As shown in the File Compression section, the Graphics Plugin predicts what the NLE system will ask for next and requests those frames and fields from the renderer in advance. Although it is possible to disable this feature, safe mode would then be required, as described earlier, and safe mode is only for use if there are problems with pre-fetching.

When fine-tuning the performance, the question is how aggressive the pre-fetching should be. Current releases use more aggressive pre-fetching than earlier, so it's essential to configure how many fields to pre-fetch, that is, how many graphics requests should be on the network from one client at any given moment. It's also possible to ask the system to pre-fetch the whole clip, which would probably provide adequate performance; however, this will block the Viz Engine for other users who want to edit their effects, scrub the timeline or render. In general, the default setting of pre-fetching 20 fields is a good compromise, although the setup might require a different value (between 5 and 30 are acceptable values).

See Also

• File Compression