Correct way to reboot a node in 7.x cluster while data updates are happening

Hi.. If the cluster with N nodes [at least 10] is getting constant data updates, how can one gracefully reboot a given node[for any maintenance work] that is master+data node?
We do not want to loose any incoming updates during the time given node is rebooted. I did read some docs on this. But it was not quite clear.

Thank you. -V

I figured it out..