Fujitsu Siemens Computers CentricStor V3.1D, User Manual

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U41117-J-Z125-7-76
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GXCC Function bar
Command buttons along the lower border
OK
Accepts the entry. It becomes effective with “Distribute and Activate”. The “Configu-
ration Changed” symbol (floppy disk symbol) appears in the GXCC main window. The
changed configuration data is stored, even after GXCC has terminated. If the InfoBroker
is restarted or the VLP is shut down without a preceding “Distribute and Activate”, the
data which was changed is lost.
Cancel
Closes the window without accepting the entries. All the entries made since the last time
the window was opened are thus lost.
Reset
All data is reset to the status when the window was opened, even if it affects list entries
that are currently not selected. All the entries made since the last time the window was
opened are thus lost.
Help
Opens a text window containing help information.
Information on the cache management settings
The “Location” function enables individual cache file systems to be reserved for exclusive
use by certain LV groups.
Benefit: This permits cache residence of the logical volumes.
If you have ensured that the volume of data on the volumes which are assigned to a
particular cache file system does not exceed the capacity of the cache file system,
these will never be displayed from the cache. Short access times are then guaranteed
for these volumes.
Rules
– An assignment of cache file system to LV group is defined by a configuration.
– An LV group can be assigned to precisely one cache file system.
– Multiple LV groups can be assigned to a cache file system.
This has the following effects for the cache management:
– Cache file systems to which LV groups are assigned for exclusive use are reserved only
for these LV groups: The mechanisms for distributing logical volumes over the cache file
systems (when creating logical volumes, for load balancing between cache file systems,
etc.) are not used here.
– All other cache file systems are handled as before: The remaining logical volumes are
distributed over all the other caches, and load balancing takes place.