Setup guide

NOTE The total bandwidth parameters are estimates of the theoretical
maximum bandwidth of the partition. The actual bandwidth is affected
by several factors, including multiple applications trying to concurrently
read or write to it. The Bandwidth Manager continuously measures
partition performance and dynamically maintains the actual total available
bandwidth for each partition.
■ DefaultReservation sets the bandwidth assigned by default to
applications that are denied a reservation request or that don't have
individual or group reservations associated to them. The value is
expressed in megabytes per second. For example:
DefaultReservation=10
3 After setting up all the partition parameters described above, you can
start defining reservations for the current partition. See Reserving
Bandwidth for an Application (page 205).
4 Save and close the configuration file, and restart Stone and Wire by
typing:
/etc/init.d/stone+wire restart
Reserving Bandwidth for an Application
You may define a bandwidth reservation for each Visual Effects and Finishing
application or tool that uses a certain partition. By default, a group reservation
for the major Visual Effects and Finishing applications (Inferno
®
, Flame
®
,
Flint
®
, Smoke
®
, and Backdraft
®
Conform) running locally is already defined.
Remote applications are identified by application-specific tokens, workstation
host name, as well as the user name under which the application is executed.
You can use any or all of these parameters to create detailed bandwidth
reservation rules.
You can also customize the way bandwidth is redistributed in low bandwidth
situations. In low bandwidth situations, instead of reducing all reservations
proportionally towards zero, the bandwidth manager first reduces the
bandwidth of each process towards the low-bandwidth value specified for that
process, and attempts to maintain that minimum for as long as possible. If
the device bandwidth keeps degrading, then the bandwidth manager starts
reducing bandwidth proportionally from the low-bandwidth values towards
zero.
Visual Effects and Finishing Standard Filesystem Maintenance | 205