Open System Services Management and Operations Guide (G06.29+, H06.07+)

Open System Services Monitor
Open System Services Management and Operations Guide—527191-005
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ADD FILESET Command
NORMALIOMODE { UNBUFFEREDCP | DP2BUFFEREDCP | OSSBUFFEREDCP |
DP2BUFFERED | OSSBUFFERED }
specifies the input/output buffering and fault tolerance for application file opens that
do not use the O_SYNC option:
If NORMALIOMODE is not specified, the default behavior is OSSBUFFEREDCP.
REPORT filename3
specifies the Guardian filename for the report file to be generated when FSCK
performs an automatic recovery for this fileset. The file specified must be a
Guardian spooler location.
If this option is omitted, FSCK uses the Guardian filename specified for the
SUBSYS REPORT option.
Considerations
•
The ADD FILESET command applies only to filesets other than the root fileset.
•
The ADD FILESET command can be used only by super-group users (255,nnn).
•
You cannot use the ADD FILESET command on filesets associated with an OSS
name server that is not currently configured.
UNBUFFEREDCP Use unbuffered input/output with checkpointing. This
behavior provides maximum fault tolerance but with
reduced performance.
DP2BUFFEREDCP Use disk-process-buffered input/output with
checkpointing. This behavior provides fault tolerance for
single failures, with better performance than
UNBUFFEREDCP. DP2 buffers file data and checkpoints
the file state to its backup process to ensure recovery
from single failures.
OSSBUFFEREDCP Use OSS-buffered input/output with checkpointing. This
behavior provides fault tolerance for single failures, with
better performance than DP2BUFFEREDCP. OSS
filesystem processes and DP2 share responsibility for
buffering file data; OSS provides the buffering whenever
possible. DP2 checkpoints the file state to its backup
process to ensure recovery from single failures.
DP2BUFFERED Use disk-process-buffered input/output without
checkpointing. This behavior provides no fault tolerance,
but better performance than DPBUFFEREDCP.
OSSBUFFERED Use OSS-buffered input/output without checkpointing.
This behavior provides no fault tolerance, but better
performance than OSSBUFFEREDCP.