Unified data sets distributed over multiple I/O-device arrays

Details Unified data sets distributed over multiple I/O-device arrays Unified data sets distributed over multiple I/O-device arrays

2007-02-20

2007-02-20

McLean-Mayo, Kimberly (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S111000, C711S112000, C711S114000

Reexamination Certificate

active

10660192

ABSTRACT:
A hardware configuration and methodology for serializing or partially serializing WRITE requests directed to a unified data set are subsequently distributed to one or more remote arrays containing a corresponding mirror unified data set. For each unified data set, one of the local disk arrays over which the unified data set is distributed is selected as a supervisor disk array, and a unified sequence number component is included within that supervisor disk array. WRITE requests generated by a local array to mirror unified data set data to a mirror unified data set must be associated with a unified sequence number, and the WRITE requests are therefore serialized or partially serialized by the unified sequence number component. Additional direct communications links are provided between the local arrays over which a unified data set is distributed both to facilitate WRITE-request serialization and to provide a redundant communications paths for added reliability.

REFERENCES:
patent: 6275897 (2001-08-01), Bachmat
patent: 6308284 (2001-10-01), LeCrone et al.
patent: 6654831 (2003-11-01), Otterness et al.
patent: 2002/0138696 (2002-09-01), Kodama et al.
patent: 2005/0027892 (2005-02-01), McCabe et al.

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