Working with a Cache System:
Two different modes are available
when a component (V4 model, V5 CATPart, V5 CATProduct, etc.) is inserted
into a DMU Navigator CATProduct document:
- Design mode: in this mode, the exact geometry is available and the
document is inserted as is.
- Visualization mode: in this mode, a representation of the geometry
only is available and the corresponding cgr file, if it exists, is
inserted from the cache system.
Using a cache system considerably reduces the time required to load your
The cache system is organized into two parts:
- Local cache: a read/write directory located on your
machine or on the network and used to store cgr files.
The first time a component is inserted, it is tessellated. This means
that the corresponding cgr file is computed and saved in the local cache
as well as displayed in the document window. The next time this component
is required, the cgr file which already exists (and not the original
document) is automatically loaded from the local cache. The user is
normally responsible for the local cache.
- Released cache: a read-only cache which is not
necessarily located locally on your machine.
Several directories can be defined for the released cache. If the cgr
file cannot be found in the local cache, the DMU Navigator browses
released directories in the order listed to check whether it is located
in one of them. If it is still not found, the component is tessellated
and saved in the local cache. The site administrator is normally
responsible for the released cache.
Reading Components from a Database: The cache system works in exactly
the same way when components inserted into a CATProduct document come from
a database. An additional check is run: if the cgr file is not found in the
local or released caches, the DMU Navigator requests that, if the cgr file
exists in the database, it be downloaded.
For more information, see the Infrastructure User's Guide,