I've noticed that my FTP upload performance is very poor on RD&T running either z/os 2.1 or z/os 2.2.

Download performance is ranging anywhere from 100 to 1000 KBytes per second depending on the file size.

Upload performance is in and around the 1 to 2 KBytes per second range.  Very slow.  A small file being uploaded can take a minute or two to upload.

Is there some parameters to be tweaked in improving this performance?  It's a bit tough moving stuff from our production LPAR down to the zPDT to play with.

Any input is appreciated.

Thanks.

Performance of z/OS explorer or any programs or features with ZOS ties with No of CPs and how powerful your Linux m/c is. It has nothing to do with zD&T versions. Please check all parameters are still same when you migrated to zD&T 10.0.

I would suggest you to go to section 7.5.9 Performance problems of zPDT Guide and Reference Redbook. I would improve your FTP performance.

Thanks, I will check out that section of the Redbook.

I'm basing my observations on the different OSs running on the same hardware with the same configuration.  The only difference was the latest versions of the zPDT and z/os but there is definitely a wall time difference between various functions of the two different OSs.

After some trial and error, the solution was to add the following for the network adapter...

ethtool -K eth0 gro off

Glad to hear that it's working for you.

Hello.

I have exactly the same kind of performance issue on zPDT using Wifi network interface.

Upload performance is around 1 to 2 KBytes per second range.  Very slow !!!

I do not think that the command "ethtool -K eth0 gro off " can be used on the Wifi interface...

Any help would be appreciated...

Regards

I would review the zPDT Reference Guide here =>  http://www.redbooks.ibm.com/abstracts/sg248205.html?Open

Specifically section 7.6

Ensure appropriate MTU settings between TCPIP on z/OS and the Linux network adapter settings.