I'm running a Cent OS server with a NAS storage.
I have heard "rm" command makes overall disk IO slow. So, I gave up doing
rm -R. I will do
rm one by one with a shell script. --EDIT-->
sleep 0.1 one by one slowly.
Before I delete files, I want to change owner with "chown -R" command.
I have about 20,000,000 files to "chown". They are 2 TeraB in total in NAS storage.
I hope "chmod -R" won't affect too much on overall disk IO performance.
How about it? And, how can I measure the performance?