For things like rolling restarts, we do:

disablethrift
disablegossip
(...wait for all nodes to see this node go down..)
drain

2011/9/10 Radim Kolar <hsn@sendmail.cz>
what is recommended node stop method. drain or kill Java process? i haven't seen anybody using drain in stop scripts yet

If i kill Java process and log flush time is set to 10 seconds, will be last 10 seconds lost?