Instructions Parameter

Reference:        Instructions

This field provides the selection for the transfer instructions being implemented.  There are five choices:

None

The default.  Transfer always occurs.

Add

Transfer if the destination file is missing.

Freshen

Transfer if the destination file exists and is older than the source.

Rollback

Transfer if the destination file exists and is newer than the source.

Synchronize

Transfer if the destination file is missing or is older than the source.

The Synchronize directive does not change anything on the source system.  It synchronizes only in one direction.  A full synchronization would require two transfer commands operating under this instruction.