All, After a little more investigation, I found that the 'MigrateCommand' defined its 'executeInSequence' method to return 'FALSE', which seems to make the vm migrations as serial even if the migration requests are dispatched to ha_worker in parallel. You can confirm this in line 56 of '/cloudstack/core/src/com/cloud/agent/api/MigrateCommand.java'
So my question is if there is any reason why the method have been defined to return 'FALSE' always? And do we expect any side effects and/or malfunctioning if we change it to returning 'TRUE'? Any answers/comments will be very appreciated. Thanks Alex Ough On Wed, Sep 18, 2013 at 10:22 AM, Alex Ough <alex.o...@sungard.com> wrote: > I checked the vm migration when their host is set to a maintenance mode > and found that even if the orchestration layer fires the each vm migration > at the same time using a ha_worker thread, the actual migration seems to be > executed serially. > > Is this what we expect? And if so, any chance to make the actual > migrations in parallel? > > Thanks > Alex Ough >
