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Tivoli Storage Manager servers on AIX workstations, with an operating system level of 4.3.3 or greater and the asynchronous input/output (AIO) subsystem enabled, can take advantage of server performance options. These options enhance the data transfer capabilities to and from eligible Tivoli Storage Manager database volumes and log volumes in a disk storage pool. We recommend that you refer to the AIX documentation for additional information regarding the AIO subsystem and requirements. The performance options are:
To enable the server to use the AIX Asynchronous I/O support, set the AIXASYNCIO option to Yes. Asynchronous I/O support enhances system performance by allowing individual I/O requests to be gathered into one request and written to disk in parallel. To disable AIXASYNCIO support, set the option to NO. The default is for AIXASYNCIO not to be enabled.
The AIXDIRECTIO option is enabled by default or by specifying YES. To disable the direct I/O option, set the option to NO. Direct I/O enhances system performance by allowing write activities to skip caching and go directly to disk.