Apparatus and method to implement retry algorithms when...

Details Apparatus and method to implement retry algorithms when... Apparatus and method to implement retry algorithms when...

2007-07-03

2007-07-03

Sparks, Donald (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C714S043000, C709S224000

Reexamination Certificate

active

10779215

ABSTRACT:
A method to provide information from a first information storage and retrieval system to a second information storage and retrieval system, where the first information storage and retrieval system comprises (N) PPRC adapters and information. The method generates and saves an Established Path Bitmap which recites the (N) PPRC adapters, and generates an Available Path Bitmap. If a PPRC adapter is in communication with the secondary storage system, then the method adds that adapter to the Available Path Bitmap. The primary information storage and retrieval system generates a PPRC task comprising a flag set to “off”. The method copies the Available Path Bitmap as a Working Bitmap, and generates a PPRC request comprising a flag set to “on”, selects one of the adapters recited in the Working Bitmap, and provides the PPRC request to that selected adapter. The method then once attempts to provide information to the second information storage and retrieval system using the selected adapter.

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patent: 2005/0063334 (2005-03-01), Fnu et al.
patent: 2005/0080895 (2005-04-01), Cook et al.

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