Here is the scenario: On the source server, we added a new disk arrays since the old disk arrays where running out of space. So, I copied the contents from the old disk arrays to the new disk arrays using "cp". Then I unmounted the old disk arrays and mounted the new arrays while preserving the partition names.
On the next day, our rsync process ran and for some reason it did not just copied the incremental / different files but it seems to be going through the whole files and... I am not sure what it is doing, there is huge CPU usage by the process and not a lot of IO usage. So, I guess it is doing some checksum process to compare the data between the source and destination but not copying the files?
Anyway, has anyone seen this rsync behavior before? And what triggered this behavior? Is it because I "cp" the files and therefore the files are different? Is there a file where rsync keeps a list of files that it has scanned before so that it knows it will just copy the incremental files?