[nova] Auto-convergence but for I/O
Is there any option for disk I/O auto-convergence like conf.libvirt.live_migration_permit_auto_converg for memory-intensive instances? The use case is for an I/O intensive VM, so the disk cannot be migrated. Instead, it is necessary to change the max IO with `$ virsh blkdeviotune` then, migrate the instance and replace the current value with the old using the same command. regards.
not today no. nova does not actuly implemnte auto converge libvirt does we just turn it on if you enable it in the config. i do not think there is a disk io equivelent althoug post-copy migration will help as it will tansiation to the dest host faster and redirect the writes sooner as a result. On 17/05/2025 02:54, Winicius Allan wrote:
Is there any option for disk I/O auto-convergence like conf.libvirt.live_migration_permit_auto_converg for memory-intensive instances?
The use case is for an I/O intensive VM, so the disk cannot be migrated. Instead, it is necessary to change the max IO with
`$ virsh blkdeviotune`
then, migrate the instance and replace the current value with the old using the same command.
regards.
participants (2)
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Sean Mooney
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Winicius Allan