Defining CICS sessions

For each CICS® connection definition, define one or more session definitions to specify the SNA mode groups to be used within that connection, if you are not using autoinstalled connections.

Use CEDA to create a SESSION definition with the following settings:

Connection
Set to the name of the associated connection definition.
MOdename
Specify the mode group as defined in a VTAM® LOGMODE. The modename must be unique among the sessions definitions that relate to one connection definition.
Protocol
Set to APPC.
MAximum
Specify the maximum number of sessions that are to be supported. The first value is the maximum number of sessions that can be supported. The second value specifies the number of contention-winner sessions (CICS-owned sessions). These values are negotiated during change number of sessions (CNOS) flows, when the sessions are actually bound; the negotiated values depend on the settings specified in the partner SNA node.

Set the first value to be at least as big as the MAXREQUESTS parameter in the ctg.ini file, to prevent a bottleneck to throughput. Set the second value to 001, to ensure that START requests are shipped serially from the server to the client.

Autoconnect
Set to determine whether the sessions for this mode group will be bound when the connection is installed. Set it to one of the following:
  • Yes to bind only contention-winner sessions
  • All to bind all sessions

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Timestamp icon Last updated: Tuesday, 19 November 2013


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