hi, I need to migrate 40T data and 180M files from one storage device to another one, both source and destination will be NFS and mounted to a local suse linux box.
The first question is that if there is any risk for such a big number of files? should I divide them into groups and rsync them in parallel or in serial? If yes, how many groups is better? The second question is about memory. How much memory should I install to the linux box? The rsync FAQ(http://rsync.samba.org/FAQ.html#4) says one file will use 100 bytes to store relevant information, so 180M files will use about 18G memory. How much memory should be installed totally? And any other thing I could do to reduce the risk? Thanks in advance. Gao, Ming
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