Efficient I/O retry over QDIO

Details Efficient I/O retry over QDIO Efficient I/O retry over QDIO

2006-08-08

2006-08-08

Baderman, Scott (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C710S036000

Reexamination Certificate

active

07089457

ABSTRACT:
An efficient input/output (I/O) retry method which can be implemented in an enterprise-server configured with QDIO. The method can include attempting a QDIO-based data transfer between outbound and inbound queues in respective sending and target LPARs in the enterprise server. Responsive to detecting a busy condition resulting from the attempt; it can be determined whether the busy condition arose from an asynchronous busy condition. If it is determined that the busy condition arose from an asynchronous busy condition in the target LPAR, any attempt to retry the QDIO-based data transfer can be delayed. Subsequent to the delay, the QDIO-based data transfer can be re-attempted.

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