|Both are good options, a new data center in same cluster will work faster as you can stream multiple nodes.|
Or you can add 8 nodes to existing data center and then decommission one node at a time but this is lengthy process including cleanup after decommission.
One node at a time is equally good. If data isn’t much this step can be efficient.
One approach we did was:
RSync a temporary storage volume online
Detach temp storage
Start a new node with new hardware
Rsync to actual storage
Repeat process on each node one at a time
Sent from my iPhone
On Jun 14, 2018, at 4:10 AM, Christian Lorenz <Christian.Lorenz@xxxxxxxxxxxx> wrote: