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Maintenance Commands

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gabport - Utility to configure and display information about Group and Atomic Broadcast (GAB) ports


gabport -p port [-h timeout ]


The gabport utility displays GAB port information or changes the heartbeat timeout value of a user client process on a GAB port. In normal operation, a GAB client process should heartbeat to GAB at a certain interval. GAB uses this mechanism to monitor the aliveness of a GAB user client process. If a client process does not heartbeat in the predefined timeout period, GAB kills the client. As a result, the port is closed.


-p port
The port to query or change the timeout value. port is specified as GAB port names a-z.
-h timeout
Specify a heartbeat timeout value(in milliseconds) for a client process. The heartbeat statistics are reset by this command.
Display port membership. If the port is used by a user client, it also displays the client process heartbeat statistics.


1) Display information about a port used by a user client
# gabport -p h

Port h Information:
Flags:          0xe00
Membership:     gab01 gab02 gab04 

heartbeat timeout:           15000 (msec)
heartbeat warn interval:      1000 (msec)
heartbeat statistics:
     0 ~   3000 (msec): 4177
  3000 ~   6000 (msec): 0
  6000 ~   9000 (msec): 0
  9000 ~  12000 (msec): 0
 12000 ~  15000 (msec): 0
2) Change the client process timeout value to 16 seconds
# gabport -p h -h 16000
Port h new heartbeat timeout:      16000 msecs


gabconfig (1M), gabdisk (1M)

Last updated: March 2006
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