On 24/04/2015 04:16, Wen Congyang wrote: >>> >> I think the primary shouldn't do any I/O after failover (and the >>> >> secondary should close the NBD server) so it is probably okay to ignore >>> >> the removal for now. Inserting the filter dynamically is probably >>> >> needed though. >> > >> > Or maybe just enabling/disabling? > Hmm, after failover, the secondary qemu should become primary qemu, but we > don't > know the nbd server's IP/port when we execute the secondary qemu. So we need > to inserting nbd client dynamically after failover.
True, but secondary->primary switch is already not supported in v3. Kevin/Stefan, is there a design document somewhere that covers at least static filters? Paolo
