"Edward Ned Harvey (lopser)" wrote: > > I believe these products exist, but I'm having difficulty finding > them. You want to provide HA virtualization... Meaning some VM should > appear to always be up, even if half of the underlying hardware were to > die. At first blush, it would seem impossible ... Even the fastest > network can't possibly keep up with the internal CPU state and memory > of the guest VM. But I would swear, some years ago, I saw or heard > something intelligent ... The host OS is able to quickly snapshot and > diff the guest machine state, so it does this at critical moments, > like, when the guest OS is sending outbound network packets. So you > don't actually need to keep the complete guest machine state in sync > between two machines; you only need to quickly send diffs at critical > moments. Then at any given moment, more than one host hardware can be > hosting the identical internal system state for some guest VM. > > From vmware, the product they call "High Availability" just restarts the > server on other hardware. (As far as I can tell from their tech docs.) > Plus, Vmware doesn't do storage... So you'll have to get your own HA > storage separately.
VMware's "HA" product does as you say. The VMware product that does what you're asking for is "Fault Tolerance". -- Hello World. David Bronder - Systems Architect Segmentation Fault ITS-EI, Univ. of Iowa Core dumped, disk trashed, quota filled, soda warm. david-bron...@uiowa.edu _______________________________________________ Tech mailing list Tech@lists.lopsa.org https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
