 | | | CIFS client performance | CIFS client performance 2006-01-27 - By Wagner, Chris (GE Infra, Non-GE, US)
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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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