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Message Posted: Fri, 08 Mar 2002 @ 09:22:41 GMT
The even address is used to the send of data from the TDP to the Teradata system, the odd is for the return parcel.
You would always have a pair of device addresses on the single PBSA (1 PBSA can take up to 8 pairs, but throughput gain drops off after 2 pairs). The PDECONFIG assigns a device pair to a port on the PBSA by the assignment of the even number (last 2 digits only) and the odd therefore gets assigned to the same port. Thus the ESCON infrastructure would have the devices associated with that card/fibre link.
By your question you must have 2 PBSA cards on 1 node by your question which I find is not normally done (unless the system is only 1 or 2 nodes). In the bigger MPP environments I work on normally the PBSA's are spread 1 per node for resilience (saying that though there is one customer I deal with that is an exception to that, where larger throughput is needed and they have more than one PBSA per node on some nodes).
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