Look-ahead time, Cache-ahead time – Grass Valley iTX System v.2.6 User Manual
Page 351

Using Missing Materials Manager
Look-ahead time
When searching a schedule for events with missing media, Missing Materials Manager "looks
ahead" to a specific point in the schedule. This point is set by the service look-ahead time – a
future period of specified length (e.g. 10 days). Missing Materials Manager checks all schedule
events that have a start time that falls within this period; when it finds an event for which there
is no media file, it adds the event to the missing-materials list.
Files for events that fall within the look-ahead time are not deleted in the auto-purging process.
You set the look-ahead time in the Days Look Ahead box under the Engineering, Channel tab.
Specify the look-ahead time
1.
In the Missing Materials Manager window, select the Engineering, Filtering tab.
2.
Enter the number of days for the length of the look-ahead time in the Days Look Ahead
box.
Cache-ahead time
Where an event in the missing-materials list requires a media file that is on an archive, Missing
Materials Manager can use a Media Watcher that has access to the archive to copy the file to a
Media Store. It does this if the start time of the event falls within the service cache-ahead time
– a future period of specified length (e.g. 10 days), which cannot be greater than the look-
ahead time.
You set the cache-ahead time in the Days Cache Ahead box under the Engineering, Channel
tab.
Specify the cache-ahead time
1.
In the Missing Materials Manager window, select the Engineering, Filtering tab.
2.
Enter the number of days for the length of the cache-ahead time in the Days Cache Ahead
box.
Specifying which live schedules Missing Materials Manager should monitor
By default, Missing Materials Manager checks schedules in all live playout channels for events
with missing media files. You can configure it so that it only monitors selected playout
channels. You may want to do this in a multi-channel system that has multiple instances of
Missing Materials Manager, each one dedicated to its own group of channels.
To select a group of playout channels for monitoring, you use the features in the panel under
the Engineering, Channels tab:
March 2015
System Administrator Guide
Page 351 of 404