[Samba] Copying (Samba -> WinXP SP2) MATLAB generated .jpg files very slow.

[Paul Griffith]

Greetings,
This is a interesting problem. One of our researchers uses MATLAB to  
generate jpg files as part of his vision research. When he copies these  
files from the file server, it is very slow. I tried 3.0.28a and I see the  
same problem as we have with 3.0.28.

Here are some interesting stats.

1) MATLAB generated files:
command: robocopy Y:\23_1 C:\23_1 /e
dirs: 2
files: 262
bytes: 12.75MB
time: 3min 15 seconds


2) Same files resaved with IfranView
command: robocopy Y:\23_1b C:\23_1b /e
dirs: 2
files: 260
bytes: 22.05MB
time: 19 seconds

This is only a subset of the files that the user copies. The full  
directory consists of 8939 files over 101 directories for a total of 402MB  
and this takes 1 Hr,12 minutes and 5 seconds (Samba 3.0.28 -> WinXP SP2)  
verses 3 minutes 30 seconds for a WinXP SP2 -> WinXP SP2 copy.

When I write the files back to the same Samba server the results are about  
the same for the MATLAB and IfranView jpg files.

Any suggestions, since this only happens with MATLAB generated files?


Thanks

======

/xsys/pkg/samba-3.0.28/sbin/smbd -b
Build environment:
   Built by:    [EMAIL PROTECTED]
   Built on:    Tue Dec 11 09:46:16 EST 2007
   Built using: gcc
   Build host:  Linux navy 2.6.9-55.0.2.EL.CSE.smp #1 SMP Wed Jul 11  
09:50:28 EDT 2007 i686 i686 i386 GNU/Linux
   SRCDIR:      /tmp/xsys.8289.0/samba-3.0.28/source
   BUILDDIR:    /tmp/xsys.8289.0/samba-3.0.28/source

Paths:
   SBINDIR: /xsys/pkg/samba-3.0.28/sbin
   BINDIR: /xsys/pkg/samba-3.0.28/bin
   SWATDIR: /xsys/pkg/samba-3.0.28/swat
   CONFIGFILE: /xconf/samba/smb.conf
   LOGFILEBASE: /var/log
   LMHOSTSFILE: /xconf/samba/lmhosts
   LIBDIR: /xsys/pkg/samba-3.0.28/lib
   SHLIBEXT: so
   LOCKDIR: /var/samba/locks
   PIDDIR: /var/run
   SMB_PASSWD_FILE: /var/samba/private/smbpasswd
   PRIVATE_DIR: /var/samba/private
====

[global]
        workgroup = CSYORKUCA
        netbios name = PCSERVER
        netbios aliases = SILVER
        server string = CS Samba %v Server
        interfaces =
        bind interfaces only = Yes
        passdb backend = pdb_udb
        username map = /xconf/samba/usermap
        client NTLMv2 auth = Yes
        client lanman auth = No
        client plaintext auth = No
        log level = 2
        syslog = 0
        max log size = 0
        debug uid = Yes
        smb ports = 139
        deadtime = 15
        hostname lookups = Yes
        printcap name = /xconf/lprng/printcap
        logon script = default.bat
        logon path =
        logon home =
        domain logons = Yes
        os level = 65
        preferred master = Yes
        domain master = Yes
        wins support = Yes
        invalid users = root
        inherit permissions = Yes
        hosts allow =
        print command = /xsys/bin/lpr -b -P%p %s ; rm -f %s
        lpq command = /xsys/bin/lpq -P%p
        lprm command = /xsys/bin/lprm -P%p %j
        use client driver = Yes
        oplocks = No
        level2 oplocks = No

[netlogon]
        path = /xconf/samba/netlogon

[homes]
        comment = Home Directories
        valid users = %S
        read only = No
        csc policy = disable

[printers]
        comment = All Printers
        path = /tmp
        create mask = 0700
        printable = Yes
        browseable = No


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