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List:       linux-cifs-client
Subject:    [linux-cifs-client] CIFS client performance
From:       "Wagner, Chris (GE Infra, Non-GE)" <chris.wagner () ae ! ge ! com>
Date:       2006-01-24 21:20:48
Message-ID: 6A45D5DB0959C148A074B89E4DC760260134E02D () CINMLVEM14 ! e2k ! ad ! ge ! com
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We've been having some CIFS client performance issues.  It takes 4 min 30 secs to \
copy a 42 meg test file. That's only 150KB/sec.  Now if we copy the same file with \
ssh it will take about 1 min 20 secs.  Same file, same machines,  different protocol. \


So we're trying to determine why ssh is different than cifs for copying files, we've \
played with the rsize and wsize a bit and that hasn't helped significantly.  When we \
do packet captures we get a lot of [Unreassembled  Packet (incorrect TCP checksum): \
SMB] and some say this may be a network driver issue however under SSH that does not \
show up at all, it looks really clean in SSH and looks like a spagetti mess in SMB.

Its also only a client issue. The smb server on linux works fine when a Windows \
client attaches to it.  We're running RHEL3 Update 5 64 and 32 bit.  The server is a \
Windows workstation.  When a HPUX system connects to it the transfer is normal.  \
Since it's 2.4 kernel I compiled the CIFS module myself directly against these \
systems.  Any ideas?




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