3
Table Of Contents
- Distributed Processing Setup
- Contents
- Introduction to DistributedProcessing
- Getting Started Quickly
- Preparing a Network forDistributed Processing
- The Interfaces
- Creating and AdministeringClusters
- An Overview of Configuring a Cluster
- Configuring Service Nodes and Cluster Controllers
- Creating Clusters with AppleQadministrator
- About QuickClusters
- Advanced Settings in the AppleQmaster Preferences Pane
- Modifying and Deleting Clusters With AppleQadministrator
- Monitoring Cluster Activity
- Accessing Activity Logs
- Setting Cluster Preferences
- Setting Passwords and Scratch Storage
- Recovery and Failure Notification Features
- Command-Line Usage
- Installing AppleQmaster from the Command Line
- Shell Commands for Configuring Service Nodes and Cluster Controllers
- Shell Commands for Submitting Compressor Jobs
- Shell Commands for Submitting AppleQmaster Jobs
- Shell Commands for Monitoring Batches
- Using Scripts to Run AppleQmaster, Compressor, and BatchMonitor
- Troubleshooting
- Index
80 Appendix B Troubleshooting
QuickTime Reference Movies
Strictly speaking, only actual QuickTime movies (not QuickTime reference movies) are
supported for distributed processing. If you submit a reference movie for distributed
processing, make sure media files specified in the reference movie are available to each
node of the Apple Qmaster cluster. In other words, put the media on the shared
(cluster storage) volume.
Cluster Settings for Extended Transcoding Sessions
If you are using Compressor 2 or later for distributed processing, and 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 pane in System Preferences.
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 2 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 will use
/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.