Hi Eric, Could I find a way for two guests in two hosts to communicate? Like qemu starts one vm in Host 1 and qemu also starts a vm in Host 2, the vm can share their memory. Is there some existed way to do that, like remote IPC in qemu?
Thanks for your reply. ---Gary 2014-06-30 17:08 GMT-04:00 Eric Blake <ebl...@redhat.com>: > On 06/30/2014 03:02 PM, Gary Jordan wrote: > > Hi, > > Does Qemu only use the QEMUFile to load the state of VM after migration? > > Normally, yes. Migration must work as a one-way protocol in the common > case when used with default options. > > There is a migration mode that uses RDMA which requires bi-directional > communication in order to speed up aspects of memory migration. But > this mode is transparent to the guest, and requires you to take extra > steps at both source and destination (along with having an infiniband > connection capable of RDMA communication between the two hosts). > > > Is there a way for two vm guests to communicate like two threads or > > processes? > > If there is, it has nothing to do with migration. It sounds like you > are asking about ivshmem and/or virtio; if so, search the archives for > recent discussions on the topic. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > >
