[Samba] samba 3.0.26a-1 / Debian/Lenny sendfile(?) performance
problems
Guenter Kukkukk
linux at kukkukk.com
Sun Sep 30 22:35:12 GMT 2007
Am Samstag, 29. September 2007 20:00 schrieb Justin Piszcz:
> Package: samba
> Version: 3.0.26a-1
>
> Kernel: 2.6.22
>
> samba 3.0.26a-1 performance < 900 KiB/s, but FTP = 30-90 MiB/s
>
> Let me start out by saing this is an oddball problem:
>
> SAMBA:
> LINUX -> WINDOWS = < 900 KiB/s (varies between 100 - 900 KiB/s)
> WINDOWS -> LINUX = 30-90 MiB/s (always)
>
> FTP:
> Either direction, 30-90 MiB/s (always)
>
> I do not see any nasty errors in the logs even with verbose = 5.
>
> Any ideas here? I am not using any special options.
>
> # cat /etc/samba/smb.conf
>
> [global]
> log level = 5
> workgroup = WORKGROUP
> server string = %h - Pentium IV 3.4GHZ
> security = user
> encrypt passwords = true
>
> [user]
> comment = user
> path = /home/user
> writable = yes
> valid users = user
> create mask = 644
>
> --
>
> Here, FTP for pulling files from Linux.
>
> ftp> mget *
> 200 TYPE is now 8-bit binary
> 200 PORT command successful
> 150-Connecting to port 1255
> 150 715924.0 kbytes to download
> 226-File successfully transferred
> 226 13.687 seconds (measured here), 51.08 Mbytes per second
> ftp: 733106176 bytes received in 13.69Seconds 53562.23Kbytes/sec.
> 200 PORT command successful
> 150-Connecting to port 1256
> 150 716272.0 kbytes to download
> 226-File successfully transferred
> 226 13.032 seconds (measured here), 53.67 Mbytes per second
> ftp: 733462528 bytes received in 13.05Seconds 56216.95Kbytes/sec.
> 200 PORT command successful
> 150-Connecting to port 1257
> 150 713200.0 kbytes to download
> 226-File successfully transferred
> 226 12.869 seconds (measured here), 54.12 Mbytes per second
> ftp: 730316800 bytes received in 12.88Seconds 56723.63Kbytes/sec.
>
> Here, FTP for pushing files to Linux.
>
> ftp> mput 1 2 3
> 200 PORT command successful
> 150 Connecting to port 1263
> 226-File successfully transferred
> 226 12.802 seconds (measured here), 54.61 Mbytes per second
> ftp: 733106176 bytes sent in 12.80Seconds 57287.35Kbytes/sec.
> 200 PORT command successful
> 150 Connecting to port 1264
> 226-File successfully transferred
> 226 12.949 seconds (measured here), 54.02 Mbytes per second
> ftp: 733462528 bytes sent in 12.95Seconds 56624.92Kbytes/sec.
> 200 PORT command successful
> 150 Connecting to port 1265
> 226-File successfully transferred
> 226 15.400 seconds (measured here), 45.23 Mbytes per second
> ftp: 730316800 bytes sent in 15.38Seconds 47500.28Kbytes/sec.
>
> But (all I can offer is packet dumps/traces or bandwidth measurements):
>
> Incoming: Outgoing:
> Curr: 0.00 MByte/s Curr: 0.07 MByte/s
> Avg: 0.00 MByte/s Avg: 0.07 MByte/s
> Min: 0.00 MByte/s Min: 0.07 MByte/s
> Max: 0.00 MByte/s Max: 0.07 MByte/s
> Ttl: 1898.08 MByte Ttl: 2954.92 MByte
>
> LOCAL <-> REMOTE TXBPS RXBPS TOTALBPS
> (IP) PORT PROTO (IP) PORT TX RX TOTAL
> linuxbox <-> p4w.internal.lan 546k/s 4.74k/s 551k/s
> 192.168.0.1 445 TCP 192.168.0.2 1259 6.88m 106k 6.99m
>
> Why do I get such poor performance when trying to retrieve a file off the Linux box? This is a very strange problem.
>
> Linux:
>
> $ netstat -i
> Kernel Interface table
> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR
> Flg
> eth0 1500 0 14049682 0 0 0 11354070 0 0 0 BMRU
> lo 16436 0 45335 0 0 0 45335 0 0 0 LRU
>
> Windows:
>
> netstat -s
>
> IPv4 Statistics
>
> Packets Received = 5053597
> Received Header Errors = 0
> Received Address Errors = 19
> Datagrams Forwarded = 0
> Unknown Protocols Received = 0
> Received Packets Discarded = 2
> Received Packets Delivered = 5053595
> Output Requests = 3655144
> Routing Discards = 0
> Discarded Output Packets = 0
> Output Packet No Route = 0
> Reassembly Required = 0
> Reassembly Successful = 0
> Reassembly Failures = 0
> Datagrams Successfully Fragmented = 0
> Datagrams Failing Fragmentation = 3
> Fragments Created = 0
>
> ICMPv4 Statistics
>
> Received Sent
> Messages 47 24
> Errors 0 0
> Destination Unreachable 25 2
> Time Exceeded 0 0
> Parameter Problems 0 0
> Source Quenches 0 0
> Redirects 0 0
> Echos 0 22
> Echo Replies 22 0
> Timestamps 0 0
> Timestamp Replies 0 0
> Address Masks 0 0
> Address Mask Replies 0 0
>
> TCP Statistics for IPv4
>
> Active Opens = 204
> Passive Opens = 14
> Failed Connection Attempts = 16
> Reset Connections = 59
> Current Connections = 3
> Segments Received = 5051709
> Segments Sent = 3654327
> Segments Retransmitted = 76
>
> UDP Statistics for IPv4
>
> Datagrams Received = 1826
> No Ports = 58
> Receive Errors = 3
> Datagrams Sent = 716
>
>
> Justin.
>
Hi Justin,
are Realtek GBit network cards (or similar Realtek mainboard chips)
used inside your network?
If so, try using a different netword card - and test again.
If that fixes the performance problem, please report back the
failing card (or chipset), so the kernel developers can have
a closer look.
Cheers, Guenter
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