Appeal No. 1999-1557
Application 08/650,397
This is a decision on appeal under 35 U.S.C. § 134
from the final rejection of claims 1-23, all the claims
pending in the instant application.
The instant invention relates to database recovery
procedures and specifically to a dual database system that
employs concurrent copy and update operations to recover from
a failure of either database without interrupting the
availability of the other database. Appellant’s Specification
("Specifica- tion”), page 1, lines 5-7. Appellant’s invention
provides a continuously available fault-tolerant database by
combining the copy operations necessary to reconstruct a
failed database with incoming database transactions occurring
during recovery. Specification, page 4, lines 2-4. The
active database system copies one record at a time while
interleaving updates into the operation stream at the
redundant database system. Specifica- tion, page 4, lines 4-
6. The concurrent redundant database system operations are
queued and interleaved with the normal active database
transaction processing operations. Specifica- tion, page 4,
2
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