I'm having an interesting problem with hipersockets that I just can't seem to figure out. Here's the lay of the land:
ZOS1 1.4 in LPAR 1 ZOS2 1.4 in LPAR 2 ZVM 4.3 in LPAR 3 SLES8A guest under ZVM1 SLES8B guest under ZVM1 All systems are on a 10.2.32.x/25 network. All are set to use an MTU of 57344 and the real hipersocket is defined with a 64KB frame size. We have a product called FDR/Upstream to do file level backups of our Linux guests. There's an STC that runs in ZOS1 that contacts each Linux guest to do the backups. Nothing real special, but I noticed that performance was REALLY poor, like around 933KB/sec. (Yes, that is KB.) So, I decided to do a little research using FTP. I used a 50MB file and transferred the file in binary to RAM disks on all systems: tmpfs on Linux, tfs on ZOS, and vdisk on ZVM. All transfers were done in non-PASV mode. Here's what I came up with. ZOS2 was only included to show ZOS <-> ZOS rates. It's not normally used by z/VM or zLinux. --> = PUT, <-- = GET ZOS2 --> ZOS1 = ~30MB/sec ZOS2 <-- ZOS1 = ~27MB/sec ZOS1 --> ZOS2 = ~34MB/sec ZOS1 <-- ZOS2 = ~30MB/sec ZVM --> ZOS1 = ~45MB/sec ZVM <-- ZOS1 = ~3MB/sec!!! ZVM --> SLES8A = ~35MB/sec ZVM <-- SLES8A = ~3MB/sec!!! SLES8A --> SLES8B = ~400KB/sec!!!!!! SLES8A <-- SLES8B = ~35MB/sec SLES8A --> ZOS1 = ~56KB/sec!!!!!!!!!!!!!!!!!!!!!!!!!! SLEA8A <-- ZOS1 = anywhere from 6MB to 56MB ZOS1 --> SLES8A = ~90MB/sec (cool!) ZOS1 <-- SLES8A = ~48MB/sec So, can anyone tell me what in blazes is going on? I must have something setup wrong or more folks would be hollarin'. Also, one thing I will be trying shortly is z/VM 4.4 and I was wondering if the new QIOASSIST is available when running on a z/800? I suspect not. Thanks much, Leland CONFIDENTIALITY NOTICE: This e-mail communication and any attachments may contain confidential and privileged information for the use of the designated recipients named above. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
