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Table Of Contents
QuickTime Reference Movies
If you submit a reference movie for distributed processing, the Apple Qmaster distributed
processing system will automatically copy the appropriate media files to the processing
cluster. For the best performance, you can avoid this file transfer step by making sure
that the media files specified in the reference movie are available to each node of the
Apple Qmaster cluster. For more information, see How the Apple Qmaster System
Distributes Batches and Using Distributed Processing from Final Cut Pro and Motion.
Cluster Settings for Extended Transcoding Sessions
If you anticipate a transcoding session that will last up to seven days or longer, you must
make an adjustment in the Advanced section of the Apple Qmaster preferences pane.
By default, temporary process files may remain on a cluster’s scratch location for seven
days before they are automatically deleted. You can increase this value (the number of
days) in the Apple Qmaster Sharing window of Compressor.
Cleaning Up Cluster Storage
If you are using cluster storage and an error occurs, partial files may be left on the
designated cluster storage location. Check the designated cluster storage location to
make sure no partial media files are left there. If you find partial media files, delete them
and submit the job again.
Using Apple Qmaster with an NFS Server
By default, Apple Qmaster uses /etc/exports to define its Cluster Storage export. This can
cause a conflict if you defined an NFS export in your local NetInfo database. When you
enable a controller using Apple Qmaster 2 or later, Apple Qmaster uses /etc/exports, not
entries defined in your NetInfo database. To work around this issue, either move the
exports to /etc/exports, or move the controller to a computer that doesn’t export anything.
Apple Qmaster Distributed Processing and Xsan
Here are some tips on using the Apple Qmaster distributed processing system with Xsan.
Restarting Apple Qmaster and Xsan
Using previous versions of Apple Qmaster distributed processing on an Xsan may cause
mounting problems when restarting an Apple Qmaster distributed processing cluster
controller.
Restart Apple Qmaster and Xsan computers in the following order
1 Turn off the cluster controller by deselecting “Share this computer” and clicking OK in
the Apple Qmaster Sharing window, opened by choosing Share This Computer from the
Apple Qmaster menu in Compressor.
2 Restart the Apple Qmaster cluster controller computer.
3 Wait for the Xsan volume to mount on the desktop.
396 Appendix B Solving Problems