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

Managing Filesets
Open System Services Management and Operations Guide—527191-005
5-15
Changing the Operating Parameters of a Fileset
•
Fileset input/output fault-tolerance (FTIOMODE and NORMALIOMODE attributes)
•
Fileset catalog buffering (the BUFFERED attribute)
•
Fileset storage-pool storage-pool file (POOL attribute)
•
Maximum number of files and directories (MAXINODES attribute)
•
User access restriction (the READONLY attribute)
•
Network File System (NFS) request timeout or cache (pool) size
•
Catalog file volume (CATALOG attribute)
•
OSS file system mount point (MNTPOINT attribute)
•
OSS name server identity (NAMESERVER attribute)
To change any of these attributes, use the following procedure:
1. Change the appropriate value in the ZOSSFSET file by using the SCF ALTER
FILESET command.
Changes made to the DESIREDSTATE, FSCKCPU, and REPORT attributes take
effect immediately. Changes made to any other attribute require the following
additional steps before they can take effect.
•
To change any of the AUDITENABLED, BUFFERED, FTIOMODE, MAXINODES,
NORMALIOMODE, POOL, READONLY, or NFS attributes:
2. Apply the change to the fileset using the SCF CONTROL FILESET Command
with the SYNC option.
Changes to FTIOMODE or NORMALIOMODE only apply to files opened after the
new attribute value takes effect; already opened files are not affected.
Changes to any attribute made by the ALTER FILESET command in Step 1 take
effect when the fileset restarts, regardless of whether CONTROL FILESET, SYNC
is used.
•
To change any of the CATALOG, MNTPOINT, or NAMESERVER attributes:
2. If the fileset is started, stop it by using the SCF STOP FILESET command, as
described under Stopping (Unmounting) a Fileset on page 5-13.
3. Restart the fileset using the SCF START FILESET Command.
All changes to these attributes made by the ALTER FILESET command in Step 1
take effect when the fileset restarts.
Changing Fileset Input/Output Fault Tolerance
The value used for the FTIOMODE and NORMALIOMODE options affect application
performance and fault tolerance. Fault tolerance for files opened without using the
O_SYNC bit is controlled by the NORMALIOMODE option setting; fault tolerance for
files opened using the O_SYNC bit is controlled by the FTIOMODE option setting.
The FTIOMODE settings are a subset of the NORMALIOMODE settings. The setting
used for the FTIOMODE attribute of a specific fileset must have a fault-tolerance level
at least as high as that of the NORMALIOMODE attribute setting for the fileset. The