Hello Thomas, I would also appreciate a copy of this PDF. TIA HITACHI DATA SYSTEMS Raymond E. Noal Senior Technical Engineer Office: (408) 970 - 7978 ________________________________
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Patrick Leigh Sent: Friday, October 31, 2008 9:23 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: I/O Overhead - z/VM versus VMWARE Hi Thomas, Could you send me a copy of this pdf presentation? Thanks P On Fri, Oct 31, 2008 at 6:28 AM, Huegel, Thomas <[EMAIL PROTECTED]> wrote: In the Z10-BC web announcement there was a comarison of Z/VM and VMware running LINUX guests. I have the PDF presentation if you want it I can send it to you.. Or it is probably not too difficult to find on IBM's web site. -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] Behalf Of Alan Ackerman Sent: Thursday, October 30, 2008 6:25 PM To: IBMVM@LISTSERV.UARK.EDU Subject: I/O Overhead - z/VM versus VMWARE I got asked: "Does z/VM impose non-insignificant overhead? Is it similar to VMware,= in which virtual I/O imposes significant overhead, but most processor and = memory access runs at close to native physical speed?" I don't know anything about VMWARE so I could not answer the question. = I know that CCW Translation in VM costs significant cycles. I think FCP disks < dedicated DASD < fullpack minidisks < small minidisks= . I would HOPE that the zSeries, with so much of virtualization built into = the hardware, would have lower costs than VMWARE, but I don't really kn= ow. Any takers? Are there any web sites that give performance comparisons VM versus VMWAR= E? Alan Ackerman = Alan (dot) Ackerman (at) Bank of America (dot) com
