Please explain DELETE/ERASE and File Locks?

DELETE/ERASE holds the file lock and also holds a lock on the parent directory for the duration of the erasure. This locking can obviously cause an access conflict on either the file or on the directory- it might well pay to rename files into a temporary directory location before issuing the DELETE/ERASE, particularly for large files and/or for systems with multiple overwrite erase patterns in use; for any systems where the DELETE/ERASE erasure operation will take a while. More.

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