Open System Services Management and Operations Guide (G06.25+, H06.03+)

Managing Filesets
Open System Services Management and Operations Guide—527191-002
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Changing OSS File Caching for the Disks of a
Fileset
Similarly, to enable OSS file caching for a specific disk volume:
1. At a TACL prompt, enter:
SCF
2. At the SCF prompt, enter the following SCF command to stop each fileset involved:
STOP FILESET $ZPMON.filesetname
Enter this command beginning with the last fileset mounted on the affected fileset.
Stop the filesets in the reverse order in which they were last started. Stop the
affected fileset last. If the root fileset is the affected fileset, you can enter:
STOP FILESET $ZPMON.*
This command will stop all filesets in the correct order. This command begins with
the last fileset mounted and stops the filesets in the reverse order in which they
were last started.
3. At an SCF prompt, enter the following set of commands once for each disk volume
in the fileset:
STOP DISK diskname
ALTER DISK diskname, OSSCACHING ON
START DISK diskname
diskname
is the name of a disk volume that contains OSS files.
4. Restart the affected portion of the OSS file system by entering the following SCF
command one or more times:
START FILESET $ZPMON.filesetname
filesetname
is the name of each fileset that you previously stopped, specified in the order in
which mount points occur.
OSS File Caching Overview
By default, the OSS environment provides a file cache for regular files in each
processor that does input or output with a disk volume that contains OSS files. Using
this cache can improve access to regular files.
Enabling or disabling this feature does not affect access from the Guardian
environment to Guardian files (including SQL files) on a volume that contains OSS
regular files.
Caching and Storage Pools
If you disable OSS file caching on a disk volume that is in a fileset, you must disable
OSS file caching on all disk volumes that you want to use for that OSS fileset. You
cannot predict which disk volume in a fileset will be used for a given file; if you have