> SUN also had (not sure if they still do, but I'd > think yes) Dynamic System Domains which are isolated > hard partitions.
Both LDOMs and Dynamic System Domains are hardware features of (some, but not all) hardware systems (of which AFAIK none has both). Those using T1, T2, T2+ (etc) processors can offer LDOMs, because they have CPU support plus firmware that offers hypervisor capabilities. Dynamic System Domains are quite different: they would be on a system with a programmable crossbar switch as a back(or center)plane, and with multiple system boards connected to it. In that case, there would be some sort of more or less intelligent system controller (either a separate workstation back on the E10k, or components running a special purpose OS on the 6x00, or components running Solaris plus SMS software on the E[12]5k, for example) that could program the centerplane crossbar switches to physically divide the frame into separate systems, each with its own system board(s) and I/O board(s). For example, one might put testing and production on the same frame, with more resources for production; and when the version under test was ready to be the new production version, transfer most of the resources (including the I/O boards connecting to the data disks perhaps) to the other domain. I hear that the newer Mx000 series systems made by Fujitsu also have something like Dynamic System Domains, but I've not yet gotten my hands on one of those. -- This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
