Specifies how many tape I/O buffers TSM can use to write to or read from the IBM 3590 tape media. The default is 1.
Note: | TSM determines the value based on settings for the TXNBYTELIMIT client option
and the MOVEBATCHSIZE, MOVESIZETHRESH, TXNGROUPMAX, AND USELARGEBUFFERS server
options. TSM uses the maximum number of buffers it can fill before
reaching the end of the data transfer buffer or the end of the
transaction. A larger number of I/O buffers may increase I/O throughput
but require more memory. The memory required is determined by the
following formula:
number_of_buffers x 32K x mount limit |
Syntax
>>-TAPEIOBUFS--number_of_buffers-------------------------------><
Parameters
Examples
Specify that TSM can use up to 9 buffers to overlap the I/O with BSAM:
tapeiobufs 9