George Soley wrote:
We've been testing a hipersockets connection between z/OS V1R7 and linux
partitions. After following the setup steps in the Hipersockets Red Book
transmit speeds using ftp or scp have been disappointing. Either our
testing process is incorrect or the configuration is wrong. Does anyone
have experience with this environment?
On a z990-303 with a single IFL and 3 CP's using 56K MTU's. No matter
what I did I could only get 40MB ps using FTP. However, I could get
somewhere between 3-5 FTP streams running concurrently with 40MB ps
each, total of 120-200 MB ps
The IFL was running z/VM (V4 something) with 2GB central and 1GB
expanded. We had two Linux images up and running and each configured
with 2GB of "RAM".
We had 2 z/OS images, one with 2GB central (system programmer sand box)
and one with 8GB central.
All systems were sharing 6 FICON connections to a single DS8100. I have
no clue how the DS8100 was configure or how the DASD was split up. For
all I know I could have been ftp'ing files to/from the same array.
It did not matter what I did:
z/OS to z/OS
Linux to Linux
z/OS client to Linux server
Linux client to z/OS server
We did no tuning either on the z/OS IP stack or the Linux stack.
We were going to go back and look at how the DASD was setup and do some
tuning on z/OS and Linux stacks, but never got to it.
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