DB2 Server for VSE servers enable distributed unit of work support when the parameters RMTUSERS=n, where n>=1, and SYNCPNT=Y are specified at startup. By specifying SYNCPNT=Y, the DB2 Server for VSE server can participate in "multiple-site read multiple-site update" logical units of work. This requires the DRDA task-related user exit to interface with the CICS/VSE Syncpoint Manager. However if SYNCPNT=N is specified or the DRDA task-related user exit program is not enabled, then the AXE transaction does not interface with the CICS/VSE Syncpoint Manager. This restricts the DB2 Server for VSE server to participate in "multiple-site read single-site update" units of work, where the DB2 Server for VSE server may be one of the multiple sites where data is only read, or it may be the single site where data is updated.
Once a DB2 Server for VSE application server is initialized and ready to accept connections from application requesters, then any DRDA2 DUOW application requester (such as DDCS Version 2.3, DB2 for MVS Version 3.1 and DB2 for OS/400 Version 2.3) may distribute units of work to that DB2 Server for VSE application server.
| Note: | If SYNCPNT=Y has been specified but the DRDA task-related user
exit program is not enabled, the following message is issued on the DB2 Server
for VSE operator console:
ARI0172E A Sync Point Manager is not available. ARI0176I The SYNCPNT parameter has been reset to N.and DB2 Server for VSE runs as if the SYNCPNT startup parameter had been set to "N". |