Re: [Engine-devel] Low Level design for HotPlug/HotUnplug feature

On 01/09/2012 11:45 AM, Yaniv Kaul wrote: > On 01/09/2012 11:21 AM, Michael Kublin wrote: >> Hi, the follow link is providing a low level design for >> HotPlug/HotUnplug feature >> :http://www.ovirt.org/wiki/Features/DetailedHotPlug . >> >> The feature is simple and design is short >> >> Regards Michael >> _______________________________________________ >> Engine-devel mailing list >> Engine-devel(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/engine-devel > > 1. Corrected some typos, spelling, backend->engine, 'REST API' -> 'API', > etc. (didn't fix ' storage procedures' - but I think you've meant > 'stored procedures' ?). > 2. Missing/questions: > - Permissions? Quota? > - Explain how disk is created in the first place. > - Database (tables, etc.) > - Which cluster level is required? > - Is it an async or sync task? > - Can you plug a system disk? > - Can you unplug multiple at a time? > - What happens when you plug too many? > - How do you determine where (PCI bus-wise) to plug them? > - Any CanDoAction to allow/disallow plug/unplug from specific systems? > - I suspect we'd be happier with some agent cooperation before > unplugging - is this done by QEMU? Not detailed anywhere. > - Link to KVM/QEMU feature description for it, if such exist, would be > nice. > - Does it affect taking a snapshot? Live or not? > - Does it affect exporting a VM? I reckon you export with all disks, > with their plug/unplug status? In addition: - will you allow it during live migration (qemu allows it)? - Are you expecting events to pop? - You call it 'hotplug' but mention only disk device, what about memory/cpu/ any other pci card? - How do you define a system disk? Some VM may boot from pxe/nfsroot/etc - It should be a nice to have to check if the guest mounts any FS within the disk to be un hot pluged and warn the user

> > Y. > > > > > > > _______________________________________________ > Engine-devel mailing list > Engine-devel(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/engine-devel _______________________________________________ Engine-devel mailing list Engine-devel(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/engine-devel