TMF Reference Manual (G06.24+)

TMFCOM Commands
HP NonStop TMF Reference Manual—522418-002
3-83
ALTER PROCESS
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TMP
Description: A TMP process is one of the transaction management process pairs
that coordinates the TMF configuration and distributed transactions. It is in charge
of all operations that require a single point of control, such as starting and stopping
TMF, initiating the recovery processes, and implementing configuration changes. It
manages the data volumes and audit trails, and is the final authority on whether
transactions should be committed or aborted. It also creates other TMF
processes, as needed. Up to two TMP processes (a primary and a backup
process) can run at any time, but never in the same processor.
Process start-up: The TMP process pair is started by TMFMON2 whenever a
processor configured for the TMP is loaded or reloaded. This process pair persists
continuously in the system.
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VOLUMERECOVERY
Description: A volume recovery process recovers the database files to their most
consistent state if they become inconsistent because of a disk volume or system
failure. A volume recovery process runs only when an audited volume must be
recovered. By default, volume recovery processes are dynamically assigned to
one or more processors as needed. You can override the default by adding or
removing processors for this process type.
Process start-up: Volume recovery processes start whenever TMF attempts to
enable a data volume.
When ALTER PROCESS Takes Effect
The ALTER PROCESS command takes effect the next time a process of the type
specified is created. Processes currently running are not affected.
For a new TMP, BACKOUT, or CATALOG process type configuration to take effect, you
manually stop and restart the processes as directed in Table 3-2 on page 3-89.
For the TMFMON process type, only the EXTENDEDSEGSIZE parameter has effect;
this parameter determines the size of the TMFLIB segment in each processor. A
change to this TMFMON process attribute does not take effect until all TMFMON
processes are restarted. However, the only way to stop and restart the TMFMON
processes is to stop and reload all processors. To accomplish this, you can use either
of the following approaches:
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Perform a full system load (cold-load).