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

Open System Services Monitor
Open System Services Management and Operations Guide—527191-005
12-27
ALTER FILESET Command
The larger the value specified for seconds2, the more likely that a fileset recovery
is needed after a failure, but the faster fileset access becomes because fewer disk
writes occur to update the cache from memory. The smaller the value for
seconds2, the less likely that a fileset recovery is needed after a failure, but the
slower fileset access becomes because more disk writes occur to update the
cache from memory.
Fileset recovery delays subsequent availability of the fileset, so the tradeoff for
slightly faster current access is increased probability of delayed access after a
failure.
•
The MAXINODES value specifies an upper bound on the number of inodes that
can be created in the fileset. It does not guarantee that MAXINODES number of
inodes will be created in the fileset. Specifying a large MAXINODES value
increases the fileset recovery time in the case of an outage. HP recommends that
you specify a MAXINODES value less than or equal to 1000000.
•
FTIOMODE must have a setting equal to or higher than the setting of
NORMALIOMODE. NORMALIOMODE settings are ranked, from highest to lowest:
UNBUFFEREDCP
DP2BUFFEREDCP
OSSBUFFEREDCP
DP2BUFFERED
OSSBUFFERED
•
If an FTIOMODE setting of OSSBUFFEREDCP or a NORMALIOMODE setting of
OSSBUFFEREDCP or OSSBUFFERED is used, the OSS filesystem buffers the
data unless there are file opens from processes in more than one processor and at
least one of the file opens has write permission. In that case, DP2BUFFEREDCP
behavior occurs instead of OSSBUFFEREDCP behavior or DP2BUFFERED
behavior occurs instead of OSSBUFFERED behavior.
Examples
•
To alter the read-write fileset USER1 to be a read-only fileset using the volume
catalog on $DATA1 and the mount point /user1, enter the following command:
ALTER /OUT CMDLOG/ FILESET $ZPMON.USER1, BUFFERED LOG, &
CATALOG $DATA1, &
MNTPOINT "/user1", NAMESERVER #ZPNS1, NFSTIMEOUT 60, &
READONLY TRUE
This command:
°
Sends informational messages to the file CMDLOG.
°
Specifies a buffered write to the PXLOG file whenever a request or transaction
requires a write to the corresponding PXINODE or PXLINK file.
°
Specifies that $DATA contains the catalog files for the fileset.
°
Specifies that /user1 is the mount point for the fileset.