CIFS problem slow write performance.

[Jan Rockstedt]

Hi,

We have CIFS problem.

When we transfer archived data (TIF images) we get slow write performance with WAE, read is ok.

Using the version 4.2.3c, no errors in cifs_err.log and both WAE have fully optimzed for source and destination.

Source is IBM ISeries, desination is windows 2003.

Any sugestion for the problem?

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Question from the local it support:
For the transition the Block size is 4 MB. Is this okay?

We can change this.. what is best for the transition (or for the WAAS)

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Regards Jan Rockstedt

[pevaneyn]

Hello Jan,

Could you explain a bit what performace you are seeing and what you were expecting? How fast is the upload without WAAS?

Also: TIFF is a container file format, just like wmv or mov. Do we know what is inside?

Not to point towards the AS/400, but if you do this from a normal Windows machine, do you also see this slow upload?

Best regards, Peter

[Jan Rockstedt]

Hi Peter,

-          At the moment we have appr. 4MB per minute. The line speed is 10Mbit on the edge and 30Mbit on the core site.

-          The data are scanned documents

-          From an Windows machine at edge, to the archiving server at the core, 5MB takes 8 sec..

I can see the it is fully optimized. see below output. I have removed the ip numbers.

ConnID        Source IP:Port          Dest IP:Port            PeerID Accel RR
401377     as400:30748      win2003:139 00:21:5e:57:bb:e8 TCDL  00.0%
402176     as400:10951      win2003:139 00:21:5e:57:bb:e8 TCDL  78.8%
402584     as400:52085      win2003:139 00:21:5e:57:bb:e8 TCDL  75.3%
402597     as400:44326      win2003:139 00:21:5e:57:bb:e8 TCDL  93.6%
393119     as400:63255      win2003:139 00:21:5e:57:bb:e8 TCDL  65.7%

Jan

[pevaneyn]

Hello Jan,

This is one of these problems where "CIFS isn't CIFS".

I'm suspecting that the CIFS code on the AS/400 looks more like OS/2 then Samba or Windows and in the past we have had problems with these clients before (CSCsw94689), so I would suggest that you get captures on both edge and core WAE of the traffic and open a TAC case to investigate exactly what the AS/400 is doing.

Alternatively copy the files from the AS/400 to a windows/unix machine on the remote site and then send it over the WAN.

Best regards, Peter