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Optional parameters

 

CommandScope (MQCFST)

Command scope (parameter identifier: MQCACF_COMMAND_SCOPE).

Specifies how the command is executed when the queue manager is a member of a queue-sharing group. We can specify one of the following:

  • blank (or omit the parameter altogether). The command is executed on the queue manager on which it was entered.

  • a queue manager name. The command is executed on the queue manager you specify, providing it is active within the queue sharing group. If you specify a queue manager name other than the queue manager on which it was entered, be using a queue-sharing group environment, and the command server must be enabled.

  • an asterisk (*). The command is executed on the local queue manager and is also passed to every active queue manager in the queue-sharing group.

The maximum length is MQ_QSG_NAME_LENGTH.

DeallocateInterval (MQCFIN)

Deallocation interval (parameter identifier: MQIACF_SYSP_DEALLOC_INTERVAL).

Specifies the length of time, in minutes, that an allocated archive read tape unit is allowed to remain unused before it is deallocated. This parameter, together with the MaxReadTapeUnits parameter, allows WebSphere MQ to optimize archive log reading from tape devices. You are recommended to specify the maximum possible values, within system constraints, for both parameters, in order to achieve the optimum performance for reading archive tapes.

Specify a value in the range zero and 1440. Zero means that a tape unit is deallocated immediately. If you specify a value of 1440, the tape unit is never deallocated.

MaxArchiveLog (MQCFIN)

Specifies the maximum number of archive log volumes that can be recorded in the BSDS (parameter identifier: MQIACF_SYSP_MAX_ARCHIVE).

When this value is exceeded, recording recommences at the start of the BSDS.

Specify a value in the range 10 through 100.

MaxReadTapeUnits (MQCFIN)

Specifies the maximum number of dedicated tape units that can be allocated to read archive log tape volumes (parameter identifier: MQIACF_SYSP_MAX_READ_TAPES).

This parameter, together with the DeallocateInterval parameter, allows WebSphere MQ to optimize archive log reading from tape devices.

Specify a value in the range 1 through 99.

If you specify a value that is greater than the current specification, the maximum number of tape units allowable for reading archive logs increases. If you specify a value that is less than the current specification, tape units that are not being used are immediately deallocated to adjust to the new value. Active, or premounted, tapes remain allocated.

OutputBufferCount (MQCFIN)

Specifies the number of 4 KB output buffers to be filled before they are written to the active log data sets (parameter identifier: MQIACF_SYSP_OUT_BUFFER_COUNT).

Specify the number of buffers in the range 1 through 256.

The larger the number of buffers, the less often the write takes place, and this improves the performance of WebSphere MQ. The buffers might be written before this number is reached if significant events, such as a commit point, occur.

 

Parent topic:

Set Log


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