Installation and Configuration Guide for Linux® Workstations
Installation and Configuration Guide for Linux® Workstations
Installation and Configuration Guide for Linux® Workstations
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Reserving B<strong>and</strong>width <strong>for</strong> an Application<br />
You may define a b<strong>and</strong>width reservation <strong>for</strong> each Visual Effects <strong>and</strong> Finishing application or tool that uses<br />
a certain partition. By default, a group reservation <strong>for</strong> the major Visual Effects <strong>and</strong> Finishing applications<br />
(Inferno, Flame, Flint, Smoke, <strong>and</strong> Backdraft Con<strong>for</strong>m) running locally is already defined.<br />
Remote applications are identified by application-specific tokens, workstation host name, as well as the user<br />
name under which the application is executed. You can use any or all of these parameters to create detailed<br />
b<strong>and</strong>width reservation rules.<br />
You can also customize the way b<strong>and</strong>width is redistributed in low b<strong>and</strong>width situations. In low b<strong>and</strong>width<br />
situations, instead of reducing all reservations proportionally towards zero, the b<strong>and</strong>width manager first<br />
reduces the b<strong>and</strong>width of each process towards the low-b<strong>and</strong>width value specified <strong>for</strong> that process, <strong>and</strong><br />
attempts to maintain that minimum <strong>for</strong> as long as possible. If the device b<strong>and</strong>width keeps degrading, then<br />
the b<strong>and</strong>width manager starts reducing b<strong>and</strong>width proportionally from the low-b<strong>and</strong>width values towards<br />
zero.<br />
In the following example, low-b<strong>and</strong>width values are not specified in the B<strong>and</strong>width Manager configuration<br />
file. The diagram illustrates the way the B<strong>and</strong>width Manger redistributes device b<strong>and</strong>width in such a case,<br />
as the total available b<strong>and</strong>width decreases from 800 MB/s to 420 MB/s <strong>and</strong> then to 320 MB/s. Note how<br />
b<strong>and</strong>width is proportionally reduced <strong>for</strong> all processes.<br />
62 | Chapter 6 Software configuration
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