![]() |
![]() |
Specifies how many tape I/O buffers the server can use to write to or read from tape media. The default is 1.
The server determines the value based on settings for the TXNBYTELIMIT client option and the MOVEBATCHSIZE, MOVESIZETHRESH, TXNGROUPMAX, and USELARGEBUFFERS server options. The server 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 the server can use up to 9 buffers to overlap the I/O with BSAM:
tapeiobufs 9