Hailiang Zhang <zhang.zhanghaili...@huawei.com> wrote: > Hi, > >>> Hmm you don't seem to have replaced this with anything. >>> I think that's a behavioural change; the trick COLO did (I'm not sure if >>> this >>> is still the way it works) is that they initiate the first migration >>> with block migration enabled so that the two hosts (with non-shared storage) >>> get sync'd storage, and then at the completion of that first migration >>> they then switch into the checkpointing mode where they're only >>> doing updates - that's why it gets switched off at this point >>> prior to the 1st checkpoint. >> >> Weird, really. >> >> I did't catch that. >> >> Will investigate. > > Yes, Dave is right, for non-shared disk, we need to enable block > migration for first cycle, > to sync the disks of two sides. After that, qemu will go into COLO > state which we need to > disable block migration.
v2 posted. My understanding is that it maintains the sematic, please test/comment. Thanks, Juan.
