num_tachyon_adapters

num_tachyon_adapters specifies the number of Fiber-Channel Tachyon adapters in the system if the system does not support I/O virtual addressing.

Acceptable Values:

Minimum
0
Maximum
5
Default
0

Specify integer value or use integer formula expression. A non-zero value is required if the system does not provide I/O virtual addressing. Choose a value equal to the number of Tachyon FCP adapters installed in the system. See Specifying Parameter Values.

Description

num_tachyon_adapters specifies how many Tachyon FCP adapters are installed in the system so that an appropriate amount of memory can be allocated for them at system start-up if the system does not provide I/O virtual addressing.

Specifying a Value for num_tachyon_adapters

If your system does not provide I/0 virtual addressing, set num_tachyon_adapters equal to the number of Tachyon FCP adapters actually installed in the machine. During boot-up, the system then reserves a corresponding amount of memory for use by those adapters, varying that amount according to the value of max_fcp_reqs.

If the system supports I/O virtual addressing, set this parameter to zero. The system then automatically allocates memory as needed.

If you do not know whether your system provides I/O virtual addressing, setting this parameter to a non-zero value is harmless, provided the value does not exceed the number of Tachyon FCP adapters actually installed in the system. If the value exceeds the number of installed adapters, a corresponding amount of memory is wasted because it cannot be used for other purposes.

Related Parameters and System Values

The system allocates memory for use by Tachyon FCP adapters based on the comination of values specified for num_tachyon_adapters and max_fcp_reqs.

Additional Information