we want migrate our data from regular drives on production server to new SSD drives. how we can do that without taking down the node no longer than 4 hours(hinted hand-off is 4 hours) our data is in few hundreds of GigaBytes.
what i was thinking is stoping cassandra on one node at a time flushing data to disks and then transfering data from old drives to new drives and de-mounting old disk and bringing back node online. Is this a right approach ?? If so what is my major concern is,the data migration to new disk takes more than 4 hours in the mean while i will lose hints.
Is there any better approach for migration of data to new disks??