TMF Reference Manual (G06.26+)

TMFCOM Commands
HP NonStop TMF Reference Manual—522418-003
3-114
ALTER TMF
TMF State Requirement
You must stop TMF before you can enter the ALTER TMF command with the following
options: CONFIGVOL, ATFORMAT, or TRANSACTIONPROTOCOL. However, you
can enter the ALTER TMF command with the following options at any time, whether or
not TMF is running: SWITCHPROCESS, GOREMOTE, PIOBUFFER,
TMPWAITTIMER.
Usage Guidelines
The ALTER TMF command provides several functions, each selected by a different
command option. In any specific ALTER TMF command, you can specify any one
(and only one) of the options and you must enter a separate command for each option
you wish to set.
Changing the TMF Configuration Volume
With the CONFIGVOL option, the ALTER TMF command causes the TMP process to
change the TMF configuration volume and then stop itself. The new TMP process, re-
created automatically, uses the new configuration volume. If there are no configuration
files located in the ZTMFCONF subvolume on that volume, the TMP creates new ones.
You can restart TMF with a START TMF command.
If the configuration volume becomes inaccessible to the TMFMON2 process, the TMP
fails. To recover from this situation, issue an ALTER TMF command that specifies the
old configuration volume.
Switching the Primary and Backup TMP Process
With the SWITCHPROCESS TMP option, the ALTER TMF command causes the
primary TMP process to pass control to the backup TMP process. Thus, the primary
process becomes the backup, and the backup process becomes the primary.
The SWITCHPROCESS TMP option only takes effect when a backup TMP process
exists.
Changing the Audit-Trail File Format
With the ATFORMAT option, you can change the audit-trail file format from format 1 to
format 2, or from format 2 to format 1. Format 1 and format 2 are disk-partition formats
Caution. Be very careful when entering the ALTER TMF command with the CONFIGVOL
option, because this command makes the previous TMF configuration inaccessible by
changing the configuration volume. Because your TMF configuration is thereafter defined on
the new configuration volume, it is a good precaution to ensure that this volume is a member of
a mirrored disk pair.
To make the previous TMF configuration active again, you must enter another ALTER TMF
command, giving the previous configuration volume name in volume.