>>> On Thu, Aug 2, 2007 at 9:22 AM, in message <[EMAIL PROTECTED]>, David Andrews <[EMAIL PROTECTED]> wrote: -snip- > As an option to communicating through an OSA, virtual machines can also > communicate via so-called "hipersockets" -- which are in essence OSA > emulators written in firmware. The TCP/IP stacks on your 130 virtual > machines can communicate among themselves at very high data rates > without actually putting data "on the wire".
This seems to be jumbling up a couple of concepts/facilities. There are real HiperSockets, which provide TCP/IP communication between different LPARs in the same box. That function is provided by the hardware. Then there are the virtualized HiperSockets that z/VM can provide, via a Guest LAN. A Guest LAN can also use virtualized QDIO OSA devices. This is what guests on z/VM would use to "talk amongst themselves." There are other possibilities as well. If each guest was given a real OSA interface, they could communicate via that, since the OSA will transfer packets from one internal interface to another without sending it out of the box. With the advent of VSWITCH, this is now considered "wasteful" and should be avoided. You can even create a VSWITCH that doesn't use any real OSA devices, and get the same result as a Guest LAN. Lots of choices out there. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
