The image O_1000.gif shows two databases, named SID1 (JTA database 1, OracleDS1) and SID2 (JTA database 2, OracleDS2), involved in a two-phase commit transaction. One database, named SID0 (two-phase commit engine named OracleCommitDS), functions as the two-phase commit engine. There is a database link between SID0 and each of SID1 and SID2. The link between SID0 and SID1 is named LINK1.machine1.com and the link between SID0 and SID1 is named LINK2.machine2.com. The user on each of SID0, SID1, and SID2 is named COORDUSR.

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