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2018-03-13iotests: add dirty bitmap postcopy testVladimir Sementsov-Ogievskiy
Test - start two vms (vm_a, vm_b) - in a - do writes from set A - do writes from set B - fix bitmap sha256 - clear bitmap - do writes from set A - start migration - than, in b - wait vm start (postcopy should start) - do writes from set B - check bitmap sha256 The test should verify postcopy migration and then merging with delta (changes in target, during postcopy process). Reduce supported cache modes to only 'none', because with cache on time from source.STOP to target.RESUME is unpredictable and we can fail with timout while waiting for target.RESUME. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-id: 20180313180320.339796-14-vsementsov@virtuozzo.com