Setup guide

decrease the bandwidth available to your Visual Effects and Finishing
application and also contribute to filesystem fragmentation.
NOTE Unlike direct attached storage (DAS), a Storage Area Network (SAN) is
typically designed to handle concurrent usage and will perform better under such
situations.
Configuring Bandwidth Reservation
Stone and Wire provides a mechanism to reserve storage bandwidth for Visual
Effects and Finishing applications and tools that use a local mount point to
a standard filesystem (DAS or SAN) as their media storage. This ensures that
the local application gets the bandwidth it requires and that real-time playback
on the local system is not jeopardized by requests from concurrent processes,
including access from remote hosts.
NOTE Bandwidth reservation policies apply only to I/O requests from Visual Effects
and Finishing applications and tools. They cannot protect your storage bandwidth
from I/O requests coming from third-party processes or user interactions. It is your
responsibility to avoid using third-party tools with the frame storage. See Limiting
Concurrent Usage (page 202).
Bandwidth requests are managed by the Stone and Wire Bandwidth Manager,
based on the parameters in the /usr/discreet/sw/cfg/sw_bwmgr.cfg configuration
file.
When Stone and Wire starts up, the Bandwidth Manager automatically creates
a [Device] section in the configuration file for each partition declared in
/usr/discreet/sw/cfg/stone+wire.cfg. The Manager sets total theoretical read and
write bandwidth values for each device, as well as the default reservation
values.
Adding a New Device to the Bandwidth Manager
Use the instructions in this section if you want additional standard filesystem
mount points (such as mount points to SAN volumes or to any other standard
filesystem volume that is not present in the /usr/discreet/sw/cfg/stone+wire.cfg
file) to be managed by the Bandwidth Manager. You may also use these
instructions as guidelines for understanding and editing the settings in the
predefined [Device] sections of the configuration file.
Visual Effects and Finishing Standard Filesystem Maintenance | 203