We are running Linux guests on an IFL running z/VM

I have two Linux (both SuSE 9) guests defined to the VSWITCH

I have a 684MB file

I use FTP to transfer the file from zLINUX1 to zLINUX2

Results:
1st ftp - 684MB in 2:47 (3.8MB/s)
2nd ftp - 684MB in 1:34 (6.88MB/s)

First question, why is the transfer better on the 2nd ftp of the file?

Then, I attempt the same file transfer from on of my zLinux guests to
an Intel platform Linux server (also SuSE9) on the network (outside of
the IFL).
I use the same 684MB file and use FTP to transfer the file from zLINUX1
to x86Linux

Results:
1st ftp - 684MB in 1:11 (9.17MB/s)
2nd ftp - 684MB in 1:05 (9.96MB/s)

Biggest question, why is the transfer better going out the OSA adapter
on the network?
I certainly thought the transfer between two guests on the VSWITCH
would have at least been equal if not better??

Any suggestions regarding configuration corrections or troubleshooting
are greatly appreciated.

Peggy


Peggy Andrews
Sr. Systems Engineer
Information Technology Department
Technical Support Services Division
City of Sacramento
(916) 808-5438

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