Apple Shake Qmaster Guide d'installation télécharger pdf (Page 14)

Rather than actually moving segments, Apple Qmaster tells the service nodes which

segments to read via the network, where to find them, and what to do with them. Below

is an example of how one batch could be processed in an Apple Qmaster system.

Batch submitted by

Compressor or

Apple Qmaster (job request

for frames 1–30)

Cluster controller

divides and distributes

job to available

service nodes

Service node 1

Service node 2

Service node 3

Instructions specifying

locations of source files

and frames 11–20

Instructions specifying

locations of source files

and frames 21–30

Instructions specifying

locations of source files

and frames 01–10

Processed file (frames 1-30)

placed in specified

destination

In distributing batches, Apple Qmaster uses the technology built in to Mac OS X to locate

services in a cluster on the same IP subnet and to dynamically share and receive

information. Because the computers can continually transmit their current processing

availability status, Apple Qmaster can distribute (load-balance) the workload evenly across

the cluster.

14 Chapter 1 Distributed Processing Basics

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Apple Shake Qmaster Guide d'installation Page 14