Hi! On Thu, Jun 23, 2016 at 9:51 AM, Liron Aravot <lara...@redhat.com> wrote:
> > 3. What hsm.spmSchedule() method does? >> > Schedules a task to be executed as SPM (used to perform operation that > alter > the shared storage or data operations currently). > But SPM is a particular host. What does this method do, if it is called not on SPM host? Returns error? Or somehow transfers the task to the SPM host? > 7. Why in HSM we are using vars.task.getSharedLock(STORAGE, sdUUID) >> sometimes instead of domain lock? >> > The task lock (which uses the resource manager) is used to acquire in > memory logical lock within the current host. > Theoretical example- you wouldn't want to attempt to delete a domain while > you create a volume on it. > But this lock works only inside the host. So, if some other host will try to create a volume, this lock will not help. So what's 11. What methods dom.linkBCImage(imgPath, imgUUID) and > dom.unlinkBCImage(imgUUID) do? > Creates/Removes a symlink to a given image. Where this symlink is located? What is its purpose? > > > > > > 12. What methods dom.activateVolumes(imgUUID, imgVolumes) and > dom.deactivateImage(imgUUID) do? > > Can you be a bit more specific in the question? I don't have much to add > over the method names. I understand that it activates/deactivates volumes. But what does it mean? What is an "active" volume and how does it differ from "inactive"? Shmuel
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