Re: z/VM I/O Concurrency

[David Boyes]

Title: z/VM I/O Concurrency

It’s not VM that limits the I/O traffic, it’s the underlying hardware I/O architecture – z/OS and VSE have the same limitation at the hardware level. That’s why PAV exists – to get around that.   Multiple LPARs…geez. If you have infinite money, sure, go ahead…   David Boyes Sine Nomine Associates From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Raymond Noal Sent: Tuesday, April 25, 2006 2:01 PM To: IBMVM@LISTSERV.UARK.EDU Subject: z/VM I/O Concurrency   Dear List, I was following a topic thread on the IBM-MAIN list server where someone wanted to create multiple Linux LPARs instead of running Linux under z/VM. One respondent stated that z/VM only allows one I/O to a “disk” at a time. Is this really true (Allan??). Does one I/O per disk only apply to mini disks or to attached disks as well? I find it hard to believe that z/VM would be this restrictive. Your thoughts. HITACHI  DATA SYSTEMS Raymond E. Noal Lab Manager, San Diego Facility Office: (858) 537 - 3268 Cell:   (858) 248 - 1172