3390-9 or 3390-27. Doesn't matter. All I/O operations ends when data arrives in large cache memory. I have some 3390-0 volumes and no performance problems.

Carlos Alberto Bodra
S/390 System Programmer
Sao Paulo - Brazil

 


From: VM/ESA and z/VM Discussions [mailto:[EMAIL PROTECTED] On Behalf Of Kurt Nelson
Sent: Tuesday, October 18, 2005 12:31 PM
To: [email protected]
Subject: 3390-9 performance considerations

We're running VM 5.1 with SLES9 and Oracle, currently using SHARK dasd emulating 3390-3. Our dasd folks want to know if we have any problems with the SHARK dasd emulating 3390-9. I believe everything supports that ok, but I'm wondering what perfomance considerations there might be both pro and con to using 3390-9 emulation? I would appreciate any information/experiences that anybody might have.
 
Thank You.


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