Appeal No. 2002-1812
Application 08/861,181
including a distributed computer operating system supporting
distributed and non-distributed applications is shown in Fig. 2
(col. 9, lines 20-25). A typical application environment 52A has
an application 56A which can issue a syncpoint 58A (commit or
backout); a single syncpoint manager (SPM) 60A; a plurality of
protected resource adapters (RA) 62A and 62B which interface on
behalf of application 56A with resource managers 63A, 63B, which
manage resource files 78A, 78B; a recovery facility 70A for
logging syncpoint managers and providing recovery for failing
syncpoints; and a protected conversation adapter (PCA) 64A
(col. 10, lines 16-19; col. 10, line 58 to col. 11, line 4;
col. 11, lines 39-47). The syncpoint architecture protects both
"resources," such as files 78A and 78B, and communication
"conversations" (a special type of resource) between two
applications. A "protected resource" is a resource that is
subject to any form of synchronization point processing or other
protective commit or back out procedure (definition at col. 92,
lines 41-45). A "protected conversation" is a conversation
between two applications that is subject to any form of syncpoint
processing or protective commit and backout procedure (col. 10,
lines 35-41; definition at col. 92, lines 35-39). Updates
performed between syncpoints are called a logical "unit of work"
and the updates are identified through a unique name assigned by
the syncpoint manager via the recovery facility called a logical
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