What the different between REQUIRED_FILES_LOOKAHEAD and xmdsUpdateInterval

REQUIRED_FILES_LOOKAHEAD determines how far in to the future the
server should send information about files required for layouts and
schedule information.

The default I think is 48 hours (in seconds). So that means any layout
(complete with its associated media) scheduled to run in the next 48
hours is sent to the client in advance along with information about
when that layout should display - such that if the server were to go
offline in that window the client can continue to function without
connection to the server.

xmdsUpdateInterval is the number of seconds the client waits between
connecting to the server to check for updated content.

There is no connection between the two.

Alex