Communications Access Methods for SAS/CONNECT and SAS/SHARE Software

System Configuration for the IUCV Access Method for SAS/SHARE

Systems Personnel

To configure resources for the CMS system that will enable it to behave as either a SAS/SHARE server or a client using the IUCV access method, perform the following tasks:

At a CMS server, create a VM directory entry for the server's virtual machine.
At a CMS client, create an entry in the VM directory for each user who will access the server.

Creating the Server VM Directory Entry for the Server Virtual Machine

You must include the following statements in the VM directory entry for the server's virtual machine:

USER SASSHARE XXXXXXX 20M 20M G 100
MACHINE XA
IPL CMS PARM AUTOCR
OPTION MAXCONN 1024
IUCV ALLOW PRIORITY MSGLIMIT 255
CONSOLE 009 3215
SPOOL   00C 2540 READER *
SPOOL   00D 2540 PUNCH A
SPOOL   00E 1403 A
LINK MAINT 19E 19E RR
LINK MAINT 19D 19D RR
LINK MAINT 190 190 RR
MDISK 191 3380 707 5 VM0800 MR XXXXXXX
MDISK 192 3380 501 3 VM0450 MR XXXXXXX

Several lines that are specific to the IUCV access method are explained in more detail.

OPTION MAXCONN 1024
IUCV ALLOW PRIORITY MSGLIMIT 255

The first line specifies the maximum number of simultaneous connections to the server that you want to allow. Generally, you should allow four to five connections for each user who accesses data through the server. The number shown is only a guideline. The default MAXCONN value is 64. The maximum MAXCONN value is 65535.

The second line allows users to establish IUCV connections to the server's virtual machine. The ALLOW parameter enables users to establish IUCV connections to the server's virtual machine.

The PRIORITY parameter enables the server to send IUCV priority messages to users.

The MSGLIMIT parameter increases the number of outstanding messages allowed on each path from the default value of 10 to 255.

Modifying an Entry in the VM Directory for Each User

Modify the VM directory entry by including the following statement in the VM directory entry for each user who will access a server:

OPTION MAXCONN 128

This statement specifies the maximum number of simultaneous connections to a server that you want to allow. Generally, you should allow four to five connections for each server. The default MAXCONN value is 64. The maximum MAXCONN value is 65535.

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