TS/MP System Management Manual (H06.05+, J06.03+)

Starting and Stopping SERVER Objects
HP NonStop TS/MP System Management Manual—541819-007
4-4
Freezing and Thawing Server Classes
Freezing and Thawing Server Classes
To disable communication between link managers and server processes without
actually stopping the server class, use the FREEZE SERVER command. The
FREEZE SERVER command prevents link managers from sending requests to the
server processes.
For example, this command freezes all server processes in the server class SALES:
= FREEZE SERVER SALES
If no server process in the server class has incomplete or outstanding requests, the
PATHMON process freezes the server class immediately. If any server process in the
server class has incomplete or outstanding requests, the PATHMON process does not
freeze the server class until these requests are completed. While awaiting completion
of such requests, the server class remains in the FREEZE-PENDING state and can
accept no new requests.
You can tell the PATHMON process to ignore the STOPMODE register, even if it is set,
by terminating the FREEZE SERVER command with an exclamation point, as shown
in this example:
= FREEZE SERVER SALES!
Keep in mind that some outstanding requests might not be fulfilled. (If the TMF
subsystem is running, transactions in process are backed out as part of the freeze.
For more details, see the description of the FREEZE SERVER command in
Section 12, SERVER Commands.)
To allow link managers to resume communication with a server class, enter the THAW
command. For instance, to thaw the SERVER named SALES, enter:
= THAW SERVER SALES
Note that the THAW command works only for server classes that are frozen. The
THAW command does not work for server classes that are in a FREEZE-PENDING
state.
Stopping SERVER Objects
Before you can stop a server with the STOP command, you must disable all
communication between link managers, such as LINKMON processes, ACS
subsystem processes, or TCPs, and the server by using the FREEZE SERVER
command.
For example, this command freezes all server processes in the server class CLASS-1:
= FREEZE SERVER CLASS-1
After the server class is frozen, you can stop the server process by stopping the server
class to which it belongs. (Note that there is a short period of time during which the