A synchronization process occurring between two locations, or a store
and a location, is considered to be WAN-wide (in other words, occurring in a
WAN-environment) if the two locations, or the store and the location, belong to
distinct sites.
For example, assume there is a store with two locations, A and B.
Location A belongs to site A and location B belongs to site B. Any
synchronization that occurs between location A and location B is considered to
be WAN-wide. A synchronization that occurs between the store and location A, or
the store and location B, is also considered to be WAN-wide because the store
belongs to the central site by default.
If compressed synchronization is activated, any WAN-wide FCS
synchronization is compressed. This means that the files exchanged during the
synchronization process are compressed. The FCS server that sends the file
compresses the data (if it is not already compressed), and the FCS server that
receives the file decompresses it. The compression function does not compress
files that are already compressed, as this would cause a performance loss. FCS
determines whether a file is already compressed or not by examining its file
extension.
MQL
provides commands to activate and configure compressed synchronization. For
example, you can configure the list of file extensions that specify whether
files are compressed using
MQL
commands.