General User Release Notes
3.18 Documentation Corrections
With this feature, after the volume is mounted, you can modify the XFC caching
attributes dynamically without dismounting and mounting the volume again.
Use... To...
SET VOLUME V1/CACHE=DATA To Enable XFC caching for the volume V1
SET VOLUME V1/CACHE=NODATA To Disable XFC caching for the volume V1
SET VOLUME V1/CACHE=CLEAR_
DATA
To Clear the contents of the volume V1 from
cache
SET VOLUME
V1/CACHE=(DATA,CLEAR_DATA)
To Enable XFC caching for the volume V1 and
Clear the contents of volume V1 from the cache
SET VOLUME
V1/CACHE=(NODATA,CLEAR_DATA)
To Disable XFC caching for the volume V1 and
Clear the contents of volume V1 from the cache
SHOW MEM/CACHE=(VOL=V1) To display the current XFC caching status of
the volume V1
Examples
1.
$ SET VOLUME $DKA100/CACHE=CLEAR_DATA
This example clears the contents of the volume $DKA100 already present in
the XFC cache. The caching attributes of the volume $DKA100 is not altered.
2.
$ SET VOLUME $DKA100/CACHE=DATA
This example enables XFC caching for the volume $DKA100. The contents of
volume $DKA100 already present in the XFC cache is not affected.
3.
$ SET VOLUME $DKA100/CACHE=(DATA,CLEAR_DATA)
This example enables XFC caching for the volume $DKA100 and clears
contents of the volume $DKA100 already present in the XFC cache.
3.18.5.10 Understanding File System Data Caches
In Section 4.2, add the following bullet after the following paragraph:
XFC improves I/O performance and contains the following features that are not
available with VIOC:
• Dynamically enabling or disabling caching for mounted volumes
3.18.6 HP OpenVMS RTL Library (LIB$) Manual
V8.3
The LIB$SET_SYMBOL value-string is incorrectly documented in Version 8.2 of
the HP OpenVMS RTL Library (LIB$) Manual. The correct value-string is as
follows:
Trailing blanks are not removed from the value string before use. The maximum
length of value-string is 4096 characters. Integer values are not allowed;
LIB$SET_SYMBOL is intended to set string CLI symbols, not integer CLI
symbols.
General User Release Notes 3–17
