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Operating Systems AIX I/O speed to CIFS mounted Windows Share Post 302590554 by kah00na on Monday 16th of January 2012 04:30:16 PM
Old 01-16-2012
I/O speed to CIFS mounted Windows Share

I have an AIX box that mounts a Windows share across subnets. When I try to copy a 100 MB file to it, it copies around 2 MB/s. If I copy to another Windows share on the same subnet it copies around 12 MB/s. All I have is gigabit networks so I would expect it to go well over 12 MB/s, which is the theoretical limit for a 100 base T network.

I'm testing by watching "topas" output in one window and doing this in another.

Copying across different subnets:
Code:
# lmktemp afile 100000000
afile
# time cp afile /mnt

real    6m1.49s
user    0m0.10s
sys     0m2.60s
#

Copying on the same subnet:
Code:
# ls -l afile
-rw-r--r--    1 root     system    100000000 Jan 16 00:36 afile
# time cp afile /mnt

real    0m11.67s
user    0m0.04s
sys     0m0.97s
#

Can someone else try this on one of your boxes and see if yours goes any faster? My AIX box is running AIX 7.1 TL1 SP2 and I believe the Windows server is running 2008.
 

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AFILE(1)						      General Commands Manual							  AFILE(1)

NAME
afile - display type and creator of Apple Macintosh files (netatalk format) SYNOPSIS
afile [ -a ] file ... DESCRIPTION
afile displays the name and Macintosh type and creator of the file arguments. Tests whether the file is an AppleDouble header, in which case it checks the corresponding data fork exists, or assumes it is a data fork in which case it looks for the corresponding AppleDouble to find the type/creator information. afile does not look at any of the extension mapping files such as AppleVolumes.system. OPTIONS
-a Include directories and data files of unknown type (i.e. without corresponding AppleDouble) in output. DIAGNOSTICS
returns exit status 0 if all files have a corresponding valid .AppleDouble header or data fork, or 99 for bad command line options. Other- wise it returns the following error code relating to the last invalid file. 1 file doesn't exist 2 file is unreadable 3 file is directory 4 file is AppleDouble without data fork 5 file is AppleDouble with unreadable data fork 6 file is data fork without AppleDouble 7 file is data fork with unreadable AppleDouble 8 file is data fork with short AppleDouble 9 bad magic in AppleDouble SEE ALSO
achfile(1), afpd(1) 26 Feb 1998 AFILE(1)
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