: g Current message level: 0x0033 (51) Link detected: yes Looks normal to me. The router unfortunately does not provide this information, and there is no option for changing the port speed. thanks again for your help. Best Regards, Arno Andrew Morgan wrote: On Thu, 5 Jul 2007, Arno Schäfer wrote: Hi, I am trying to migrate my files from a Windows XP Pro box to a new server running OpenSuSE 10.2/Linux 2.6.18 (x86_64) and Samba 3.0.25b. The Server is a new Athlon 64 X2 4000+/1GB with two 400GB SATA disks in a software RAID1 configuration. The share file system is reiserfs on a 350GB RAID1 partition. I have a small LAN with three PCs on 100MBit Ethernet and a Laptop on WLAN on a 4 Port Switch/WLAN/DSL router. I am experiencing extremely (an I really mean EXTREMELY) bad performance. It is so bad that it can not have anything to do with performance tuning, it must be a configuration error somewhere. Doing some comparisons, I find that - copying a 700MB file from the CIFS share of the Windows XP box to a different Windows PC starts immediately and takes about two minutes. - copying the same file via HTTP from the new Samba server takes a little more than one minute (10.5 MB/sec). - copying the file from the Samba share varies hugely. It can take between 90 seconds and literally hours (!). - sometimes it goes faster, but almost always the startup time is between 20 and 90 seconds, that is the time before the copying even begins. - I have found repeatedly that when I am copying a file from the Samba share, and it goes extremely slow (estimated time 90 minutes), and I start copying a second file (from the same or a different PC), suddenly the copying speeds up to normal speed. ifconfig does not show any collisions or errors, and as I said, copying via HTTP is extremely fast. The Linux installation is as barebones as I could make it, no X11, no firewall (for now), no ZENWorks or AppArmor or anything. I already once reinstalled everything from scratch, to no avail. Any ideas would be immensely appreciated, as I am seriously considering going back to Windows XP ;-) You have an Ethernet duplex mismatch between your server and the switch port. Based on the symptoms you describe, your server is probably at full duplex and the switch port is at half duplex. Andy -- Arno Schäfer IT-Beratung Softwareentwicklung PHP - Java - Web-Anwendungen Linux/Unix - MySQL - Hochverfügbarkeit - Security Hainer Trift 38 - 63303 Dreieich mailto: [EMAIL PROTECTED] Tel. +49-6103-699967 | Mobil +49-171-7939236 -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
Re: [Samba] Miserable read performance (factor ~60 too slow)
I'm curious - do you see an unusually high TCP retransmission rate during these slow transfers? You may need to look on the Server first ... I think the command is something like netstat -s and look in the TCP section. Steve -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
Re: [Samba] Miserable read performance (factor ~60 too slow)
On Thursday 05 July 2007 00:48, Arno Schäfer wrote: - copying a 700MB file from the CIFS share of the Windows XP box to a different Windows PC starts immediately and takes about two minutes. - copying the same file via HTTP from the new Samba server takes a little more than one minute (10.5 MB/sec). - copying the file from the Samba share varies hugely. It can take between 90 seconds and literally hours (!). - sometimes it goes faster, but almost always the startup time is between 20 and 90 seconds, that is the time before the copying even begins. - I have found repeatedly that when I am copying a file from the Samba share, and it goes extremely slow (estimated time 90 minutes), and I start copying a second file (from the same or a different PC), suddenly the copying speeds up to normal speed. Run tcpdump and watch what is going on the wire. This very likely to give more info: you will see retransmits, or data being sent in very small packets, or big spans of nothing being sent... strace -p smbd process pid can also be useful. -- vda -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
Re: [Samba] Miserable read performance (factor ~60 too slow)
Could it be the disk? Can you do a: hdparm -t /dev/sda Then benchmark your XP disk with www.hdtune.com HTH Oliver Arno Schäfer wrote: Hi, I am trying to migrate my files from a Windows XP Pro box to a new server running OpenSuSE 10.2/Linux 2.6.18 (x86_64) and Samba 3.0.25b. The Server is a new Athlon 64 X2 4000+/1GB with two 400GB SATA disks in a software RAID1 configuration. The share file system is reiserfs on a 350GB RAID1 partition. I have a small LAN with three PCs on 100MBit Ethernet and a Laptop on WLAN on a 4 Port Switch/WLAN/DSL router. I am experiencing extremely (an I really mean EXTREMELY) bad performance. It is so bad that it can not have anything to do with performance tuning, it must be a configuration error somewhere. Doing some comparisons, I find that - copying a 700MB file from the CIFS share of the Windows XP box to a different Windows PC starts immediately and takes about two minutes. - copying the same file via HTTP from the new Samba server takes a little more than one minute (10.5 MB/sec). - copying the file from the Samba share varies hugely. It can take between 90 seconds and literally hours (!). - sometimes it goes faster, but almost always the startup time is between 20 and 90 seconds, that is the time before the copying even begins. - I have found repeatedly that when I am copying a file from the Samba share, and it goes extremely slow (estimated time 90 minutes), and I start copying a second file (from the same or a different PC), suddenly the copying speeds up to normal speed. ifconfig does not show any collisions or errors, and as I said, copying via HTTP is extremely fast. The Linux installation is as barebones as I could make it, no X11, no firewall (for now), no ZENWorks or AppArmor or anything. I already once reinstalled everything from scratch, to no avail. Any ideas would be immensely appreciated, as I am seriously considering going back to Windows XP ;-) Best Regards, Arno Here is my smb.conf: [global] workgroup = MSHEIMNETZ printing = cups printcap name = cups printcap cache time = 750 cups options = raw map to guest = Bad User include = /etc/samba/dhcp.conf logon path = \\%L\profiles\.msprofile logon home = \\%L\%U\.9xprofile logon drive = P: usershare allow guests = Yes add machine script = /usr/sbin/useradd -c Machine -d /var/lib/nobody -s /bin/false %m$ domain logons = No domain master = No security = share netbios name = FILESERVER2 [printers] comment = All Printers path = /var/tmp printable = Yes create mask = 0600 browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/drivers write list = @ntadmin root force group = ntadmin create mask = 0664 directory mask = 0775 [share] comment = share path = /share read only = No guest ok = Yes browsable = Yes -- Oliver Schulze L. | http://tinymailto.com/oliver Asuncion - Paraguay | http://www.solojuegos.mobi -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
Re: [Samba] Miserable read performance (factor ~60 too slow)
On Thu, 5 Jul 2007, Arno Schäfer wrote: Hi, I am trying to migrate my files from a Windows XP Pro box to a new server running OpenSuSE 10.2/Linux 2.6.18 (x86_64) and Samba 3.0.25b. The Server is a new Athlon 64 X2 4000+/1GB with two 400GB SATA disks in a software RAID1 configuration. The share file system is reiserfs on a 350GB RAID1 partition. I have a small LAN with three PCs on 100MBit Ethernet and a Laptop on WLAN on a 4 Port Switch/WLAN/DSL router. I am experiencing extremely (an I really mean EXTREMELY) bad performance. It is so bad that it can not have anything to do with performance tuning, it must be a configuration error somewhere. Doing some comparisons, I find that - copying a 700MB file from the CIFS share of the Windows XP box to a different Windows PC starts immediately and takes about two minutes. - copying the same file via HTTP from the new Samba server takes a little more than one minute (10.5 MB/sec). - copying the file from the Samba share varies hugely. It can take between 90 seconds and literally hours (!). - sometimes it goes faster, but almost always the startup time is between 20 and 90 seconds, that is the time before the copying even begins. - I have found repeatedly that when I am copying a file from the Samba share, and it goes extremely slow (estimated time 90 minutes), and I start copying a second file (from the same or a different PC), suddenly the copying speeds up to normal speed. ifconfig does not show any collisions or errors, and as I said, copying via HTTP is extremely fast. The Linux installation is as barebones as I could make it, no X11, no firewall (for now), no ZENWorks or AppArmor or anything. I already once reinstalled everything from scratch, to no avail. Any ideas would be immensely appreciated, as I am seriously considering going back to Windows XP ;-) You have an Ethernet duplex mismatch between your server and the switch port. Based on the symptoms you describe, your server is probably at full duplex and the switch port is at half duplex. Andy-- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
