kernel zone migration and best practice

Hi,

Just like to clarify below query.

For kernel zone best performance , the recommendation to use dedicated-cpu:cpu instead of ncpu. from this we can use either :cpu or cores there is no difference I believe . Also the understanding is if we use either of this option when we perform cold or live migration the same core sets and cpus number should be available in target server to happen migration ?

Example:

Zone name - tkzone1 , configured with core id 2 .

Zone name - tkzone2 , configured with :cpu 1-10. ( Not ncpu)

When these two zones ( tkzone1 and tkzone2 ) migrate to another global , do we need to have core id 2 and cpu 1 to 10 not in use by any other zone ?