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Tuning I/O operations for channel-to-channel connections z/OS Communications Server: SNA Network Implementation Guide SC27-3672-01 |
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VTAM® performs I/O operations across a channel-to-channel link. By analyzing statistics provided by VTAM, you can select I/O buffer sizes, data transfer delay, and other options that can improve performance of these I/O operations. VTAM uses channel programs to send data to other hosts. The amount of data that VTAM can read in one operation depends on the number of buffers used by a read channel program and on the size of each buffer. Each tuning statistics record contains information about the state of data-transfer operations between two VTAMs (using channel-to-channel adapters). Each record contains statistics that cover the time period since the last tuning statistics record was written for that controller or channel-to-channel connection. |
Copyright IBM Corporation 1990, 2014
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