DB2 Server for VSE & VM: Operation

Starting VSE Guest Sharing Support

To give a VSE guest access to a VM application server, specify the SET APPCVM commands in the VSE IPL procedure. The SET APPCVM command determines the application server that the VSE guest accesses. Online and batch users can access any application server.

The following diagram illustrates the syntax of the SET APPCVM command:

>>-SET APPCVM TARGET----+-resid-------------------+------------>< '-| avs-parameter-block |-' avs_parameter_block |--resid----(mode_name,gateway_name,target_LU_name)-------------|

In the command, the variables have the following meanings:

resid

is the resource identifier of the application server. This name is the same as the resid variable on the IUCV *IDENT entry in the application server directory on VM.

avs_parameter_block

specify these variables only when you want the VSE guest to access an application server in an SNA network. Specify the parameters in the order shown above. For more information on specifying for the AVS parameters, see the VM/ESA: CP Command and Utility Reference.

VSE Guest Sharing Operator Responsibilities

If you have a VSE guest sharing a VM application server, you can use all DB2 Server for VM operator commands to monitor and control VSE guest usage. You must enter these commands from the DB2 Server for VM operator console on VM. You can also resolve in-doubt logical units of work.

In-doubt logical units of work can occur if a VSE guest online user is committing a logical unit of work when the application server or CICS ends abnormally. CICS tries to automatically resolve in-doubt logical units of work. There are times, however, when you may want to manually resolve in-doubt logical units of work, such as when CICS is unable to automatically resolve the in-doubt unit of work or if you cannot wait for CICS to resolve the in-doubt unit of work.

For more information about resolving in-doubt logical units of work, see Resolving CICS In-Doubt Logical Units of Work.