Thank @Animosity022 and @ncw
I saw the log of machine, the root cause is out of memory then kernel kill process of rclone. Please see the following log.
Apr 7 00:05:43 instance-1 kernel: Out of memory: Kill process 25106 (rclone) score 174 or sacrifice child
Apr 7 00:05:43 instance-1 kernel: Killed process 25106 (rclone), UID 1000, total-vm:832112kB, anon-rss:103904kB, file-rss:0kB, shmem-rss:0kB
I tried the command refered to Optimized for low memory/high bandwidth - #8 by mattzab
rclone move gd:movies od:movies -vv --transfers 1 --checkers 1 --use-mmap
It is better and kept running for 14 hours. But it is still out of memory.
Now I will try the following command to see if it will be better or not.
rclone move gd:movies od:movies --transfers 1 --checkers 1 --buffer-size 0